prompt_front: Answer the question based on the given passages. Only give me the answer and do not output any other words.

Question: Gary L. Bennett was a part of the space missions that have a primary destination of what celestial body?

The following are given passages.
Context 1: Passage 1:
Gary L  Bennett
Gary L  Bennett (born January 17, 1940) is an American scientist and engineer, specializing in aerospace and energy   He has worked for NASA and the US Department of Energy (DOE) on advanced space power systems and advanced space propulsion systems   His professional career has included work on the Voyager, Galileo, and Ulysses space missions, and is currently working as a consultant in aerospace power and propulsion systems  He is also a science fiction author (The Star Sailors) 

Biography
Bennett was born in Twin Falls, Idaho  He joined the NASA headquarters in June 1988 as the Manager of Advanced Space Power Systems in the transportation division of the Office of Advanced Concepts and Technology  There, he managed a number of transportation technology programs including hybrid propulsion, electric propulsion, low-thrust chemical propulsion, and other advanced propulsion concepts (e g , fusion, antimatter)  He was also the first program manager of the advanced technology insertion program for the Pluto Fast Flyby (now New Horizons) mission and the TIMED space physics mission 
Prior to coming to NASA, Bennett held key positions in DoE's space radioisotope power program, including serving as Director of Safety and Nuclear Operations for the radioisotope power sources that were used on the Galileo mission to Jupiter and that are being used on the Ulysses mission to explore the polar regions of the Sun   This same radioisotope power source design was then flown on the Cassini mission to Saturn and on the New Horizons mission to Jupiter 
Previous positions included Chief of the Research Support Branch in the US Nuclear Regulatory Commission (NRC) where Bennett was instrumental in creating and managing NRC's reactor operational safety research program 
Bennett was the flight safety manager for the radioisotope power sources currently in use on the Voyager 1 and Voyager 2 spacecraft (which went to Jupiter, Saturn, Uranus, Neptune and beyond) and on Lincoln Laboratory's LES 8 and LES 9 communications satellites 
Bennett also worked as a physicist in the NERVA (Nuclear Engine for Rocket Vehicle Applications) program at what was then NASA's Lewis Research Center (now the John H  Glenn Research Center) in Cleveland, Ohio   He did fundamental reactor safety research at what is now the Department of Energy's Idaho National Laboratory (INL) 
From 1980 to 1988, he was a member of or adviser to US delegations to the two subcommittees of the United Nations Committee on the Peaceful Uses of Outer Space and he prepared the official US position papers on the use of nuclear power sources in outer space 
From 1988 to 1990, Bennett chaired the Steering Group of the Interagency Advanced Power Group (IAPG), the national coordinating group for federally sponsored space and terrestrial power research   During his tenure and under his initiative the IAPG saw its greatest increase in membership 
Bennett received his PhD in physics from Washington State University in 1970; a Master of Nuclear Science degree in 1966, and a BSc degree in physics from the University of Idaho in 1962; and an Associate of Arts degree from Boise Junior College (now Boise State University) in 1960 
Since 1995, he has been active in promoting the teaching of science (specifically evolution) and received the Friend of Darwin Award  Bennett has also been a champion of the First Amendment and was elected to the National Advisory Council of Americans United for Separation of Church and State 

Selected works
Bennett has authored or coauthored over 160 technical papers, reports and articles on power, propulsion, and space missions 
Science fiction

G L  Bennett (1980)  The Star Sailors  ISBN 978-0-312-75582-9 Chapters in:

M S  El-Genk (1997)  A Critical Review of Space Nuclear Power and Propulsion, 1984-1993  ISBN 978-1-56396-317-9 
D M  Rowe (1995)  CRC Handbook of Thermoelectrics  ISBN 978-0-8493-0146-9 
R A  Meyers (2001)  Encyclopedia of Physical Science and Technology (3rd ed )  ISBN 978-0-12-227410-7 

Awards
In 2000, he received the Friend of Darwin Award by the National Center for Science Education
In 1996, he received the Schreiber-Spence Space Achievement Award for his leadership of the safety and nuclear operations for the Galileo and Ulysses radioisotope power source programs 
In 1995, he shared in the American Institute of Aeronautics and Astronautics (AIAA) Aerospace Power Systems Award and Medal for his leadership of the Ulysses radioisotope power source program 
In 1994, he received the Silver & Gold Award from the University of Idaho Alumni Association
In 1990, he received the Distinguished Alumnus Award from Boise State University

Associations
American Institute of Aeronautics and Astronautics (fellow)
American Physical Society (fellow)
British Interplanetary Society (fellow)
Passage 2:
Planetary protection
Planetary protection is a guiding principle in the design of an interplanetary mission, aiming to prevent biological contamination of both the target celestial body and the Earth in the case of sample-return missions  Planetary protection reflects both the unknown nature of the space environment and the desire of the scientific community to preserve the pristine nature of celestial bodies until they can be studied in detail There are two types of interplanetary contamination  Forward contamination is the transfer of viable organisms from Earth to another celestial body   Back contamination is the transfer of extraterrestrial organisms, if they exist, back to the Earth's biosphere 

History
The potential problem of lunar and planetary contamination was first raised at the International Astronautical Federation VIIth Congress in Rome in 1956 In 1958 the U S  National Academy of Sciences (NAS) passed a resolution stating, “The National Academy of Sciences of the United States of America urges that scientists plan lunar and planetary studies with great care and deep concern so that initial operations do not compromise and make impossible forever after critical scientific experiments ” This led to creation of the ad hoc Committee on Contamination by Extraterrestrial Exploration (CETEX), which met for a year and recommended that interplanetary spacecraft be sterilized, and stated, “The need for sterilization is only temporary  Mars and possibly Venus need to remain uncontaminated only until study by manned ships becomes possible” In 1959, planetary protection was transferred to the newly formed Committee on Space Research (COSPAR)  COSPAR in 1964 issued Resolution 26 affirming that:

the search for extraterrestrial life is an important objective of space research, that the planet of Mars may offer the only feasible opportunity to conduct this search during the foreseeable future, that contamination of this planet would make such a search far more difficult and possibly even prevent for all time an unequivocal result, that all practical steps should be taken to ensure that Mars be not biologically contaminated until such time as this search has been satisfactorily carried out, and that cooperation in proper scheduling of experiments and use of adequate spacecraft sterilization techniques is required on the part of all deep space probe launching authorities to avoid such contamination 
In 1967, the US, USSR, and UK ratified the United Nations Outer Space Treaty   The legal basis for planetary protection lies in Article IX of this treaty:
"Article IX:     States Parties to the Treaty shall pursue studies of outer space, including the Moon and other celestial bodies, and conduct exploration of them so as to avoid their harmful contamination and also adverse changes in the environment of the Earth resulting from the introduction of extraterrestrial matter and, where necessary, shall adopt appropriate measures for this purpose    
This treaty has since been signed and ratified by 104 nation-states  Another 24 have signed but not ratified   All the current space-faring nation-states, along with all current aspiring space-faring nation-states, have both signed and ratified the treaty The Outer Space Treaty has consistent and widespread international support, and as a result of this, together with the fact that it is based on the 1963 declaration which was adopted by consensus in the UN National Assembly, it has taken on the status of customary international law  The provisions of the Outer Space Treaty are therefore binding on all states, even those who have neither signed nor ratified it For forward contamination, the phrase to be interpreted is "harmful contamination"   Two legal reviews came to differing interpretations of this clause (both reviews were unofficial)  However the currently accepted interpretation is that “any contamination which would result in harm to a state’s experiments or programs is to be avoided”  NASA policy states explicitly that “the conduct of scientific investigations of possible extraterrestrial life forms, precursors, and remnants must not be jeopardized” 

COSPAR recommendations and categories
The Committee on Space Research (COSPAR) meets every two years, in a gathering of 2000 to 3000 scientists, and one of its tasks is to develop recommendations for avoiding interplanetary contamination  Its legal basis is Article IX of the Outer Space Treaty  (see history below for details) 
Its recommendations depend on the type of space mission and the celestial body explored   COSPAR categorizes the missions into 5 groups:

Category I: Any mission to locations not of direct interest for chemical evolution or the origin of life, such as the  Sun or Mercury  No planetary protection requirements 
Category II: Any mission to locations of significant interest for chemical evolution and the origin of life, but only a remote chance that spacecraft-borne contamination could compromise investigations  Examples include the Moon, Venus, and comets  Requires simple documentation only, primarily to outline intended or potential impact targets, and an end of mission report of any inadvertent impact site if such occurred 
Category III: Flyby and orbiter missions to locations of significant interest for chemical evolution or the origin of life, and with a significant chance that contamination could compromise investigations e g , Mars, Europa, Enceladus  Requires more involved documentation than Category II  Other requirements, depending on the mission, may include trajectory biasing, clean room assembly, bioburden reduction, and if impact is a possibility, inventory of organics 
Category IV: Lander or probe missions to the same locations as Category III  Measures to be applied depend on the target body and the planned operations  "Sterilization of the entire spacecraft may be required for landers and rovers with life-detection experiments, and for those landing in or moving to a region where terrestrial microorganisms may survive and grow, or where indigenous life may be present  For other landers and rovers, the requirements would be for decontamination and partial sterilization of the landed hardware "Missions to Mars in category IV are subclassified further:Category IVa  Landers that do not search for Martian life - uses the Viking lander pre-sterilization requirements, a maximum of 300,000 spores per spacecraft and 300 spores per square meter 
Category IVb  Landers that search for Martian life   Adds stringent extra requirements to prevent contamination of samples 
Category IVc  Any component that accesses a Martian special region (see below) must be sterilized to at least to the Viking post-sterilization biological burden levels of 30 spores total per spacecraft Category V: This is further divided into unrestricted and restricted sample return Unrestricted Category V: samples from locations judged by scientific opinion to have no indigenous lifeforms  No special requirements 
Restricted Category V: (where scientific opinion is unsure) the requirements include: absolute prohibition of destructive impact upon return, containment of all returned hardware which directly contacted the target body, and containment of any unsterilized sample returned to Earth For Category IV missions, a certain level of biological burden is allowed for the mission  In general this is expressed as a 'probability of contamination', required to be less than one chance in 10,000 of forward contamination per mission, but in the case of Mars Category IV missions (above) the requirement has been translated into a count of Bacillus spores per surface area, as an easy to use assay method More extensive documentation is also required for Category IV  Other procedures required, depending on the mission, may include trajectory biasing, the use of clean rooms during spacecraft assembly and testing, bioload reduction, partial sterilization of the hardware having direct contact with the target body, a bioshield for that hardware, and, in rare cases, complete sterilization of the entire spacecraft For restricted Category V missions, the current recommendation is that no uncontained samples should be returned unless sterilized  Since sterilization of the returned samples would destroy much of their science value, current proposals involve containment and quarantine procedures  For details, see Containment and quarantine below  Category V missions also have to fulfill the requirements of Category IV to protect the target body from forward contamination 

Mars special regions
A special region is a region classified by COSPAR where terrestrial organisms could readily propagate, or thought to have a high potential for existence of Martian life forms  This is understood to apply to any region on Mars where liquid water occurs, or can occasionally occur, based on the current understanding of requirements for life 
If a hard landing risks biological contamination of a special region, then the whole lander system must be sterilized to COSPAR category IVc 

Target categories
Some targets are easily categorized  Others are assigned provisional categories by COSPAR, pending future discoveries and research 
The 2009 COSPAR Workshop on Planetary Protection for Outer Planet Satellites and Small Solar System Bodies covered this in some detail  Most of these assessments are from that report, with some future refinements  This workshop also gave more precise definitions for some of the categories:

Category I
“not of direct interest for understanding the process of chemical evolution or the origin of life ” 
Io, Sun, Mercury, undifferentiated metamorphosed asteroids

Category II
… where there is only a remote chance that contamination carried by a spacecraft could jeopardize future exploration”  In this case we define “remote chance” as “the absence of niches (places where terrestrial microorganisms could proliferate) and/or a very low likelihood of transfer to those places ” 
Callisto, comets, asteroids of category P, D, and C, Venus, Kuiper belt objects (KBO) < 1/2 size of Pluto 

Provisional Category II
Ganymede, Titan, Triton, the Pluto–Charon system, and other large KBOs (> 1/2 size of Pluto), CeresProvisionally, they assigned these objects to Category II  However, they state that more research is needed, because there is a remote possibility that the tidal interactions of Pluto and Charon could maintain some water reservoir below the surface  Similar considerations apply to the other larger KBOs 
Triton is insufficiently well understood at present to say it is definitely devoid of liquid water  The only close up observations to date are those of Voyager 2 
In a detailed discussion of Titan, scientists concluded that there was no danger of contamination of its surface, except short term adding of negligible amounts of organics, but Titan could have a below surface water reservoir that communicates with the surface, and if so, this could be contaminated 
In the case of Ganymede, the question is, given that its surface shows pervasive signs of resurfacing, is there any communication with its subsurface ocean? They found no known mechanism by which this could happen, and the Galileo spacecraft found no evidence of cryovolcanism  Initially, they assigned it as Priority B minus, meaning that precursor missions are needed to assess its category before any surface missions  However, after further discussion they provisionally assigned it to Category II, so no precursor missions are required, depending on future research 
If there is cryovolcanism on Ganymede or Titan, the undersurface reservoir is thought to be 50 – 150 km below the surface  They were unable to find a process that could transfer the surface melted water back down through 50 km of ice to the under surface sea  This is why both Ganymede and Titan were assigned a reasonably firm provisional Category II, but pending results of future research 
Icy bodies that show signs of recent resurfacing need further discussion and might need to be assigned to a new category depending on future research  This approach has been applied, for instance, to missions to Ceres  The planetary protection Category is subject for review during the mission of the Ceres orbiter (Dawn) depending on the results found 

Category III / IV
“…where there is a significant chance that contamination carried by a spacecraft could jeopardize future exploration ” We define “significant chance” as “the presence of niches (places where terrestrial microorganisms could proliferate) and the likelihood of transfer to those places ” 
Mars because of possible subsurface habitats 
Europa because of its subsurface ocean 
Enceladus because of evidence of water plumes 

Category V
Unrestricted Category V: “Earth-return missions from bodies deemed by scientific opinion to have no indigenous life forms ”
Restricted Category V: "Earth-return missions from bodies deemed by scientific opinion to be of significant interest to the process of chemical evolution or the origin of life "
In the category V for sample return the conclusions so far are:
Unrestricted Category V: Venus, the Moon 
Restricted Category V: Mars, Europa, Enceladus 

The Coleman–Sagan equation
The aim of the current regulations is to keep the number of microorganisms low enough so that the probability of contamination of Mars (and other targets) is acceptable  It is not an objective to make the probability of contamination zero 
The aim is to keep the probability of contamination of 1 chance in 10,000 of contamination per mission flown  This figure is obtained typically by multiplying together the number of microorganisms on the spacecraft, the probability of growth on the target body, and a series of bioload reduction factors 
In detail the method used is the Coleman–Sagan equation 
  
    
      
        P
        
          c
        
      
      =
      
        N
        
          0
        
      
      R
      
        P
        
          S
        
      
      
        P
        
          t
        
      
      
        P
        
          R
        
      
      
        P
        
          g
        
      
    
    P_{c}=N_{0}RP_{S}P_{t}P_{R}P_{g}
   
where 

  
    
      N
      
        0
      
    
    N_{0}
   = the number of microorganisms on the spacecraft initially

  
    R
    R
   = Reduction due to conditions on spacecraft before and after launch

  
    
      P
      
        S
      
    
    P_{S}
   = Probability that microorganisms on the spacecraft reach the surface of the planet

  
    
      P
      
        t
      
    
    P_{t}
   = Probability that spacecraft will hit the planet - this is 1 for a lander

  
    
      P
      
        R
      
    
    P_{R}
   = Probability of microorganism to be released in the environment when on the ground, usually set to 1 for crashlanding 

  
    
      P
      
        g
      
    
    P_{g}
   = Probability of growth  For targets with liquid water this is set to 1 for sake of the calculation Then the requirement is 
  
    
      
        P
        
          c
        
      
      <
      
        10
        
          −
          4
        
      
    
    P_{c}<10^{-4}
  
The 
  
    
      10
      
        −
        4
      
    
    10^{-4}
   is a number chosen by Sagan et al , somewhat arbitrarily  Sagan and Coleman assumed that about 60 missions to the Mars surface would occur before the exobiology of Mars is thoroughly understood, 54 of those successful, and 30 flybys or orbiters, and the number was chosen to endure a probability to keep the planet free from contamination of at least 99 9% over the duration of the exploration period 

Critiques
The Coleman–Sagan equation has been criticised because the individual parameters are often not known to better than a magnitude or so  For example, the thickness of the surface ice of Europa is unknown, and may be thin in places, which can give rise to a high level of uncertainty in the equation  It has also been criticised because of the inherent assumption made of an end to the protection period and future human exploration  In the case of Europa, this would only protect it with reasonable probability for the duration of the period of exploration Greenberg has suggested an alternative, to use the natural contamination standard — that our missions to Europa should not have a higher chance of contaminating it than the chance of contamination by meteorites from Earth 
As long as the probability of people infecting other planets with terrestrial microbes is substantially smaller than the probability that such contamination happens naturally, exploration activities would, in our view, be doing no harm  We call this concept the natural contamination standard 
Another approach for Europa is the use of binary decision trees which is favoured by the Committee on Planetary Protection Standards for Icy Bodies in the Outer Solar System under the auspices of the Space Studies Board  This goes through a series of seven steps, leading to a final decision on whether to go ahead with the mission or not 
Recommendation: Approaches to achieving planetary protection should not rely on the multiplication of bioload estimates and probabilities to calculate the likelihood of contaminating Solar System bodies with terrestrial organisms unless scientific data unequivocally define the values, statistical variation, and mutual independence of every factor used in the equation Recommendation: Approaches to achieving planetary protection for missions to icy Solar System bodies should employ a series of binary decisions that consider one factor at a time to determine the appropriate level of planetary protection procedures to use 

Containment and quarantine for restricted Category V sample return
In the case of restricted Category V missions, Earth would be protected through quarantine of sample and astronauts in a yet to be built Biosafety level 4 facility  In the case of a Mars sample return, missions would be designed so that no part of the capsule that encounters the Mars surface is exposed to the Earth environment  One way to do that is to enclose the sample container within a larger outer container from Earth, in the vacuum of space  The integrity of any seals is essential and the system must also be monitored to check for the possibility of micro-meteorite damage during return to Earth The recommendation of the ESF report is that
“No uncontained Mars materials, including space craft surfaces that have been exposed to the Mars environment should be returned to Earth unless sterilised"   "For unsterilised samples returned to Earth, a programme of life detection and biohazard testing, or a proven sterilisation process, shall be undertaken as an absolute precondition for the controlled distribution of any portion of the sample ”
No restricted category V returns have been carried out  During the Apollo program, the sample-returns were regulated through the Extra-Terrestrial Exposure Law  This was rescinded in 1991, so new regulations would need to be enacted  The Apollo era quarantine procedures are of interest as the only attempt to date of a return to Earth of a sample that, at the time, was thought to have a remote possibility of including extraterrestrial life 
Samples and astronauts were quarantined in the Lunar Receiving Laboratory  The methods used would be considered inadequate for containment by modern standards  Also the lunar receiving laboratory would be judged a failure by its own design criteria as the sample return didn't contain the lunar material, with two failure points during the Apollo 11 return mission, at the splashdown and at the facility itself 
However the Lunar Receiving Laboratory was built quickly with only two years from start to finish, a time period now considered inadequate  Lessons learned from it can help with design of any Mars sample return receiving facility Design criteria for a proposed Mars Sample Return Facility, and for the return mission, have been developed by the American National Research Council, and the European Space Foundation  They concluded that it could be based on biohazard 4 containment but with more stringent requirements to contain unknown microorganisms possibly as small as or smaller than the smallest Earth microorganisms known, the ultramicrobacteria  The ESF study also recommended that it should be designed to contain the smaller gene transfer agents if possible, as these could potentially transfer DNA from martian microorganisms to terrestrial microorganisms if they have a shared evolutionary ancestry  It also needs to double as a clean room facility to protect the samples from terrestrial contamination that could confuse the sensitive life detection tests that would be used on the samples 
Before a sample return, new quarantine laws would be required  Environmental assessment would also be required, and various other domestic and international laws not present during the Apollo era would need to be negotiated 

Decontamination procedures
For all spacecraft missions requiring decontamination, the starting point is clean room assembly in US federal standard class 100 cleanrooms  These are rooms with fewer than 100 particles of size 0 5 µm or larger per cubic foot  Engineers wear cleanroom suits with only their eyes exposed  Components are sterilized individually before assembly, as far as possible, and they clean surfaces frequently with alcohol wipes during assembly  Spores of Bacillus subtilis was chosen for not only its ability to readily generate spores, but its well-established use as a model species  It is a useful tracker of UV irradiation effects because of its high resilience to a variety of extreme conditions  As such it is an important indicator species for forward contamination in the context of planetary protection 
For Category IVa missions (Mars landers that do not search for Martian life), the aim is to reduce the bioburden to 300,000 bacterial spores on any surface from which the spores could get into the Martian environment  Any heat tolerant components are heat sterilized to 114 °C  Sensitive electronics such as the core box of the rover including the computer, are sealed and vented through high-efficiency filters to keep any microbes inside For more sensitive missions such as Category IVc (to Mars special regions), a far higher level of sterilization is required  These need to be similar to levels implemented on the Viking landers, which were sterilized for a surface which, at the time, was thought to be potentially hospitable to life similar to special regions on Mars today 
In microbiology, it is usually impossible to prove that there are no microorganisms left viable, since many microorganisms are either not yet studied, or not cultivable  Instead, sterilization is done using a series of tenfold reductions of the numbers of microorganisms present  After a sufficient number of tenfold reductions, the chance that there any microorganisms left will be extremely low The two Viking Mars landers were sterilized using dry heat sterilization   After preliminary cleaning to reduce the bioburden to levels similar to present day Category IVa spacecraft, the Viking spacecraft were heat-treated for 30 hours at 112 °C, nominal 125 °C (five hours at 112 °C was considered enough to reduce the population tenfold even for enclosed parts of the spacecraft, so this was enough for a million-fold reduction of the originally low population) Modern materials however are often not designed to handle such temperatures, especially since modern spacecraft often use "commercial off the shelf" components  Problems encountered include nanoscale features only a few atoms thick, plastic packaging, and conductive epoxy attachment methods  Also many instrument sensors cannot be exposed to high temperature, and high temperature can interfere with critical alignments of instruments As a result, new methods are needed to sterilize a modern spacecraft to the higher categories such as Category IVc for Mars, similar to Viking  Methods under evaluation, or already approved, include:

Vapour phase hydrogen peroxide - effective, but can affect finishes, lubricants and materials that use aromatic rings and sulfur bonds  This has been established, reviewed, and a NASA/ESA specification for use of VHP has been approved by the Planetary Protection Officer, but it has not yet been formally published 
Ethylene oxide - this is widely used in the medical industry, and can be used for materials not compatible with hydrogen peroxide  It is under consideration for missions such as ExoMars 
Gamma radiation and electron beams have been suggested as a method of sterilization, as they are used extensively in the medical industry  They need to be tested for compatibility with spacecraft materials and hardware geometries, and are not yet ready for review Some other methods are of interest as they can sterilize the spacecraft after arrival on the planet 
Supercritical carbon dioxide snow (Mars) - is most effective against traces of organic compounds rather than whole microorganisms  Has the advantage though that it eliminates the organic traces - while other methods kill the microorganisms, they leave organic traces that can confuse life detection instruments  Is under study by JPL and ESA 
Passive sterilization through UV radiation (Mars)  Highly effective against many microorganisms, but not all, as a Bacillus strain found in spacecraft assembly facilities is particularly resistant to UV radiation  Is also complicated by possible shadowing by dust and spacecraft hardware 
Passive sterilization through particle fluxes (Europa)  Plans for missions to Europa take credit for reductions due to this 

Bioburden detection and assessment
The spore count is used as an indirect measure of the number of microorganisms present  Typically 99% of microorganisms by species will be non-spore forming and able to survive in dormant states, and so the actual number of viable dormant microorganisms remaining on the sterilized spacecraft is expected to be many times the number of spore-forming microorganisms 
One new spore method approved is the "Rapid Spore Assay"  This is based on commercial rapid assay systems, detects spores directly and not just viable microorganisms and gives results in 5 hours instead of 72 hours 

Challenges
It is also long been recognized that spacecraft cleaning rooms harbour polyextremophiles as the only microbes able to survive in them  For example, in a recent study, microbes from swabs of the Curiosity rover were subjected to desiccation, UV exposure, cold and pH extremes  Nearly 11% of the 377 strains survived more than one of these severe conditions  The genomes of resistant spore producing Bacillus sp  have been studied and genome level traits potentially linked to the resistance have been reported This does not mean that these microbes have contaminated Mars  This is just the first stage of the process of bioburden reduction  To contaminate Mars they also have to survive the low temperature, vacuum, UV and ionizing radiation during the months long journey to Mars, and then have to encounter a habitat on Mars and start reproducing there  Whether this has happened or not is a matter of probability  The aim of planetary protection is to make this probability as low as possible  The currently accepted target probability of contamination per mission is to reduce it to less than 0 01%, though in the special case of Mars, scientists also rely on the hostile conditions on Mars to take the place of the final stage of heat treatment decimal reduction used for Viking  But with current technology scientists cannot reduce probabilities to zero 

New methods
Two recent molecular methods have been approved for assessment of microbial contamination on 
spacecraft surfaces 
Adenosine triphosphate (ATP) detection - this is a key element in cellular metabolism  This method is able to detect non cultivable organisms  It can also be triggered by non viable biological material so can give a "false positive" 
Limulus Amebocyte Lysate assay - detects lipopolysaccharides (LPS)  This compound is only present in Gram-negative bacteria  The standard assay analyses spores from microbes that are primarily Gram-positive, making it difficult to relate the two methods 

Impact prevention
This particularly applies to orbital missions, Category III, as they are sterilized to a lower standard than missions to the surface  It is also relevant to landers, as an impact gives more opportunity for forward contamination, and impact could be on an unplanned target, such as a special region on Mars 
The requirement for an orbital mission is that it needs to remain in orbit for at least 20 years after arrival at Mars with probability of at least 99% and for 50 years with probability at least 95%  This requirement can be dropped if the mission is sterilized to Viking sterilization standard In the Viking era (1970s), the requirement was given as a single figure, that any orbital mission should have a probability of less than 0 003% probability of impact during the current exploratory phase of exploration of Mars For both landers and orbiters, the technique of trajectory biasing is used during approach to the target  The spacecraft trajectory is designed so that if communications are lost, it will miss the target 

Issues with impact prevention
Despite these measures there has been one notable failure of impact prevention  The Mars Climate Orbiter which was sterilized only to Category III, crashed on Mars in 1999 due to a mix-up of imperial and metric units  The office of planetary protection stated that it is likely that it burnt up in the atmosphere, but if it survived to the ground, then it could cause forward contamination Mars Observer is another Category III mission with potential planetary contamination  Communications were lost three days before its orbital insertion maneuver in 1993  It seems most likely it did not succeed in entering into orbit around Mars and simply continued past on a heliocentric orbit  If it did succeed in following its automatic programming, and attempted the manoeuvre, however, there is a chance it crashed on Mars Three landers have had hard landings on Mars   These are Schiaparelli EDM lander, the Mars Polar Lander, and Deep Space 2  These were all sterilized for surface missions but not for special regions (Viking pre-sterilization only)  Mars Polar Lander, and Deep Space 2 crashed into the polar regions which are now treated as special regions because of the possibility of forming liquid brines 

Controversies
Meteorite argument
Alberto G  Fairén and Dirk Schulze-Makuch published an article in Nature recommending that planetary protection measures need to be scaled down  They gave as their main reason for this, that exchange of meteorites between Earth and Mars means that any life on Earth that could survive on Mars has already got there and vice versa Robert Zubrin used similar arguments in favour of his view that the back contamination risk has no scientific validity 

Rebuttal by NRC
The meteorite argument was examined by the NRC in the context of back contamination  It is thought that all the Martian meteorites originate in relatively few impacts every few million years on Mars  The impactors would be kilometers in diameter and the craters they form on Mars tens of kilometers in diameter  Models of impacts on Mars are consistent with these findings Earth receives a steady stream of meteorites from Mars, but they come from relatively few original impactors, and transfer was more likely in the early Solar System  Also some life forms viable on both Mars and on Earth might be unable to survive transfer on a meteorite, and there is so far no direct evidence of any transfer of life from Mars to Earth in this way 
The NRC concluded that though transfer is possible, the evidence from meteorite exchange does not eliminate the need for back contamination protection methods Impacts on Earth able to send microorganisms to Mars are also infrequent  Impactors of 10 km across or larger can send debris to Mars through the Earth's atmosphere but these occur rarely, and were more common in the early Solar System 

Proposal to end planetary protection for Mars
In their 2013 paper "The Over Protection of Mars", Alberto Fairén and Dirk Schulze-Makuch suggested that we no longer need to protect Mars, essentially using Zubrin's meteorite transfer argument  This was rebutted in a follow up article "Appropriate Protection of Mars", in Nature by the current and previous planetary protection officers Catharine Conley and John Rummel 

Critique of Category V containment measures
The scientific consensus is that the potential for large-scale effects, either through pathogenesis or ecological disruption, is extremely small  Nevertheless, returned samples from Mars will be treated as potentially biohazardous until scientists can determine that the returned samples are safe  The goal is to reduce the probability of release of a Mars particle to less than one in a million 

Policy proposals
Non-biological contamination
A COSPAR workshop in 2010, looked at issues to do with protecting areas from non biological contamination  They recommended that COSPAR expand its remit to include such issues  Recommendations of the workshop include:

Recommendation 3 COSPAR should add a separate and parallel policy to provide guidance on requirements/best practices for protection of non-living/nonlife-related aspects of Outer Space and celestial bodies
Some ideas proposed include protected special regions, or "Planetary Parks" to keep regions of the Solar System pristine for future scientific investigation, and also for ethical reasons 

Proposed extensions
Astrobiologist Christopher McKay has argued that until we have better understanding of Mars, our explorations should be biologically reversible  For instance if all the microorganisms introduced to Mars so far remain dormant within the spacecraft, they could in principle be removed in the future, leaving Mars completely free of contamination from modern Earth lifeforms 
In the 2010 workshop one of the recommendations for future consideration was to extend the period for contamination prevention to the maximum viable lifetime of dormant microorganisms introduced to the planet 

"'Recommendation 4 ' COSPAR should consider that the appropriate protection of potential indigenous extraterrestrial life shall include avoiding the harmful contamination of any habitable environment —whether extant or foreseeable— within the maximum potential time of viability of any terrestrial organisms (including microbial spores) that may be introduced into that environment by human or robotic activity "
In the case of Europa, a similar idea has been suggested, that it is not enough to keep it free from contamination during our current exploration period  It might be that Europa is of sufficient scientific interest that the human race has a duty to keep it pristine for future generations to study as well  This was the majority view of the 2000 task force examining Europa, though there was a minority view of the same task force that such strong protection measures are not required 

"One consequence of this view is that Europa must be protected from contamination for an open-ended period, until it can be demonstrated that no ocean exists or that no organisms are present  Thus, we need to be concerned that over a time scale on the order of 10 million to 100 million years (an approximate age for the surface of Europa), any contaminating material is likely to be carried into the deep ice crust or into the underlying ocean "
In July 2018, the National Academies of Sciences, Engineering, and Medicine issued a Review and Assessment of Planetary Protection Policy Development Processes  In part, the report urges NASA to create a broad strategic plan that covers both forward and back contamination  The report also expresses concern about private industry missions, for which there is no governmental regulatory authority 

Protecting objects beyond the Solar System
The proposal by the German physicist Claudius Gros, that the technology of the Breakthrough Starshot project may be utilized to establish a biosphere of unicellular organisms on otherwise only transiently habitable exoplanets, has sparked a discussion, to what extent planetary protection should be extended to exoplanets  Gros argues that the extended timescales of
interstellar missions imply that planetary and exoplanetary protection have different ethical groundings 

See also
Astrobiology – Science concerned with life in the universe
ExoMars – Astrobiology programme
List of microorganisms tested in outer space
Mars 2020 – Astrobiology Mars rover mission by NASA
Panspermia – Hypothesis on the interstellar spreading of primordial life
Passage 3:
Transit (astronomy)
In astronomy, a transit (or astronomical transit) is a phenomenon when a celestial body passes directly between a larger body and the observer  As viewed from a particular vantage point, the transiting body appears to move across the face of the larger body, covering a small portion of it The word "transit" refers to cases where the nearer object appears smaller than the more distant object  Cases where the nearer object appears larger and completely hides the more distant object are known as occultations 
However, the probability of seeing a transiting planet is low because it is dependent on the alignment of the three objects in a nearly perfectly straight line  Many parameters of  a planet and its parent star can be determined based on the transit 

In the Solar System
One example of a transit involves the motion of a planet between a terrestrial observer and the Sun  This can happen only with inferior planets, namely Mercury and Venus (see transit of Mercury and transit of Venus)  However, because a transit is dependent on the point of observation, the Earth itself transits the Sun if observed from Mars  In the solar transit by the Moon captured during calibration of the STEREO B spacecraft's ultraviolet imaging, the Moon appears much smaller than it does when seen from Earth, because the spacecraft–Moon separation was several times greater than the Earth–Moon distance 
The term can also be used to describe the motion of a satellite across its parent planet, for instance one of the Galilean satellites (Io, Europa, Ganymede, Callisto) across Jupiter, as seen from Earth 
Although rare, cases where four bodies are lined up do happen  One of these events occurred on 27 June 1586, when Mercury transited the Sun as seen from Venus at the same time as a transit of Mercury from Saturn and a transit of Venus from Saturn 

Notable observations
No missions were planned to coincide with the transit of Earth visible from Mars on 11 May 1984 and the Viking missions had been terminated a year previously  Consequently, the next opportunity to observe such an alignment will be in 2084 
On 21 December 2012, the Cassini–Huygens probe, in orbit around Saturn, observed the planet Venus transiting the Sun On 3 June 2014, the Mars rover Curiosity observed the planet Mercury transiting the Sun, marking the first time a planetary transit has been observed from a celestial body besides Earth 

Mutual planetary transits
In rare cases, one planet can pass in front of another  If the nearer planet appears smaller than the more distant one, the event is called a mutual planetary transit 

Outside the Solar System
Exoplanet Detection

The transit method can be used to discover exoplanets  As a planet eclipses/transits its host star it will block a portion of the light from the star  If the planet transits in-between the star and the observer the change in light can be measured to construct a light curve  Light curves are measured with a charge-coupled device  The light curve of a star can disclose several physical characteristics of the planet and star, such as density  Multiple transit events must be measured to determine the characteristics which tend to occur at regular intervals  Multiple planets orbiting the same host star can cause transit-timing variations (TTV)  TTV is caused by the gravitational forces of all orbiting bodies acting upon each other  The probability of seeing a transit from Earth is low, however  The probability is given by the following equation 

  
    
      
        
          P
          
            transit
          
        
        =
        (
        
          R
          
            star
          
        
        +
        
          R
          
            planet
          
        
        )
        
          /
        
        a
        ,
      
    
    {\displaystyle P_{\text{transit}}=(R_{\text{star}}+R_{\text{planet}})/a,}
  where Rstar and Rplanet are the radius of the star and planet, respectively, and a is the semi-major axis  Because of the low probability of a transit in any specific system, large selections of the sky must be regularly observed in order to see a transit  Hot Jupiters are more likely to be seen because of their larger radius and short semi-major axis  In order to find Earth-sized planets, red dwarf stars are observed because of their small radius  Even though transiting has a low probability it has proven itself to be a good technique for discovering exoplanets 
In recent years, the discovery of extrasolar planets has prompted interest in the possibility of detecting their transits across their own stellar primaries  HD 209458b was the first such transiting planet to be detected 
The transit of celestial objects is one of the few key phenomena used today for the study of exoplanetary systems  Today, transit photometry is the leading form of exoplanet discovery  As an exoplanet moves in front of its host star there is a dimming in the luminosity of the host star that can be measured  Larger planets make the dip in luminosity more noticeable and easier to detect  Followup observations using other methods are often carried out to ensure it is a planet 
There are currently (December 2018) 2345 planets confirmed with Kepler light curves for stellar host 

Contacts
During a transit there are four "contacts", when the circumference of the small circle (small body disk) touches the circumference of the large circle (large body disk) at a single point   Historically, measuring the precise time of each point of contact was one of the most accurate ways to determine the positions of astronomical bodies   The contacts happen in the following order:

First contact: the smaller body is entirely outside the larger body, moving inward ("exterior ingress")
Second contact: the smaller body is entirely inside the larger body, moving further inward ("interior ingress")
Third contact: the smaller body is entirely inside the larger body, moving outward ("interior egress")
Fourth contact: the smaller body is entirely outside the larger body, moving outward ("exterior egress")A fifth named point is that of greatest transit, when the apparent centers of the two bodies are nearest to each other, halfway through the transit 

Missions
Since transit photometry allows for scanning large celestial areas with a simple procedure, it has been the most popular and successful form of finding exoplanets in the past decade and includes many projects, some of which have already been retired, others in use today, and some in progress of being planned and created  The most successful projects include HATNet, KELT, Kepler, and WASP, and some new and developmental stage missions such as TESS, HATPI, and others which can be found among the List of Exoplanet Search Projects 

HATNet
HATNet Project is a set of northern telescopes in Fred Lawrence Whipple Observatory, Arizona and Mauna Kea Observatories, HI, and southern telescopes around the globe, in Africa, Australia, and South America, under the HATSouth branch of the project  These are small aperture telescopes, just like KELT, and look at a wide field which allows them to scan a large area of the sky for possible transiting planets  In addition, their multitude and spread around the world allows for 24/7 observation of the sky so that more short-period transits can be caught A third sub-project, HATPI, is currently under construction and will survey most of the night sky seen from its location in Chile 

KELT
KELT is a terrestrial telescope mission designed to search for transiting systems of planets of magnitude 8<M<10  It began operation in October 2004 in Winer Observatory and has a southern companion telescope added in 2009  KELT North observes "26-degree wide strip of sky that is overhead from North America during the year", while KELT South observes single target areas of the size 26 by 26 degrees  Both telescopes can detect and identify transit events as small as a 1% flux dip, which allows for detection of planetary systems similar to those in our planetary system 

Kepler / K2
The Kepler satellite served the Kepler mission between 7 March 2009 and 11 May 2013, where it observed one part of the sky in search of transiting planets within a 115 square degrees of the sky around the Cygnus, Lyra, and Draco constellations  After that, the satellite continued operating until 15 November 2018, this time changing its field along the ecliptic to a new area roughly every 75 days due to reaction wheel failure 

TESS
TESS was launched on 18 April 2018, and is planned to survey most of the sky by observing it strips defined along the right ascension lines for 27 days each  Each area surveyed is 27 by 90 degrees  Because of the positioning of sections, the area near TESS's rotational axis will be surveyed for up to 1 year, allowing for the identification of planetary systems with longer orbital periods 

See also
Eclipse
Kepler Mission
Occultation
Syzygy (astronomy)
Conjunction (astronomy)
Opposition (planets)
Transit of asteroids
Transit of Deimos from Mars
Transit of Phobos from Mars
Transit of Vulcan
Transit of Mercury from Mars
Transit of Earth from Mars
Passage 4:
Roche limit
In celestial mechanics, the Roche limit, also called Roche radius, is the distance from a celestial body within which a second celestial body, held together only by its own force of gravity, will disintegrate because the first body's tidal forces exceed the second body's self-gravitation  Inside the Roche limit, orbiting material disperses and forms rings, whereas outside the limit, material tends to coalesce  The Roche radius depends on the radius of the first body and on the ratio of the bodies' densities 
The term is named after Édouard Roche (French: [ʁɔʃ], English:  ROSH), the French astronomer who first calculated this theoretical limit in 1848 

Explanation
The Roche limit typically applies to a satellite's disintegrating due to tidal forces induced by its primary, the body around which it orbits  Parts of the satellite that are closer to the primary are attracted more strongly by gravity from the primary than parts that are farther away; this disparity effectively pulls the near and far parts of the satellite apart from each other, and if the disparity (combined with any centrifugal effects due to the object's spin) is larger than the force of gravity holding the satellite together, it can pull the satellite apart  Some real satellites, both natural and artificial, can orbit within their Roche limits because they are held together by forces other than gravitation  Objects resting on the surface of such a satellite would be lifted away by tidal forces  A weaker satellite, such as a comet, could be broken up when it passes within its Roche limit 
Since, within the Roche limit, tidal forces overwhelm the gravitational forces that might otherwise hold the satellite together, no satellite can gravitationally coalesce out of smaller particles within that limit  Indeed, almost all known planetary rings are located within their Roche limit  (Notable exceptions are Saturn's E-Ring and Phoebe ring  These two rings could possibly be remnants from the planet's proto-planetary accretion disc that failed to coalesce into moonlets, or conversely have formed when a moon passed within its Roche limit and broke apart )
The Roche limit is not the only factor that causes comets to break apart  Splitting by thermal stress, internal gas pressure and rotational splitting are other ways for a comet to split under stress 

Determination
The limiting distance to which a satellite can approach without breaking up depends on the rigidity of the satellite  At one extreme, a completely rigid satellite will maintain its shape until tidal forces break it apart  At the other extreme, a highly fluid satellite gradually deforms leading to increased tidal forces, causing the satellite to elongate, further compounding the tidal forces and causing it to break apart more readily 
Most real satellites would lie somewhere between these two extremes, with tensile strength rendering the satellite neither perfectly rigid nor perfectly fluid  For example, a rubble-pile asteroid will behave more like a fluid than a solid rocky one; an icy body will behave quite rigidly at first but become more fluid as tidal heating accumulates and its ices begin to melt 
But note that, as defined above, the Roche limit refers to a body held together solely by the gravitational forces which cause otherwise unconnected particles to coalesce, thus forming the body in question  The Roche limit is also usually calculated for the case of a circular orbit, although it is straightforward to modify the calculation to apply to the case (for example) of a body passing the primary on a parabolic or hyperbolic trajectory 

Rigid satellites
The rigid-body Roche limit is a simplified calculation for a spherical satellite  Irregular shapes such as those of tidal deformation on the body or the primary it orbits are neglected  It is assumed to be in hydrostatic equilibrium  These assumptions, although unrealistic, greatly simplify calculations 
The Roche limit for a rigid spherical satellite is the distance, 
  
    
      
        d
      
    
    {\displaystyle d}
  , from the primary at which the gravitational force on a test mass at the surface of the object is exactly equal to the tidal force pulling the mass away from the object:

  
    
      
        d
        =
        
          R
          
            M
          
        
        
          
            (
            
              2
              
                
                  
                    ρ
                    
                      M
                    
                  
                  
                    ρ
                    
                      m
                    
                  
                
              
            
            )
          
          
            
              1
              3
            
          
        
      
    
    {\displaystyle d=R_{M}\left(2{\frac {\rho _{M}}{\rho _{m}}}\right)^{\frac {1}{3}}}
  where 
  
    
      
        
          R
          
            M
          
        
      
    
    {\displaystyle R_{M}}
   is the radius of the primary, 
  
    
      
        
          ρ
          
            M
          
        
      
    
    {\displaystyle \rho _{M}}
   is the density of the primary, and 
  
    
      
        
          ρ
          
            m
          
        
      
    
    {\displaystyle \rho _{m}}
   is the density of the satellite  This can be equivalently written as

  
    
      
        d
        =
        
          R
          
            m
          
        
        
          
            (
            
              2
              
                
                  
                    M
                    
                      M
                    
                  
                  
                    M
                    
                      m
                    
                  
                
              
            
            )
          
          
            
              1
              3
            
          
        
      
    
    {\displaystyle d=R_{m}\left(2{\frac {M_{M}}{M_{m}}}\right)^{\frac {1}{3}}}
  where 
  
    
      
        
          R
          
            m
          
        
      
    
    {\displaystyle R_{m}}
   is the radius of the secondary, 
  
    
      
        
          M
          
            M
          
        
      
    
    {\displaystyle M_{M}}
   is the mass of the primary, and 
  
    
      
        
          M
          
            m
          
        
      
    
    {\displaystyle M_{m}}
   is the mass of the secondary 
This does not depend on the size of the objects, but on the ratio of densities  This is the orbital distance inside of which loose material (e g  regolith) on the surface of the satellite closest to the primary would be pulled away, and likewise material on the side opposite the primary will also go away from, rather than toward, the satellite 

Fluid satellites
A more accurate approach for calculating the Roche limit takes the deformation of the satellite into account  An extreme example would be a tidally locked liquid satellite orbiting a planet, where any force acting upon the satellite would deform it into a prolate spheroid 
The calculation is complex and its result cannot be represented in an exact algebraic formula  Roche himself derived the following approximate solution for the Roche limit:

  
    
      
        d
        ≈
        2 44
        R
        
          
            (
            
              
                
                  ρ
                  
                    M
                  
                
                
                  ρ
                  
                    m
                  
                
              
            
            )
          
          
            1
            
              /
            
            3
          
        
      
    
    {\displaystyle d\approx 2 44R\left({\frac {\rho _{M}}{\rho _{m}}}\right)^{1/3}}
  However, a better approximation that takes into account the primary's oblateness and the satellite's mass is:

  
    
      
        d
        ≈
        2 423
        R
        
          
            (
            
              
                
                  ρ
                  
                    M
                  
                
                
                  ρ
                  
                    m
                  
                
              
            
            )
          
          
            1
            
              /
            
            3
          
        
        
          
            (
            
              
                
                  (
                  1
                  +
                  
                    
                      m
                      
                        3
                        M
                      
                    
                  
                  )
                  +
                  
                    
                      c
                      
                        3
                        R
                      
                    
                  
                  (
                  1
                  +
                  
                    
                      m
                      M
                    
                  
                  )
                
                
                  1
                  −
                  c
                  
                    /
                  
                  R
                
              
            
            )
          
          
            1
            
              /
            
            3
          
        
      
    
    {\displaystyle d\approx 2 423R\left({\frac {\rho _{M}}{\rho _{m}}}\right)^{1/3}\left({\frac {(1+{\frac {m}{3M}})+{\frac {c}{3R}}(1+{\frac {m}{M}})}{1-c/R}}\right)^{1/3}}
  where 
  
    
      
        c
        
          /
        
        R
      
    
    {\displaystyle c/R}
   is the oblateness of the primary  The numerical factor is calculated with the aid of a computer 
The fluid solution is appropriate for bodies that are only loosely held together, such as a comet  For instance, comet Shoemaker–Levy 9's decaying orbit around Jupiter passed within its Roche limit in July 1992, causing it to fragment into a number of smaller pieces  On its next approach in 1994 the fragments crashed into the planet  Shoemaker–Levy 9 was first observed in 1993, but its orbit indicated that it had been captured by Jupiter a few decades prior 

See also
Roche lobe
Chandrasekhar limit
Hill sphere
Spaghettification (the extreme case of tidal distortion)
Black hole
Triton (moon) (Neptune's satellite)
Comet Shoemaker–Levy 9
Passage 5:
Ulysses (spacecraft)
Ulysses ( yoo-LISS-eez, UK also  YOO-liss-eez) was a robotic space probe whose primary mission was to orbit the Sun and study it at all latitudes  It was launched in 1990 and made three "fast latitude scans" of the Sun in 1994/1995, 2000/2001, and 2007/2008  In addition, the probe studied several comets  Ulysses was a joint venture of the European Space Agency (ESA) and the United States' National Aeronautics and Space Administration (NASA), under leadership of ESA with participation from Canada's National Research Council  The last day for mission operations on Ulysses was 30 June 2009 To study the Sun at all latitudes, the probe needed to change its orbital inclination and leave the plane of the Solar System  To change the orbital inclination of a spacecraft to about 80° requires a large change in heliocentric velocity, the energy to achieve which far exceeded the capabilities of any launch vehicle  To reach the desired orbit around the Sun, the mission's planners chose a gravity assist maneuver around Jupiter, but this Jupiter encounter meant that Ulysses could not be powered by solar cells  The probe was powered instead by a radioisotope thermoelectric generator (RTG) 
The spacecraft was originally named Odysseus, because of its lengthy and indirect trajectory to study the solar poles  It was renamed Ulysses, the Latin translation of "Odysseus", at ESA's request in honor not only of Homer's mythological hero but also of Dante's character in the Inferno  Ulysses was originally scheduled for launch in May 1986 aboard the Space Shuttle Challenger on STS-61-F  Due to the 28 January 1986 loss of Challenger, the launch of Ulysses was delayed until 6 October 1990 aboard Discovery (mission STS-41) 

Spacecraft
The spacecraft was designed by ESA and built by Dornier Systems, a German aircraft manufacturer  The body was roughly a box, approximately 3 2 m × 3 3 m × 2 1 m (10 5 ft × 10 8 ft × 6 9 ft) in size  The box mounted the 1 65 m (5 ft 5 in) dish antenna and the GPHS-RTG radioisotope thermoelectric generator (RTG) power source  The box was divided into noisy and quiet sections  The noisy section abutted the RTG; the quiet section housed the instrument electronics  Particularly "loud" components, such as the preamps for the radio dipole, were mounted outside the structure entirely, and the box acted as a Faraday cage 
Ulysses was spin-stabilised about its z-axis which roughly coincides with the axis of the dish antenna  The RTG, whip antennas, and instrument boom were placed to stabilize this axis, with the spin rate nominally at 5 rpm  Inside the body was a hydrazine fuel tank  Hydrazine monopropellant was used for course corrections inbound to Jupiter, and later used exclusively to repoint the spin axis (and thus, the antenna) at Earth  The spacecraft was controlled by eight thrusters in two blocks  Thrusters were pulsed in the time domain to perform rotation or translation  Four sun sensors detected orientation  For fine attitude control, the S-band antenna feed was mounted slightly off-axis  This offset feed combined with the spacecraft spin introduced an apparent oscillation to a radio signal transmitted from Earth when received on board the spacecraft  The amplitude and phase of this oscillation were proportional to the orientation of the spin axis relative to the Earth direction  This method of determining the relative orientation is called conical scanning and was used by early radars for automated tracking of targets and was also very common in early infrared guided missiles 
The spacecraft used S-band for uplinked commands and downlinked telemetry, through dual redundant 5-watt transceivers  The spacecraft used X-band for science return (downlink only), using dual 20 watts TWTAs until the failure of the last remaining TWTA in January 2008  Both bands used the dish antenna with prime-focus feeds, unlike the Cassegrain feeds of most other spacecraft dishes 
Dual tape recorders, each of approximately 45-megabit capacity, stored science data between the nominal eight-hour communications sessions during the prime and extended mission phases 
The spacecraft was designed to withstand both the heat of the inner Solar System and the cold at Jupiter's distance  Extensive blanketing and electric heaters protected the probe against the cold temperatures of the outer Solar System 
Multiple computer systems (CPUs/microprocessors/Data Processing Units) are used in several of the scientific instruments, including several radiation-hardened RCA CDP1802 microprocessors  Documented 1802 usage includes dual-redundant 1802s in the COSPIN, and at least one 1802 each in the GRB, HI-SCALE, SWICS, SWOOPS and URAP instruments, with other possible microprocessors incorporated elsewhere Total mass at launch was 371 kg (818 lb), of which 33 5 kg was hydrazine propellant used for attitude control and orbit correction 

Instruments
The twelve different Instruments came from ESA and NASA  The first design was based on two probes, one by NASA and one by ESA, but the probe of NASA was defunded and in the end the instruments of the cancelled probe were mounted on Ulyssses 
Radio/Plasma antennas: Two beryllium copper antennas were unreeled outwards from the body, perpendicular to the RTG and spin axis  Together this dipole spanned 72 meters (236 2 ft)  A third antenna, of hollow beryllium copper, was deployed from the body, along the spin axis opposite the dish  It was a monopole antenna, 7 5 meters (24 6 ft) long  These measured radio waves generated by plasma releases, or the plasma itself as it passed over the spacecraft  This receiver ensemble was sensitive from DC to 1 MHz 
Experiment Boom: A third type of boom, shorter and much more rigid, extended from the last side of the spacecraft, opposite the RTG  This was a hollow carbon-fiber tube, of 50 mm (2 in ) diameter  It can be seen in the photo as the silver rod stowed alongside the body  It carried four types of instruments: a solid-state X-ray instrument, composed of two silicon detectors, to study X-rays from solar flares and Jupiter's aurorae; the Gamma-Ray Burst experiment, consisting of two CsI scintillator crystals with photomultipliers; two different magnetometers, a helium vector magnetometer and a fluxgate magnetometer; and a two-axis magnetic search coil antenna measured AC magnetic fields 
Body-Mounted Instruments: Detectors for electrons, ions, neutral gas, dust, and cosmic rays were mounted on the spacecraft body around the quiet section 
Lastly, the radio communications link could be used to search for gravitational waves (through Doppler shifts) and to probe the Sun's atmosphere through radio occultation  No gravitational waves were detected 
Total instrument mass was 55 kg 
Magnetometer (MAG): MAG measured the magnetic field in the heliosphere  Measurements of Jupiter's magnetic field were also performed 
Solar Wind Plasma Experiment (SWOOPS): detected the solar wind at all solar distances and latitudes and in three dimensions  It measured positive ions and electrons 
Solar Wind Ion Composition Instrument (SWICS): determined composition, temperature and speed of the atoms and ions that comprise the solar wind 
Unified Radio and Plasma Wave Instrument (URAP): picked up radio waves from the Sun and electromagnetic waves generated in the solar wind close to the spacecraft 
Energetic Particle Instrument (EPAC) and GAS: EPAC investigated the energy, fluxes and distribution of energetic particles in the heliosphere  GAS studied the uncharged gases (helium) of interstellar origin 
Low-Energy Ion and Electron Experiment (HI-SCALE): investigated the energy, fluxes and distribution of energetic particles in the heliosphere 
Cosmic Ray and Solar Particle Instrument (COSPIN): investigated the energy, fluxes and distribution of energetic particles and galactic cosmic rays in the heliosphere 
Solar X-ray and Cosmic Gamma-Ray Burst Instrument (GRB): studied cosmic gamma ray bursts and X-rays from solar flares 
Dust Experiment (DUST): Direct measurements of interplanetary and interstellar dust grains to investigate their properties as functions of the distance from the Sun and solar latitude 

Mission
Planning
Until Ulysses, the Sun had only been observed from low solar latitudes  The Earth's orbit defines the ecliptic plane, which differs from the Sun's equatorial plane by only 7 25°  Even spacecraft directly orbiting the Sun do so in planes close to the ecliptic because a direct launch into a high-inclination solar orbit would require a prohibitively large launch vehicle 
Several spacecraft (Mariner 10, Pioneer 11, and Voyagers 1 and 2) had performed gravity assist maneuvers in the 1970s  Those maneuvers were to reach other planets also orbiting close to the ecliptic, so they were mostly in-plane changes  However, gravity assists are not limited to in-plane maneuvers; a suitable flyby of Jupiter could produce a significant plane change  An Out-Of-The-Ecliptic mission (OOE) was thereby proposed  See article Pioneer H 
Originally, two spacecraft were to be built by NASA and ESA, as the International Solar Polar Mission  One would be sent over Jupiter, then under the Sun  The other would fly under Jupiter, then over the Sun  This would provide simultaneous coverage  Due to cutbacks, the U S  spacecraft was cancelled in 1981  One spacecraft was designed, and the project recast as Ulysses, due to the indirect and untried flight path  NASA would provide the Radioisotope Thermoelectric Generator (RTG) and launch services, ESA would build the spacecraft assigned to Astrium GmbH, Friedrichshafen, Germany (formerly Dornier Systems)  The instruments would be split into teams from universities and research institutes in Europe and the United States  This process provided the 12 instruments on board 
The changes delayed launch from February 1983 to May 1986 when it was to be deployed by the Space Shuttle Challenger (boosted by the proposed Centaur G Prime upper stage  However, the Challenger disaster forced a two-and-a-half year stand down of the shuttle fleet, mandated the cancellation of the Centaur-G upper stage, and pushed the launch date to October 1990 

Launch
Ulysses was deployed into low Earth orbit from the Space Shuttle Discovery  From there, it was propelled on a trajectory to Jupiter by a combination of solid rocket motors  This upper stage consisted of a two-stage Boeing IUS (Inertial Upper Stage), plus a McDonnell Douglas PAM-S (Payload Assist Module-Special)  The IUS was inertially stabilised and actively guided during its burn  The PAM-S was unguided and it and Ulysses were spun up to 80 rpm for stability at the start of its burn  On burnout of the PAM-S, the motor and spacecraft stack was yo-yo de-spun (weights deployed at the end of cables) to below 8 rpm prior to separation of the spacecraft  On leaving Earth, the spacecraft became the fastest ever artificially-accelerated spacecraft, and held that title until the New Horizons probe was launched 
On its way to Jupiter, the spacecraft was in an elliptical non-Hohmann transfer orbit  At this time, Ulysses had a low orbital inclination to the ecliptic 

Jupiter swing-by
It arrived at Jupiter on 8 February 1992 for a swing-by maneuver that increased its inclination to the ecliptic by 80 2°  The giant planet's gravity bent the spacecraft's flight path southward and away from the ecliptic plane  This put it into a final orbit around the Sun that would take it past the Sun's north and south poles  The size and shape of the orbit were adjusted to a much smaller degree so that aphelion remained at approximately 5 AU, Jupiter's distance from the Sun, and perihelion was somewhat greater than 1 AU, the Earth's distance from the Sun  The orbital period is approximately six years 

Polar regions of the Sun
Between 1994 and 1995 it explored both the southern and northern polar regions of the Sun, respectively 

Comet C/1996 B2 (Hyakutake)
On 1 May 1996, the spacecraft unexpectedly crossed the ion tail of Comet Hyakutake (C/1996 B2), revealing the tail to be at least 3 8 AU in length 

Comet C/1999 T1 (McNaught–Hartley)
An encounter with a comet tail happened again in 2004  when Ulysses flew through the ion tailings of C/1999 T1 (McNaught-Hartley)  A coronal mass ejection carried the cometary material to Ulysses 

Second Jupiter encounter
Ulysses approached aphelion in 2003/2004 and made further distant observations of Jupiter 

Comet C/2006 P1 (McNaught)
In 2007, Ulysses passed through the tail of comet C/2006 P1 (McNaught)  The results were surprisingly different from its pass through Hyakutake's tail, with the measured solar wind velocity dropping from approximately 700 kilometers per second (1,566,000 mph) to less than 400 kilometers per second (895,000 mph) 

Extended mission
ESA's Science Program Committee approved the fourth extension of the Ulysses mission to March 2004  thereby allowing it to operate over the Sun's poles for the third time in 2007 and 2008  After it became clear that the power output from the spacecraft's RTG would be insufficient to operate science instruments and keep the attitude control fuel, hydrazine, from freezing, instrument power sharing was initiated  Up until then, the most important instruments had been kept online constantly, whilst others were deactivated  When the probe neared the Sun, its power-hungry heaters were turned off and all instruments were turned on On 22 February 2008, 17 years and 4 months after the launch of the spacecraft, ESA and NASA announced that the mission operations for Ulysses would likely cease within a few months  On 12 April 2008, NASA announced that the end date will be 1 July 2008 The spacecraft operated successfully for over four times its design life  A component within the last remaining working chain of X-band downlink subsystem failed on 15 January 2008  The other chain in the X-band subsystem had previously failed in 2003 Downlink to Earth resumed on S-band, but the beamwidth of the high gain antenna in the S-band was not as narrow as in the X–band, so that the received downlink signal was much weaker, hence reducing the achievable data rate  As the spacecraft traveled on its outbound trajectory to the orbit of Jupiter, the downlink signal would have eventually fallen below the receiving capability of even the largest antennas (70 meters - 229 7 feet - in diameter) of the Deep Space Network 
Even before the downlink signal was lost due to distance, the hydrazine attitude control fuel on board the spacecraft was considered likely to freeze, as the radioisotope thermal generators (RTGs) failed to generate enough power for the heaters to overcome radiative heat loss into space  Once the hydrazine froze, the spacecraft would no longer be able to maneuver to keep its high gain antenna pointing towards Earth, and the downlink signal would then be lost in a matter of days  The failure of the X-band communications subsystem hastened this, because the coldest part of the fuel pipework was routed over the X-band traveling-wave tube amplifiers, because they generated enough heat during operation to keep the propellant plumbing warm 
The previously announced mission end date of 1 July 2008, came and went but mission operations continued albeit in a reduced capacity  The availability of science data gathering was limited to only when Ulysses was in contact with a ground station due to the deteriorating S-band downlink margin no longer being able to support simultaneous real-time data and tape recorder playback  When the spacecraft was out of contact with a ground station, the S-band transmitter was switched off and the power was diverted to the internal heaters to add to the warming of the hydrazine  On 30 June 2009, ground controllers sent commands to switch to the low gain antennas  This stopped communications with the spacecraft, in combination with previous commands to shut down its transmitter entirely 

Results
During cruise phases, Ulysses provided unique data  As the only spacecraft out of the ecliptic with a gamma-ray instrument, Ulysses was an important part of the InterPlanetary Network (IPN)  The IPN detects gamma ray bursts (GRBs); since gamma rays cannot be focused with mirrors, it was very difficult to locate GRBs with enough accuracy to study them further  Instead, several spacecraft can locate the burst through multilateration  Each spacecraft has a gamma-ray detector, with readouts noted in tiny fractions of a second  By comparing the arrival times of gamma showers with the separations of the spacecraft, a location can be determined, for follow-up with other telescopes  Because gamma rays travel at the speed of light, wide separations are needed  Typically, a determination came from comparing: one of several spacecraft orbiting the Earth, an inner-Solar-system probe (to Mars, Venus, or an asteroid), and Ulysses  When Ulysses crossed the ecliptic twice per orbit, many GRB determinations lost accuracy 
Additional discoveries:
Data provided by Ulysses led to the discovery that the Sun's magnetic field interacts with the Solar System in a more complex fashion than previously assumed 
Data provided by Ulysses led to the discovery that dust coming into the Solar System from deep space was 30 times more abundant than previously expected 
In 2007–2008 data provided by Ulysses led to the determination that the magnetic field emanating from the Sun's poles is much weaker than previously observed 
That the solar wind has "grown progressively weaker during the mission and is currently at its weakest since the start of the Space Age" 

Fate
Ulysses will most likely continue in heliocentric orbit around the Sun indefinitely  However, there is a chance that in one of its re-encounters with Jupiter a close fly-by with one of the Jovian moons would be enough to alter its course and so the probe would enter a hyperbolic trajectory around the Sun and leave the Solar System 

See also
Advanced Composition Explorer – NASA satellite of the Explorer program
List of heliophysics missions
List of missions to the outer planets
Parker Solar Probe – NASA robotic space probe of the outer corona of the Sun
Solar and Heliospheric Observatory – European space observatory
STEREO – Solar observation mission (2006–present)
TRACE – NASA satellite of the Explorer program
WIND – NASA probe to study solar wind, at L1 since 1995
Solar Orbiter – European space-based solar observatory
Context 2: Passage 1:
Sabal Trail Transmission Pipeline
Sabal Trail Transmission Pipeline is a natural gas pipeline that runs from central Alabama through southwest Georgia to Orange County, Florida  A minority stake in the venture is owned by NextEra Energy and Duke Energy  The pipeline has been being planned since before 2011  In July 2013 it was announced that Florida Power & Light Company (FPL) jointly awarded its parent corporation, NextEra Energy and Spectra Energy the bid to build the pipeline  In May 2015, Duke Energy bought an interest in the venture  Construction began in September 2016  The pipeline is currently scheduled to be in service by June 2017 

Environmental concerns and federal agency permission
The construction of the pipeline has drawn concern from the communities through which it is planned to be built  Protests in Albany, Georgia and Valdosta, Georgia have occurred in response to the plans to build the pipelines  The threat of eminent domain and the environmental impact are among the concerns that have been voiced by citizens 
In late October 2015, the United States Environmental Protection Agency recommended to Federal Energy Regulatory Commission that the pipeline be rerouted away from the Floridan aquifer because of the karst geology that is prone to sinkholes and also contains wetlands Environmental concerns have also been raised regarding threats to endangered species habitat along the route including crocodile, manatee and sea turtle breeding and nesting grounds  Others including Sanford Bishop, Hank Johnson, David Scott and John Lewis have voiced concern over the construction of a proposed compressor station near an already disadvantaged African American community in Albany, Georgia Despite the recommendations of Environmental Protection Agency, the Federal Energy Regulatory Commission approved the pipeline's route in February 2016  In August 2016, the Army Corps of Engineers approved the route through North Florida  Some citizens from the areas of the route continued to voice concerns about the environmental impact the pipeline would have the environment after it was approved by the various governmental agencies 
The federal permits require the companies constructing the pipeline to engage in mitigation banking 

Protests
The construction of the Sabal Trail resulted in extensive protests from environmentalists  On November 12, 2016, fourteen protesters were arrested at a pipeline construction site in Gilchrist County, Florida after one protester locked himself to truck on site and the others obstructed its path  They had been inspired by the Dakota Access Pipeline protests and used similar protest signage  In February of 2017, two protestors locked themselves inside a section of the pipeline, citing the danger to people and the environment which would result from a pipeline leak  On February 26, 2017 an apparent protester was seen firing a high powered rifle at the pipeline construction site  The man fled and was chased by police until he crashed and was killed by a deputy after he tried to engage police in a gunfight

Construction
In September 2016, construction began on the pipeline  
In late October 2016, drilling mud seepage began leaking into the Withlacoochee River at construction along the border of Brooks County, Georgia and Lowndes County, Georgia from a pilot hole that had been drilled underneath the river in preparation for the horizontal directional drilling hole  After the leakage was discovered, the Sabal Company installed containment booms at the site and posted a vacuum truck to capture the mud seepage  The spill prompted protests from concerned local citizens on November 16, 2016 As part of the company's biweekly report for the week ending on November 27 to the Federal Energy Regulatory Commission, it was reported that a sinkhole had developed 165 feet (50 m) southeast of the horizontal directional drilling (HDD) hole exit point at the work site near the Withlacoochee River  The sinkhole had been identified on November 5 by workers in the field 

Owners
Spectra Energy
NextEra Energy
Duke Energy (7 5%)

See also
Spectra Energy
Passage 2:
Duke Energy
Duke Energy Corporation is an American electric power and natural gas holding company headquartered in Charlotte, North Carolina 

Overview
Based in Charlotte, North Carolina, Duke Energy owns 58,200 megawatts of base-load and peak generation in the United States, which it distributes to its 7 2 million customers  The company has approximately 29,000 employees  Duke Energy's service territory covers 104,000 square miles (270,000 km2) with 250,200 miles (402,700 km) of distribution lines  Almost all of Duke Energy's Midwest generation comes from coal, natural gas, or oil, while half of its Carolinas generation comes from its nuclear power plants  During 2006, Duke Energy generated 148,798,332 megawatt-hours of electrical energy 
Duke Energy Renewable Services (DERS), a subsidiary of Duke Energy, specializes in the development, ownership, and operation of various generation facilities throughout the United States  This segment of the company operates 1,700 megawatts of generation  240 megawatts of wind generation were under construction and 1,500 additional megawatts of wind generation were in planning stages  On September 9, 2008, DERS updated its projections for future wind power capacity  By the end of 2008, it would have over 500 MW of nameplate capacity of wind power online, and an additional 5,000 MW in development 

Subsidiaries
Duke Energy Carolinas (formerly Duke Power)
Duke Energy Ohio (formerly Cincinnati Gas & Electric Company, via Cinergy)
Duke Energy Kentucky (formerly Union Light, Heat & Power, via Cinergy)
Duke Energy Indiana (formerly Public Service Indiana, via Cinergy)
Duke Energy Florida (formerly Florida Power Corporation, via Progress Energy)
Duke Energy Progress (formerly Carolina Power and Light, via Progress Energy)
Duke Energy Renewables
Duke Energy Retail
Duke Energy International
Duke Energy Sustainable Solutions
Duke Energy One

History
The company began in 1900 as the Catawba Power Company when Walker Gill Wylie and his brother financed the building of a hydroelectric power station at India Hook Shoals along the Catawba River near India Hook, South Carolina  When he needed additional funding to further his ambitious plan for construction of a series of hydroelectric power plants, Wylie convinced James B  Duke and his partner James Blaney to invest in the Southern Power Company, founded in 1905 
In 1917 James Blaney was the founder of the Wateree Power Company that was formed as a holding company for several utilities that had been founded and/or owned by Duke, and Blaney his associates, and in 1924 the name was changed to Duke Power  In 1927, most of the subsidiary companies, including Southern Power Company, Catawba Power Company, Great Falls Power Company, and Western Carolina Power Company were merged into Duke Power, although Southern Public Utilities, 100% owned by Duke Power, maintained a legally separate existence for the retail marketing of Duke-generated power to residential and commercial customers  Southern Public Utilities also operated transit systems, which Duke eventually converted from streetcars to buses 
In 1988, Nantahala Power & Light Co , which served southwestern North Carolina, was purchased by Duke and is now operated under the Duke Power Nantahala Area brand  In 1990, Duke sold its remaining transit operations  Duke Power merged with PanEnergy, a natural gas company, in 1997 to form Duke Energy  The Duke Power name continued as the electric utility business of Duke Energy until the Cinergy merger 

With the purchase of Cinergy Corporation announced in 2005 and completed on April 3, 2006, Duke Energy Corporation's customer base grew to include the Midwestern United States as well  The company operates nuclear power plants, coal-fired plants, conventional hydroelectric plants, natural-gas turbines to handle peak demand, and pumped hydro storage  During 2006, Duke Energy also acquired Chatham, Ontario-based Union Gas, which is regulated under the Ontario Energy Board Act (1998) 
On January 3, 2007, Duke Energy spun off its gas business to form Spectra Energy  Duke Energy shareholders received 1 share of Spectra Energy for each 2 shares of Duke Energy  After the spin-off, Duke Energy now receives the majority of its revenue from its electric operations in portions of North Carolina, South Carolina, Kentucky, Ohio, and Indiana  The spinoff to Spectra also included Union Gas, which Duke Energy acquired the previous year In 2011, Duke Energy worked with Charlotte's business leader community to help build Charlotte into a smart city  The group called the initiative "Envision Charlotte"  At the time, the group decided on a goal to reduce energy use in the "urban core of the city by 20 percent"  To do so, the group focused on making energy consumption changes to commercial buildings larger than 10,000 square feet On July 3, 2012, Duke Energy merged with Progress Energy Inc with the Duke Energy name being retained along with the Charlotte, North Carolina, headquarters Duke announced on June 18, 2013, that CEO Jim Rogers was retiring and Lynn Good would become the new CEO  Rogers has been CEO and Chairman since 2006, while Good was Chief Financial Officer of Duke since 2009, having joined Duke in the 2006 Cinergy merger  Rogers' retirement was part of an agreement to end an investigation into Duke's Progress Energy acquisition in 2012 In 2016, Duke Energy purchased Piedmont Natural Gas for $4 9 billion to become its wholly owned subsidiary   Duke Energy completed selling its remaining power operations in Central and South America for $1 2 billion months afterwards   At one point Duke Energy had more than 4,300 megawatts of electric generation in Latin America  It operated eight hydroelectric power plants in Brazil with an installed capacity of 2,307 megawatts The company expects to spend $13 billion upgrading the North Carolina grid from 2017 On December 3, 2022, an attack was carried out on two Duke Energy substations located in Moore County, North Carolina  Damage from the attack left up to 40,000 residents without electrical power for several days, with officials closing schools and declaring a state of emergency  The Federal Bureau of Investigation supported local investigators in case the incident met the definition of domestic terrorism under the Patriot Act 

New nuclear power plant
On March 16, 2006, Duke Power announced that a Cherokee County, South Carolina site had been selected for a potential new nuclear power plant  The site is jointly owned by Duke Power and Southern Company  Duke plans to develop the site for two Westinghouse Electric Company AP1000 (advanced passive) pressurized water reactors  Each reactor is capable of producing approximately 1,117 megawatts  (See Nuclear Power 2010 Program )
On December 14, 2007, Duke Power submitted a Combined Construction and Operating License to the Nuclear Regulatory Commission, with an announcement that it will spend $160 million in 2008 on the plant with a total cost of $5 billion to $6 billion  The plant was approved in 2016 In August 2017, Duke decided to seek permission from the North Carolina Utility Commission to cancel the project due to the bankruptcy of Westinghouse and "other market activity", although they will retain the option of restarting the project at some point in the future if circumstances change This site would have been adjacent to the old site, which was never completed and abandoned in the early 1980s, and used by James Cameron as a film set for the 1989 movie The Abyss 
In 2018, Duke Energy decided not to include new nuclear power in its long-range plans 

Headquarters buildings
J A  Jones designed the first headquarters building, known as the Power Building, which was completed in 1927 at 440 South Church  It was five stories and 503,000 square feet (46,700 m2)  The Electric Center at 526 South Church Street opened in 1975 with an addition in 1988  State Farm Insurance sold the Power Building in 2004 for $8 million to The Dilweg Cos , who anticipated significant development  Novare Group bought 5 13 acres (20,800 m2) at 408 South Church Street for $17 million from The Dilweg Cos  in a deal announced March 27, 2006   The Power Building was demolished February 24, 2007 Duke Energy Center at 550 South Tryon Street was announced as the company's headquarters in 2009  The company announced May 17, 2021 that the headquarters will move in 2023 to Duke Energy Plaza, across the street from the current headquarters  Childress Klein is developing the new building, which will allow Duke to sell its Church Street and College Street buildings, and end its lease at 400 South Tryon  Previously named Charlotte Metro Tower, the 40-story building will be purchased when completed for up to $675 million by Childress Klein and CGA Capital, in the largest real estate deal in the city's history, announced in December 2019 

Finances
For the fiscal year 2017, Duke Energy reported earnings of US$3 059 billion, with an annual revenue of US$23 565 billion, an increase of 3 6% over the previous fiscal cycle  Duke Energy's shares traded at over $79 per share, and its market capitalization was valued at over US$58 8 billion in November 2018 

Environmental record
In 1999, the United States Environmental Protection Agency commenced an enforcement action against Duke Energy for making modifications to very old and deteriorating coal-burning power plants without getting permits under the Clean Air Act  Duke asserted that a "modification" under the Clean Air Act did not require a permit  Environmental groups asserted that Duke was using loopholes in the law to increase emissions  Initially, Duke prevailed at the trial court level, but in 2006 the case was argued before the Supreme Court (Environmental Defense v  Duke Energy Corp  (05-848))  The Court unanimously ruled on April 2, 2007 that the modifications allowed the power plants to operate for more hours, increasing emissions, so Clean Air Act permits were needed In 2002, researchers at the University of Massachusetts Amherst identified Duke Energy as the 46th-largest corporate producer of air pollution in the United States, with roughly 36 million
pounds of toxic chemicals released annually into the air  Major pollutants included sulfuric and hydrochloric acid, chromium compounds, and hydrogen fluoride  The Political Economy Research Institute ranks Duke Energy 13th among corporations emitting airborne pollutants in the United States  The ranking is based on the quantity (80 million pounds in 2005) and toxicity of the emissions  This change reflects the purchase of fossil fuel-heavy Cinergy, which occurred in 2005 

In early 2008, Duke Energy announced a plan to build the new, 800-megawatt Cliffside Unit 6 coal plant 55 miles (89 km) west of Charlotte, North Carolina  The plan has been strongly opposed by environmental groups such as Rising Tide North America, Rainforest Action Network, the community-based Canary Coalition as well as the Southern Environmental Law Center, which has threatened to sue Duke if it does not halt construction plans  On April 1, activists locked themselves to machinery at the Cliffside construction area as part of Fossil Fools Day 
Duke Energy has been "one of the most vocal advocates" for a "cap-and-trade" system to combat global CO2 emissions, "and the company's CEO, Jim Rogers, thinks the company will profit from cap-and-trade"  The company left the National Association of Manufacturers in part over differences on climate policy In a joint venture with the French-based global energy firm AREVA, under the nominal name of ADAGE, Duke Energy has planned a "Green" biomass burning facility in Mason County, Washington and is negotiating with forestland owners to secure the 600,000 tons of wood debris it needs yearly to fuel its $250 million biomass plant 
The joint venture between electric power company Duke Energy and global nuclear services giant AREVA was created to build wood waste-to-energy power plants around the country 
ADAGE president Reed Wills announced the first Northwest outpost will be in the struggling timber town of Shelton, Washington 
The following pollutants are provided by DUKE-AREVA-ADAGE in their application for permit to the Department of Environmental Protection for a similar type of plant in Florida 

248 tons per year – particulate matter
288 tons per year – particulate matter 10
233 tons per year – particulate matter 2 5
249 tons per year – NOx (nitrogen oxides)
246 tons per year – SO2 (sulfur dioxide)
248 tons per year – CO (carbon monoxide)
40 tons per year – H2SO4 – (sulfuric acid mist)
63 tons per year – VOC (volatile organic compounds)
29 tons per year – F (fluorides)

Generating facilities
This list is partially complete due to the July 3, 2012, merger with Progress Energy 

Biomass fired
Shelton Biomass Facility (proposed)

Nuclear
Catawba Nuclear Station
McGuire Nuclear Station
Oconee Nuclear Station
Shearon Harris Nuclear Power Plant
H  B  Robinson Nuclear Generating Station
Brunswick Nuclear Generating Station
Crystal River Nuclear Power Plant (retired February 2013)
William States Lee III Nuclear Generating Station - Future

Coal-fired
Allen Steam Station
Belews Creek Steam Station
Beckjord Power Station
Cayuga Generating Station
Crystal River Energy Complex
East Bend Station
Edwardsport Station
Gallagher Station
Gibson Station
Marshall Steam Station
Mayo Plant
Miami Fort Power Station (purchased by Dynegy, 2014)
Riverbend Steam Station (retired)
Roxboro Steam Plant
Wabash River Station
William H  Zimmer Power Station (purchased by Dynegy, 2014)

Hydroelectric
Conventional hydro
Following is a list of Duke Energy's thirty conventional hydroelectric facilities, in order of average electric production   All properties are 100% owned by Duke, and all but Markland are located in North Carolina and South Carolina (Markland is located in southern Indiana) 
Blewett Falls Hydroelectric Plant
Cowans Ford Hydro Station, 350 MW average capacity
Keowee Hydro Station, 158 MW
Walters Hydroelectric Plant, 112 MW
Tillery Hydroelectric Plant, 87 MW
Rocky Creek & Cedar Creek Hydro Stations, combined 73 MW
Great Falls & Dearborn Hydro Stations, combined 70 MW
Markland Hydro Station, 65 MW
Mountain Island Hydro Station, 60 MW
Lake Wylie Hydro Station, 60 MW
Wateree Hydro Station, 56 MW
Fishing Creek Hydro Station, 37 MW
Oxford Hydro Station, 36 MW
Bridgewater Hydro Station at Lake James, 31 5 MW
Rhodhiss Hydro Station, 26 MW
Lookout Shoals Hydro Station, 26 MW
Blewett Hydroelectric Plant, 22 MW
Ninety-Nine Islands Plant, 18 MW
Gaston Shoals Plant, 9 MW
Tuxedo Plant, 5 MW
Marshall Plant, 4 MW
and ten clustered locations at Nantahala, in mountainous southwestern North Carolina, producing a cumulative 99 MW

Pumped-storage hydro
Bad Creek Hydroelectric Station
Jocassee Pumped-Storage Generating Station

Oil and gas-fired
Anclote Station
Asheville Combustion Turbines
Bartow Combined Cycle Station
Buck Steam Station
Buzzard Roost Station
Cayuga Combustion Turbine Station
Cliffside Steam Station
Connersville Peaking Station
Dan River Steam Station
Darlington County Electric Plant
Henry County Peaking Station
Hines Energy Complex
H F  Lee Energy Complex
Lee Steam Station
W S  Lee Steam Station
Lincoln Combustion Turbine Station
Madison Peaking Station
Miami-Wabash Peaking Station
Mill Creek Combustion Turbine Station
Noblesville Station
Rockingham Station
Smith Energy Complex
Sutton Combined Cycle Plant
Wabash River Repowering Station
Wheatland Peaking Station
Woodsdale Station

Solar farms
Citing the falling cost of building solar farms, Duke Energy announced plans in 2017 to launch three new such projects in Kentucky  Two will be in Kenton County and one will be in Grant County  Together the three plants will create more than 6 7 MW of power  These join several other solar farms including:

Davidson County Solar Farm
Martins Creek Solar Farm 1 MW (Murphy, NC)
Culberson Solar Farm 1 MW (Murphy, NC)
Osceola Solar Facility 4 MW (St Petersburg, Fla)Additionally, Duke Energy added 451 MW of solar capacity to North Carolina’s grid in 2017 
Hamilton Solar Power Plant 74 9 MW (Jasper, FL)
Columbia Solar Power Plant 74 9 MW (Fort White, FL) (opening in 2020)
Live Oak Solar Power Plant ? MW (Live Oak, FL)In 2020 Duke Energy began commercial operations of several farms in Texas, operating alongside its Farm from 2010 
Blue Wing Solar Project (San Antonio, TX)
Lapetus Solar Project 100 MW (Andrews County, TX)
Holstein Solar Project 200 MW (Nolan County, TX)
Rambler Solar Project 200 MW (Tom Green County, TX)

Wind farms
Los Vientos Wind Farm
Shirley Wind

Electric vehicles
Duke Energy announced in October 2018 that it would install 530 electric car charging stations around Florida  Ten percent of the stations will go into low income communities 

Awards
Duke Energy has been chosen as one of The 50 Best Employers In America by Business InsiderIn 2002, Duke Energy was awarded the Ig Nobel Prize in Economics for "adapting the mathematical concept of imaginary numbers for use in the business world" 

Criticism
In December 2000, Cinergy Corp agreed to pay $1 4B to settle allegations that its coal plants illegally polluted the air  Duke Energy completed its acquisition of Cinergy Corp in 2006 In July 2004, Duke Energy agreed to pay $208M to settle allegations that it had engaged in price gouging in California during the energy crisis of 2000 and 2001 In December 2009, Duke Energy agreed to spend approximately $93M to resolve violations of the Clean Air Act  Duke became obligated to make investments that were expected to reduce sulfur dioxide emissions by 86% On February 14, 2011, Greenpeace launched a campaign in which Phil Radford called on Duke Energy to abandon mountaintop removal coal, produce a third of its energy from renewable sources by 2020, and abandon coal altogether by 2030 "In May 2011, Duke agreed to pay $30M to resolve allegations that changes made to the company pension plan disproportionately harmed employees over 40, costing many of them up to half of their accrued benefits In December 2011, the non-partisan organization Public Campaign criticized Duke Energy for spending $17 47 million on lobbying  It also criticized Duke for not paying any taxes from 2008 to 2010 and receiving $216 million in tax rebates, in spite of turning a $5 4 billion profit and extensively raising executive compensations In 2012, Greenpeace protested Duke's lobbying of the Democratic Party, including its funding of the 2012 Democratic National Convention In July 2012, Duke Energy was criticized for paying former Progress Energy CEO Bill Johnson $44 7 million in compensation, including a $10 million severance, for something close to 20 minutes on the job as Duke's CEO In 2012, Duke Energy sued Citrus County, Florida claiming its tax bill was too high  The county hired an outside appraiser who found that there were a lot of unreported and underreported items and the tax claim was actually too low In May 2013, university students launched a campaign for Brown University to divest fossil fuels, specifically referring to Duke Energy and other coal plant operators On February 2 2014, the massive Dan River coal-ash spill led to a grand jury investigation into Duke Energy  The initial investigation was overseen by Governor Pat McCrory, who was accused of intervening on Duke's behalf as he had been a Duke Energy employee for 28 years  Prosecutors went looking for any cash or items of value that might have been given to Governor McCrory and members of his administration in exchange for cheap settlements  Duke Energy was prosecuted, pled guilty to nine charges of criminal negligence, and agreed to pay $102 million in fines and restitutions  Duke Energy was also ordered to close all of its 32 ash ponds in the state of North Carolina by 2029 In September 2016, the Government Pension Fund of Norway, then worth $900 billion, excluded Duke Energy and its subsidiaries from the fund, citing "risk of severe environmental damage" In August 2020, environmental watchdog EWG released a report accusing Duke Energy of charging Indiana ratepayers for $12 billion worth of failed projects  This was the direct consequence of a controversial bill passed in Indiana earlier that year  Projects included two natural gas pipelines and two retired nuclear power plants 
In 2021, investigative reporting by the Orlando Sun Sentinel revealed that Duke Energy, FPL (Nextera Energy), and TECO Energy put forth more than $3 million to promote "ghost" spoiler candidates in key Florida legislature races  The scheme involved former senator Frank Artiles and was effective in costing the Democrats at least one election In January 2021, Duke Energy agreed to a settlement, which the company proposed, to absorb $1 1 billion worth of coal-ash pond closure and cleanup costs, in North Carolina, between 2015 and 2030  The parties involved also waived all rights to challenge the “reasonableness and prudence” of Duke Energy’s coal ash management practices and costs before March 2020  Duke estimates the costs to be between $8 and $9 billion, the settlement reduces the cost on the ratepayer by 60% In August 2021, Indiana city officials from Bloomington, Carmel, and West Lafayette, and other lawmakers sent a letter to Duke Energy deploring its progress towards renewables and asking it to stop overcharging low-income homes for electricity 

December 2022 rolling blackouts
In December 2022, a major winter storm impacted much of the United States  On December 24, 2022, Christmas Eve, Duke Energy implemented rolling blackouts for the first time in their history, due to unprecedented energy demand  The rolling blackouts came without warning and lasted hours  In addition to facility failures, Duke reported failures related to the software that regulated the controlled blackouts  The Federal Energy Regulatory Commission initiated an investigation in response to the blackouts 

See also
2005 Atlantic Power Outage
Harlan County USA—1976 Academy Award-winning documentary film covering the efforts of 180 coal miners on strike against the Duke Power Company in Harlan County, Kentucky, in 1973 
Fixed bill
Holiday Junction
Passage 3:
Duke Energy Florida
Duke Energy Florida, formerly Florida Power, was the generation, transmission, and distribution sector of Florida Progress Corporation   The company distributed power over much of central and north Florida  Their service area covers approximately 13,000 square miles  Along with that, the company supplies electric service to approximately 1 8 million residential, commercial and industrial customers in the state  Florida Progress merged with Carolina Power & Light in 2000 to form Progress Energy  Progress Energy merged with Duke Energy in 2012  Today the Florida operations operate as Duke Energy Florida 

History
In 1899, Frank A  Davis founded the St  Petersburg Electric Light and Power Company in the newly founded town of St  Petersburg, Florida 
In 1911 it started offering 24 hour service to their customers 
After a series of expansions, in 1927 St  Petersburg Electric Light and Power Company became Florida Power Corporation 
Reddy Kilowatt became the company's mascot in In 1939 
The Honner family received free television from Florida Power Corporation in 1952 in celebration of the company installing its 200,000th meter 
In 1963, the company installed a specially designed underwater cable in the Gulf of Mexico  It was believed to be the longest one-piece installation in Florida back then  Land was also purchased to build their first nuclear power plant in Citrus County 
Andrew H  Hines became the company's president in 1972 
In 1977, the nuclear power plant was finally built in Citrus County 
In 1982, in hopes of diversifying beyond utility operations, Florida Power reorganized as a holding company, Florida Progress Corporation 
Louie the Lighting Bug became the mascot for their television ads in 1983
Context 3: Passage 1:
Rasmus Rasmussen (actor)
Rasmus Rasmussen (4 November 1862 – 17 July 1932) was a Norwegian actor, folk singer and theatre director 
He was born in Molde, a son of captain Chrispinus Martinus Rasmussen and Anna Helene Carlsen  He emigrated to the United States around 1880, where he earned his living as a logger, but returned to Norway some years later  He performed at Den Nationale Scene in Bergen from 1887 to 1910  The next two years he toured Norway as a singer  He was the first theatre director of Det Norske Teatret, from 1912 to 1914, and during this period he also contributed as actor in several plays  He served as theatre director at Trondhjems nationale Scene from 1916 to 1924 He appeared in the several silent movies, including Bride of Glomdal and Brudeferden i Hardanger, both from 1926 and his only sound film, Kristine Valdresdatter in 1930 

Selected filmography
Dolken (1915)
The Sea Vultures (1916)
Passage 2:
Morten Borgersen
Morten Borgersen (born 12 October 1950) is a Norwegian actor, theatre director, artistic director and writer  
He has worked for various theatres, including Trøndelag Teater, Rogaland Teater, Riksteatret, Teatret Vårt, Teater Ibsen, Oslo Nye Teater, Det Norske Teatret, Nationaltheatret, Fjernsynsteatret, Den Nationale Scene, Haugesund teater,  Nordland Teater,  Kilden teater og Konserthus, Opera Bergen og Maksim Gorkij teater, Vladivostok, Russland( Anna Karenina og Et dukkehjem) ]  In 1991 he was appointed as the first theatre director of Teatret Vårt in Molde, after nineteen years of collective management, and had this position until 1997  From 1998 to 2001 he was artistic director of Teater Ibsen   He was artistic director of Den Nationale Scene in Bergen from 2001 to 2007 He published his first novel in 2012: Jeg har arvet en mørk skog  His second novel 2014: Forestillinger  Non-fiction 2015: Våre stemmer 
Passage 3:
Bjarte Hjelmeland
Bjarte Hjelmeland (born 24 February 1970) is a Norwegian actor and theatre director  He was born in Bergen  He made his stage debut in 1991 at Oslo Nye Teater, and also had notable roles at the National Theatre, Rogaland Teater, Torshovteatret, Den Nationale Scene and Chateau Neuf  In 2008 he was hired as director of Den Nationale Scene Films include his screen debut Byttinger (1991), Livredd (1997) and Desperate bekjennelser (1998)  Television series include Vestavind (1994–1995), the talk show Mandagsklubben (1996–1997) and Hvaler  He was a judge on Series 6 of Norske_Talenter  He has also released music albums Hjelmeland is openly gay 
Passage 4:
Karl Bergmann
Karl Bergmann (15 November 1882 – 16 June 1964) was a Norwegian actor and theatre director  He made his stage debut in 1901 at Den Nationale Scene in Bergen  He served as theatre director of Den Nationale Scene from 1931 to 1934 

Personal life
Bergmann was born in Bergen on 15 November 1882, a son of hairdresser Carl Pedersen and Alida Bergmann  In 1906 he married actress Lilly Catharina Thomsen 
Passage 5:
Den Nationale Scene
Den Nationale Scene (English: National Theater) is the largest theatre in Bergen, Norway  Den Nationale Scene is also one of the oldest permanent theatres in Norway 

History
Opened under the name Det Norske Theater in 1850,  the theatre has roots dating back to its founding on the initiative of the Norwegian violinist Ole Bull  The theatre was created to develop Norwegian playwrights  Henrik Ibsen was one of the first writers-in-residences and art-directors of the theatre and it saw the première in Norway of his first contemporary realist drama The Pillars of Society (Samfundets støtter) on 30 November 1877 The theatre was initially housed in the Komediehuset på Engen  In 1909, The National Theatre moved into the new theatre building at Engen  The current theatre building was designed by Einar Oscar Schou, and opened 19 February 1909 with a production of Erasmus Montanus by Ludvig Holberg



ground_truth: Sun

prompt_front: Answer the question based on the given passages. Only give me the answer and do not output any other words.

Question: Are both Duke Energy and Affiliated Managers Group based in Massachusetts?

The following are given passages.
Context 2: 
The company reached 1 million customers in 1986 
In 2000, Florida Progress merged with Raleigh, North Carolina-based Carolina Power & Light to form Progress Energy Inc 
Progress Energy merged with Duke Energy in 2012 

Future Projects
On March 25, 2019, Duke Energy Florida announced the new locations of where they will be putting their newest universal solar power plants  The three locations are Lake Placid in Highlands County, Trenton in Gilchrist County, and DeBary in Volusia County   Duke Energy Florida is predicting that these three solar plants will eliminate nearly 800 million pounds of carbon dioxide emissions in Florida each year upon commercial operation 

External links
https://www duke-energy com/our-company/about-us/our-history


== Regerences ==
Passage 4:
Sean Healey
Sean Michael Healey (1961 – May 26, 2020) was an American businessman who was chairman and chief executive officer of Affiliated Managers Group, Inc  (NYSE: AMG), a global asset management firm whose affiliates in aggregate managed approximately $736 billion as of December 31, 2018 

Early life and education
Healey was born in San Rafael, California   Healey attended high school in Oceanside, California, followed by Harvard College, where he was a member of the varsity wrestling squad  In 1983, he received an A B  in history and literature, magna cum laude, and was elected to Phi Beta Kappa 
After graduating from Harvard, Healey was awarded a Rotary Scholarship to study philosophy at University College in Dublin, Ireland, and was awarded a master's degree in philosophy with first-class honors in 1984   In 1987, he earned a J D  from Harvard Law School, and he was an editor of the Harvard Law Review 

Early career
Upon graduation from law school, Healey joined Goldman Sachs as an associate in the Mergers and Acquisitions Department, then transferred to a group that provided investment-banking services to financial institutions, where he worked under J  Christopher Flowers 

Affiliated Managers Group
In April 1995, Healey was recruited to join Affiliated Managers Group (AMG), then a three-person start-up firm seeking to invest in boutique money managers  AMG was founded in 1993 with private equity backing from TA Associates and made its first investment in 1994  When Healey joined AMG as Executive Vice President, the firm had a single investment in a manager with under $1 billion of assets under management With Healey on board, AMG received its second round of capital and subsequently invested in several U S -based investment firms  By October 1996, AMG had approximately $18 billion under management  In October 1997, AMG closed its investment for a 70% stake in Tweedy, Browne Company LLC, a well-known value-oriented investment management firm In November 1997, Healey led AMG’s initial public offering in which the company raised $176 million, priced at $23 50 per share  With proceeds from the offering, AMG continued to expand, and named Healey president and chief operating officer in October 1999  In 2001, AMG was named in Fortune magazine’s list of 100 Fastest-Growing Companies and had approximately $81 billion in assets under management  Healey became president and chief executive officer in 2005, and chairman and chief executive officer in 2011 AMG’s business model of leaving a portion of equity with each firm’s management as motivation for continuing to produce good performance and growth has been highly successful under Healey's leadership   AMG also uses employment contracts to ensure that asset management firms retain talented managers, and establishes long-term succession plans with managers   Healey has also been noted for being extraordinarily selective of his affiliate partners, stating in a recent interview that the company ultimately backs away from many more potential investments than it pursues Healey also helped AMG to expand globally   AMG opened the firm’s first distribution office in Australia in 2007, and thereafter expanded into Europe, Asia and the Middle East, to help its affiliates develop relationships in overseas markets  AMG furthered its expansion with the formation of AMG Wealth Partners in 2011 After AMG posted three-year average earnings growth of 40%, Fortune magazine again named AMG to its list of 100 Fastest-Growing Companies in 2012 In May 2018, Healey was diagnosed with amyotrophic lateral sclerosis (a motor neuron disease otherwise known as ALS, or Lou Gehrig's disease) and AMG announced that Healey was stepping back to become Executive Chairman while Nate Dalton, AMG's long-time President and Chief Operating Officer, was named CEO 

The Healey Center for ALS
In November 2018, Healey, with support from AMG and a group of friends and colleagues, established the Sean M  Healey and AMG Center for ALS at Massachusetts General Hospital with an initial donation of $40 million  The Healey Center is led by Dr  Merit Cudkowicz, a world-renowned ALS researcher and Chair of the Neurology Department at MGH  The Healey Center is the largest hospital-based ALS research program in the world and supports a broad range of early stage trials of promising ALS treatments 

Personal life
Healey held a number of nonprofit board positions, including serving as co-chairman of the board of trustees of the Peabody Essex Museum; as a member of the Council on Foreign Relations; the Visiting Committee of the Harvard Law School; and the board of trustees of the International Game Fish Association In 2006, Healey was appointed by President George W  Bush to serve on the President’s Export Council, the U S ’s principal advisory committee on international trade Healey was an avid big-game hunter and sport fisherman, having boated a 93 5 pound white marlin, which was the winning fish in the 2010 White Marlin Open, the world’s largest billfish tournament He was previously married to Kerry M  Healey, the former lieutenant governor of Massachusetts  They had two children  Healey remarried in 2018 to Amy Broch  The couple had one daughter  
Healey died from amytrophic lateral sclerosis on May 26, 2020, at the age of 59 
Passage 5:
Darrell Crate
Darrell W  Crate (born 1967) is an American investor, private equity manager, and philanthropist  He is currently the managing principal of Easterly, a private investment firm he founded in 2009 in Beverly, Massachusetts A native of New York City, Crate attended Bates College in Lewiston, Maine before attending Columbia Business School in New York City  He began his career with Chase Manhattan Bank and Chase Manhattan Securities  His last assignment as the managing director of Financial Institutions Group based in London  Soon after he was asked to join Affiliated Managers Group where he helped to scale the business from 1998 to 2011, as Chief Financial Officer 
After departing AMG, Crate founded Easterly, where he has focused on a number of ventures, including founding a publicly-traded REIT, sponsoring a SPAC and building an asset management platform which owns stakes in third-party investment management businesses and assists them with their strategic growth 

Early life and education
Crate was born in New York City in 1967  Crate received his Bachelor of Arts in economics from Bates College in 1989 and his M B A  from Columbia Business School in 1995 

Investment career
Chase bank
Crate began his career with Chase Manhattan and Chase Manhattan Securities in New York  His last assignment as the managing director of the Financial Institutions Group based in London, focusing exclusively on investment management firms in England, Spain, France, Italy, Germany and the Benelux region 

Affiliated Managers Group
As chief financial officer
From 1998 to 2011, he served as the chief financial officer of Affiliated Managers Group a publicly traded asset management holding company  During his tenure at AMG, assets under management grew from $50 billion to over $340 billion through mutual fund, pension, and high-net-worth accounts globally, with over half of its clients domiciled outside the United States  During his tenure as CFO, the firm acquired interests in over 30 firms including Third Avenue Management, ValueAct Capital, AQR Capital Management, BlueMountain Capital Management and Tweedy, Browne Company  Over this same period, the company’s valuation increased materially, from $450 million to $6 billion

Easterly
As founder
In 2009, Crate founded Easterly Capital, LLC, a firm based in Beverly, Massachusetts, that builds operating businesses to gain exposure to the growth in both asset management and non-bank finance sectors   He joined the firm full-time in 2011 

As chairman
In February 2015, Crate became the chairman of Easterly Government Properties, Inc , a publicly traded REIT on the New York Stock Exchange that is focused primarily on the acquisition, development and management of Class A commercial properties that are leased to U S  Government agencies that serve essential functions  According to Business Wire, Crate became the chairman of Easterly Acquisition Corp , a publicly traded blank check company in July 2015 In March 2019, Easterly purchased the institutional investment business of Levin Capital Strategies, establishing Levin Easterly Partners, a long-only asset manager  Levin Easterly had approximately $6 1 billion in assets under management upon closure of the transaction   Levin Easterly is a fundamental, contrarian value investment management firm focusing on US Large and All Cap Value strategies based in New York and New Canaan, CT  One area of focus for the firm has been special purpose acquisition companies (SPACs)  They are one of the most experienced investors in these vehicles, with a track record of investing in SPACs that spans over a decade In May 2020, Easterly acquired an equity interest in James Alpha Advisors, LLC, a boutique asset management firm specializing in Global REITs, Structured Credit and Hedged Equity  In addition, the firm provides a platform of liquid alternative portfolios for institutional and individual investors  James Alpha Advisors had over $1 1 billion in assets under management at the time of the transaction Easterly Alternatives is the alternatives-focused arm of Easterly and has raised more than $500 million in private and platform vehicles in sectors including real estate, healthcare and transportation  Easterly Alternatives recently has launched a SPAC Fund, in which it will invest in the best new-issue SPAC IPOs that come to market 

Personal life
Crate currently lives in Florida, Maine and Hamilton, Massachusetts He is involved with a number of non-profit, political, and charitable organizations  He has been a trustee of Bates College since 2003 and served on the college's advancement and investment committees  On February 8, 2016, the college announced that Crate was among seven families to donate $19 million to endow professorships and launch the college’s new digital and computational studies program  Crate also serves as a trustee of Think of Us, a not-for-profit technology platform with the ultimate goal of helping foster youth successfully transition into a prosperous adulthood 
Crate currently serves as Vice Chairman of the Aircraft Owners and Pilots Association (AOPA)  A licensed private pilot since 1993, Crate has more than 6,000 flight hours and has flown his single-engine TBM plane to all of the 48 continental states  He also serves on the advisory counsel to the National Park Foundation  He has a particular focus and interest in the National Parks located in Maine, North Carolina and Montana Crate is a member of the Advisory Council of the Robert F  Kennedy Children's Action Corps (2006), a national leader in child welfare and juvenile justice programs and services  In 2019, the RFK Children’s Action Corps honored Crate with its prestigious "Robert F  Kennedy Embracing the Legacy Award” for his work on behalf of at-risk youth  Crate also served as a Trustee of Think of Us, a not-for-profit technology platform with the ultimate goal of helping foster youth successfully transition into a prosperous adulthood Other interests include serving as a trustee of Islesboro Island Trust (2002), Adams Memorial Foundation (2011),  Ethel Walker School (2015) IRYS School of Technology and Trades (2020)and an advisor to The Trustees of Reservations (2002) 

Political involvement
According to Boston com, Crate served as treasurer and a member of the executive committee of the Romney for President campaign in 2012, a role that he also held during the 2008 cycle  From 2003 to 2007, Crate served as the chairman of the Massachusetts Republican Party, and a senior advisor to Governor Mitt Rommney 

See also
List of Bates College people
List of Columbia University people
Massachusetts Republican Party
Passage 6:
Affiliated Managers Group
Affiliated Managers Group, Inc  (NYSE: AMG) is a strategic partner to independent investment management firms globally, with equity stakes in a number of partner-owned traditional investment managers, hedge funds, and specialized private equity firms which it calls “Affiliates ” The company has principal offices in West Palm Beach, Florida; Prides Crossing, Massachusetts; Stamford, Connecticut; and London, United Kingdom  The company was founded in December 1993 by William J  Nutt in Boston, Massachusetts, as a privately owned company with initial backing from TA Associates; Its initial public offering on the New York Stock Exchange occurred in November 1997   Today, AMG’s Affiliates manage $651 billion in assets in aggregate  
AMG’s strategy is to generate value by investing in an array of independent firms and supporting their long-term growth, through an approach in which significant equity ownership is retained by the management partners of each Affiliate, and each Affiliate operates and invests autonomously from AMG and from other Affiliates   The Affiliate principals’ ‘skin in the game’ incents them to maximize long-term value creation, and their retained investment independence preserves the entrepreneurial cultures of each Affiliate firm   AMG’s approach aligns incentives between AMG shareholders, Affiliate principals, and Affiliate clients, and is unique in the investment industry   AMG also offers its Affiliates growth capital, distribution and marketing capabilities, and other strategic support, and its intention is to “magnify” its Affiliates’ growth opportunities without interfering in their operations 

History
In 1993, AMG was founded by William Nutt In 1997, AMG invested in Tweedy, Browne and completed its initial public offering, listing on the New York Stock Exchange  
In 2004, AMG established a U S  retail platform which would enable its Affiliates to manufacture, market, and distribute products to the U S  wealth marketplace   AMG also made a minority investment in AQR, a quantitative investment manager and hedge fund firm, its first investment in an alternative investment firm, and its first minority investment In 2005, Sean M  Healey was named chief executive officer In 2007, AMG opened its first non-U S  institutional distribution office in Sydney, Australia, to provide sales and marketing services to institutional clients in Australia and New Zealand   Today, AMG operates distribution capabilities serving the Asia, Australia, Europe / U K , and Middle East marketplaces In 2009, AMG announced investments in Harding Loevner and Gannett Welsh & Kotler In 2010, AMG acquired a majority stake in Pantheon Ventures   The private equity company was AMG’s largest investment to date   AMG also invested in Artemis Investment Management  In 2016, AMG made an investment in leading technology-driven liquid alternative firm Systematica Investments In 2018, after being diagnosed with ALS, Sean Healey stepped down from his position as chief executive officer  He died in May 2020   Nathaniel Dalton, previously president and chief operating officer, succeeded him In 2019, Jay Horgen succeeded Dalton as president and chief executive officer   Horgen joined AMG in 2007 and previously served as chief financial officer, as well as executive vice president, focusing on investments in new AMG Affiliates In 2021, AMG invested in four companies, including Parnassus Investments, the largest ESG-dedicated fund manager in the U S In 2022, AMG increased its investment in Systematica Investments, a quantitative and systematic investment firm Other Information
AMG is known for its research  ,, on independent firms’ advantages in consistently generating excess returns The company is also known for its commitment to corporate citizenship and community engagement   AMG was a founding donor to the Sean M  Healey and AMG Center for ALS at Massachusetts General Hospital, and continues to support the Center with fundraising and charitable events 
Passage 7:
Progress Energy Inc
Progress Energy, headquartered in Raleigh, North Carolina, is a subsidiary of Duke Energy and prior to its merger with Duke Energy was a Fortune 500 energy company with more than 21,000 megawatts of generation capacity and $9 billion in annual revenues  Progress Energy includes two major electric utilities that serve approximately 3 1 million customers in the Carolinas and Florida  As an independent company, the last chairman and CEO of Progress Energy was William D  Johnson; his predecessor was Robert McGehee, who died on October 9, 2007 at the age of 64 of a stroke while on a business trip to London 
Progress Energy is the majority owner and operator of the Brunswick, Crystal River 3, Robinson, and Shearon Harris nuclear power plants 
On October 16, 1999, third quarter earnings of Florida Progress Corp  fell 20 5 percent as damage from Hurricane Floyd On August 24, 1999, Carolina Power & Light Co  said that it would acquire Florida Progress Corp  for $5 3 billion, creating the nation's ninth-largest electric utility The company's current slogan is, "People, performance, excellence "

History
In 2000, Carolina Power & Light bought Florida Power Corporation and changed its name to Progress Energy  Progress Energy represents a family of companies, including CP&L, Florida Power, Progress Telecom, NCNG and SRS, and an important new organization, Energy Ventures  The company built a new headquarters in downtown Raleigh in 2004 On January 10, 2011, Duke Energy announced plans to take over Progress Energy in a $26 billion deal resulting in the country's largest electric utility with 7 1 million customers  Duke Energy plans to "maintain substantial operations in Raleigh " When the merger was completed on July 3, 2012, Duke Chairman James E  (Jim) Rogers became Chairman and CEO of the new combined company, while Progress CEO Bill Johnson resigned 

Environmental record
In 2008, the Corporate Responsibility Officer named Progress Energy to its list of 100 Best Corporate Citizens  Progress Energy was named to the Dow Jones Sustainability Index in 2009, 2008, 2007, 2006 and 2005 The company is investing $300,000 in a UNC Chapel Hill study to map the offshore wind power potential of North Carolina  Progress Energy launched its SunSense-branded solar incentive programs in 2009 Progress Energy has installed flue-gas desulfurization technology, or scrubbers, to remove sulfur dioxide emissions from its nine largest coal-fired power plant units Researchers at the University of Massachusetts Amherst have identified Progress Energy as the 29th-largest corporate producer of Air pollution in the United States in 2002, when it released roughly 39 million pounds of toxic chemicals into the air  Major pollutants included nickel compounds, chromium compounds, sulfuric acid, and hydrochloric acid  Progress has also been named a potentially responsible party at the Carolina Transformer Co  Superfund toxic waste site, according to the Center for Public Integrity 

Naming rights
Progress Energy owns the naming rights to the University of Central Florida's Progress Energy Welcome Center, St  Petersburg's Progress Energy Park, home of Al Lang Field, Progress Energy Center for the Arts-Mahaffey Theater, and the "Progress Energy Center for the Performing Arts" in downtown Raleigh, NC 

See also
List of power stations in Florida
Passage 8:
Gulfstream Natural Gas Pipeline
Gulfstream Natural Gas Pipeline is a natural gas pipeline that brings gas from Mississippi and Alabama, underwater across the Gulf of Mexico, to Florida   It was owned by Duke Energy, but is now owned by Enbridge   Its FERC code is 183 

See also
Florida Gas Transmission Pipeline
Passage 9:
Crystal River Energy Complex
The Crystal River Energy Complex consists of seven power-generating plants on a 4,700-acre (1,900 ha) site near the mouth of the Crystal River in Citrus County, Florida   Crystal River 1, 2, 4, and 5 are fossil fuel power plants  Crystal River 3 was previously the sole nuclear power plant on the site (1977-2013)  The Crystal River Combined Cycle site consists of two Mitsubishi gas turbines, which came on-line in 2018   The complex was developed in the early 1960s by the Florida Power Corporation and sold to Progress Energy Inc in 2000  Following Progress Energy's merger with Duke Energy in 2012, the facility is owned and operated by Duke Energy In February 2013, Duke Energy announced that Crystal River 3 would be permanently shut down 

Power plants
See also
Levy County Nuclear Power Plant
Progress Energy Inc
List of power stations in Florida
Passage 10:
Crescent Communities
Crescent Communities is a real estate investor, developer, and operator of mixed-use communities with headquarters in Charlotte, North Carolina  It has approximately 115 employees  The company has offices in Charlotte, Washington, D C , Atlanta, Orlando, Nashville, Dallas, Denver, Phoenix, and Salt Lake City 

History
In 1939, Duke Power (now Duke Energy) established a forestry department to manage company land not used for power generation  In 1963, this department became the company South Carolina Land and Timber  As the holdings expanded to include land in North Carolina, the organization was renamed Crescent Land and Timber in 1969  Some of the original land was sold to Crescent Land and Timber by the Singer Corporation In the mid-1980s, the company was renamed Crescent Resources as it began to actively develop residential communities  Crescent Resources began work on its first commercial development, Coliseum Centre, in 1990  As of 1991, Crescent Resources managed 270,000 acres of land  Holdings included part of what became Lake James State Park, which it later sold to the state of North Carolina  Crescent Resources became a separate entity from Duke Energy in 2006,  with Duke Energy selling its 49% stake to Morgan Stanley Crescent Resources filed for bankruptcy in 2009, and has emerged from it separated from the utility company  The company aimed to rebrand itself, renaming itself "Crescent Communities" in 2013 

External links
Crescent Communities
Context 3:  King Haakon VII of Norway and Queen Maud were in attendance  It soon became apparent that the building was too small  In 1913 the company bought Ekserserhuset Jonsvoll to use as a warehouse  In 1920, an extension was built to the northwest  Over the years the building has undergone major changes, extensions, renovation, restoration and stage technical modernisation  The foyer and the hall were destroyed during the Second World War, and only temporarily restored The theatre experienced a pre-war high point during the period 1934-39 under the leadership Hans Jacob Nilsen  Especially noteworthy was the 1935 premiere of the play Vår ære og vår makt ("Our Honor and our Power") by Nordahl Grieg 
In 2001 the building was restored almost to its original shape  Today the theatre houses three stages/venues and presents approximately 20 productions each year, both international and national classics, musicals and contemporary drama, as well as children's theatre   Since 1993, the theatre has been state property 

Directors of the Theatre
1876–1879 Nils Wichstrøm
1879–1880 Johan Bøgh
1880–1881 John Grieg
1881–1884 Johan Bøgh
1884–1888 Gunnar Heiberg
1888–1889 Henrik Jæger
1889–1890 Otto Valseth
1890–1895 Johan Irgens-Hansen
1895–1898 Olaf Hansson
1899–1900 Hans Aanrud
1900–1905 Gustav Thomassen
1905–1907 Anton Heiberg
1908–1909 Olaf Mørch Hansson
1910–1924 Ludvig Bergh
1924–1925 Christian Sandal
1925–1931 Thomas Thomassen
1931–1934 Karl Bergmann
1934–1939 Hans Jacob Nilsen
1939–1946 Egil Hjorth-Jenssen
1946–1948 Stein Bugge
1948–1952 Georg Løkkeberg
1952–1961 Per Schwab
1961–1963 Bjarne Andersen
1963–1967 Gisle Straume
1967–1976 Knut Thomassen
1976–1982 Sven Henning
1982–1986 Kjetil Bang-Hansen
1986–1996 Tom Remlov
1996–1997 Ketil Egge
1997 Aksel-Otto Bull
1998 Lars Arrhed
1998–2001 Bentein Baardson
2001–2007 Morten Borgersen
2008–2012 Bjarte Hjelmeland
2012– Agnete Haaland

See also
Thorolf Rafto Memorial Prize
Passage 6:
Rønnaug Alten
Rønnaug Alten (9 February 1910 – 20 January 2001) was a Norwegian actress and stage instructor 

Biography
She was born in Tromsø, Norway  Her parents were Emil Bredenbech Melle (1878–1950) and Ragna Aass (1880–1975)  After her parents' divorce in 1913, she was raised by her mother and her stepfather, Supreme Court Justice Edvin Alten (1876–1967)  Her half-sister Berit Alten (1915–2002) was married to literary historian Asbjørn Aarnes (1923–2013)  She grew up in Kristiania (now Oslo) and attended Frogner School graduating artium in 1928 In 1932, she married the actor Georg Løkkeberg (1909–1986)  Their marriage was dissolved in 1947  She was the mother of the film director and screenwriter Pål Løkkeberg (1934–1998) She made her stage debut at Den Nationale Scene in 1930 as "Viola" in Shakespeare's play Twelfth Night  During her career, she worked for various theatres, including Det Nye Teater (1931–38), Nationaltheatret (1935), Trøndelag Teater (1945–48), Riksteatret (1949–51), Folketeatret (1952–59), Oslo Nye Teater (1959–68) and Teatret Vårt in Molde (1972–74)  Her final performance was at the Riksteatret in 1975 Rønnaug Alten's film career began in 1936 with a role under film director Olav Dalgard  She also translated and organized a series of recordings for NRK  She served as an instructor principally for children's performances  She was a board member of the Norwegian Actors' Equity Association  
She was decorated Knight, First Class of the Order of St  Olav in 1982  Also in 1982, she shared the award for Best Actress at the 18th Guldbagge Awards with Sunniva Lindekleiv and Lise Fjeldstad for their roles in Little Ida 

External links
Rønnaug Alten at IMDb
Passage 7:
Viola (Twelfth Night)
Viola is the protagonist of the play Twelfth Night, written by William Shakespeare 

Role in the play
Viola's actions produce all of the play's momentum  She is a young woman of Messaline  In the beginning, Viola is found shipwrecked on the shores of Illyria and separated from her twin brother, not knowing whether he is alive or dead, the Sea Captain tells her that this place is ruled by the Duke Orsino, who is in love with Countess Olivia  Viola wants to serve her, but, finding this impossible, she has the Sea Captain dress her up like a eunuch, so she can serve the Duke instead 
Viola chooses the name Cesario and secures a position as a page working for the Duke  He then entrusts Cesario (Viola) to express his love for Olivia, without knowing that Viola had begun to fall in love with him  When Viola hears this she is heartbroken but listens reluctantly  Cesario continues to pass messages back and forth between the Duke and Olivia, but this eventually places her in somewhat of a quandary: she is forced by duty to do her best to plead Orsino's case to Olivia, but an internal conflict of interest arises when she falls in love with Orsino, and Olivia, believing her to be male, falls in love with her



ground_truth: no

prompt_front: Answer the question based on the given passages. Only give me the answer and do not output any other words.

Question: What is the first name of the author who wrote the play in which Rønnaug Alten made her stage debut at Den Nationale Scene in 1930 as "Viola"?

The following are given passages.
Context 3:  Upon receiving a ring from Olivia's steward, Viola contemplates the love triangle her disguise has created, admitting only time can solve it 
When Sebastian, Viola's lost twin, arrives alive and well in Illyria with a pirate named Antonio, the chaos of mistaken identity ensues because of their remarkably similar looks, only made more similar due to Viola dressing up as a male  The absurdity of the identity crisis builds until Sebastian and Viola as Cesario meet for the first time, and eventually recognise one another  Olivia and Sebastian have already been secretly married, as she mistook him for Cesario, and Sebastian, ignorant of the foregoing love triangle, was simply entranced by a beautiful woman  Ultimately then, given what he has witnessed, Orsino admits that he will no longer pursue Olivia, agreeing to love her as his sister, and decides to take Viola as his wife once she quits her disguise 
Although Viola is the play's protagonist, her true name is not spoken by any character—including herself—until the final scene of the play (Act 5, scene 1) 

Art and stage depictions
Circa 1771 Francis Wheatley used actress Elizabeth Younge as a model to paint Viola in Act III, Scene 4 after she and Sir Andrew have drawn swords (painting top-right) 

William Hamilton painted the confrontation between Olivia and Viola circa 1797: in Act V, Scene 1 Olivia believes Viola (dressed as Cesario) to be Sebastian (Viola's twin brother) who she has just married  After Viola denies any knowledge, incredulous Olivia asks the priest to confirm they were married just two hours prior Walter Howell Deverell used model Elizabeth Siddal in his 1850 painting, showing Viola as Cesario looking longingly at Duke Orsino 

In the mid-19th century Frederick Richard Pickersgill painted a few scenes, including: in Act 1, Scene 4 after the character Viola is shipwrecked, when she cross-dresses as Cesario, enters the service of Duke Orsino as his page and falls in love with him; and in Act 3, Scene 1 when Olivia declares her love for Cesario (1859 painting) 

In the 20th century German actress Lucie Höflich played Viola in Was ihr wollt (Twelfth Night in German) at the Deutsches Theater in Berlin Tallulah Bankhead played Viola in a 1937 radio broadcast of the play Eddie Redmayne made his professional stage debut as Viola for Shakespeare's Globe at the Middle Temple Hall in 2002 In 2009, Anne Hathaway played Viola in the Shakespeare in the Park production of Twelfth Night in Central Park, directed by David Sullivan 

Film representations
Twelfth Night (1910) – Directed by Eugene Mullin – Viola: Florence Turner
Twelfth Night (1937) – Director N/A – Viola: Dorothy Black
Twelfth Night (1939) – Directed by Michel Saint Denis – Viola: Peggy Ashcroft
Twelfth Night (1957) [TV] – Directed by David Greene – Viola: Rosemary Harris
Twelfth Night (1957) – Directed by Caspar Wrede – Viola: Dilys Hamlett
Twelfth Night (1969) – Directed by John Sichel – Viola: Joan Plowright
Twelfth Night (1974) – Directed by David Giles – Viola: Janet Suzman
Twelfth Night (1980) [TV] – Directed by John Gorrie – Viola: Felicity Kendal
Twelfth Night (1987) – Directed by Neil Armfield – Viola: Gillian Jones
Twelfth Night or What You Will (1988) – Directed by Kenneth Branagh of the Royal Shakespeare Company/produced for television by Thames Television – Viola: Frances Barber
Twelfth Night, or What You Will (1988)– Directed by Paul Kafno – Viola: Frances Barber
Twelfth Night (1992) – [Animated Tales] – Directed by Mariya Muat – Viola: Fiona Shaw
Twelfth Night (1996) – Directed by Trevor Nunn – Viola: Imogen Stubbs
Twelfth Night, or What You Will (1998) [TV] – Directed by Nicholas Hytner – Viola: Helen Hunt
Twelfth Night, or What You Will (2003) – Directed by Tim Supple – Viola: Parminder Nagra
She's the Man (2006) – Directed by Andy Fickman – Viola: Amanda Bynes (Inspired by Twelfth Night)
Passage 8:
Gustav Thomassen
Gustav Thomassen (16 February 1862  – 6 May 1929) was a Norwegian stage actor and theatre director 

Biography
Thomassen was born in Bergen, Norway   He was the son of Salmaker Osmund Thomassen (1816-1892) and Caroline Olava Thomine Eckhoff (1828-1871)  He made his stage debut in 1881 at Den Nationale Scene in Bergen   He worked at Den Nationale Scene until 1905, and served as theatre director from 1900 to 1905 From 1905 to 1929 he worked as an actor and instructor at Nationaltheatret in Oslo   He was noted for his title role in the four act comedy Jan Herwitz  Gamle Bergensbilleder which was written by  Hans Wiers-Jenssen in 1913  From 1916-1923, he worked as a director  His main effort at the Nationaltheater was the staging of comedies by Ludvig Holberg, especially Jeppe på bjerget (1722), Den Stundesløse (1723) Erasmus Montanus (1722)  and Barselstuen (1723) 
Passage 9:
Kolbjørn Buøen
Kolbjørn Buøen (20 January 1895 – 5 October 1975) was a Norwegian actor  He was born in Flå  He made his stage debut at Den Nationale Scene in Bergen in 1920  He played "the hangman" in the first stage adaptation of Pär Lagerkvist's Bödeln in 1934, a play that received much attention  Buøen was appointed at Den Nationale Scene from 1920 to 1938, and thereafter at Nationaltheatret from 1938 to 1965  He made his film debut in 1951, in Kranes konditori  He received the Norwegian Theatre Critics Award in 1957 

External links
Kolbjørn Buøen at IMDb
Passage 10:
Thomas Thomassen
Thomas Thomassen (19  November 1878 – 7  January 1962) was a Norwegian actor, director and theater manager 
Thomassen was born in Tønsberg, Norway  He was the son of Thomas Marthinius Thomassen (1845–1925) and Laura Christine Thoresen (1847–1931) 
He made his stage debut in 1900 at Centralteatret  He served as theatre director of Stavanger Faste Scene from 1918 to 1921, and of Den Nationale Scene in Bergen from 1925 to 1931 He chaired the Norwegian Actors' Equity Association from 1915 to 1918, and from 1924 to 1925 In 1904, he married Ingebjørg Klafstad (1878–1961)  He was the father of the actor and director Knut Thomassen (1921–2002) 



ground_truth: William