Extravehicular activity - wikipedia Extravehicular activity `` Spacewalk '' redirects here. For the Red Hat software, see Spacewalk ( software ). Cosmonaut Sergey Volkov works outside the International Space Station on August 3, 2011. Stephen Robinson riding the robotic arm during STS - 114, doing a first in - flight repair of the Space Shuttle. The landmass in the backdrop is the Bari region of Somalia. Extravehicular activity ( EVA ) is any activity done by an astronaut or cosmonaut outside a spacecraft beyond the Earth 's appreciable atmosphere. The term most commonly applies to a spacewalk made outside a craft orbiting Earth ( such as the International Space Station ), but also has applied to lunar surface exploration ( commonly known as moonwalks ) performed by six pairs of American astronauts in the Apollo program from 1969 to 1972. On each of the last three of these missions, astronauts also performed deep - space EVAs on the return to Earth, to retrieve film canisters from the outside of the spacecraft. Astronauts also used EVA in 1973 to repair launch damage to Skylab, the United States ' first space station. A `` Stand - up '' EVA ( SEVA ) is when an astronaut does not fully leave a spacecraft, but is completely reliant on the spacesuit for environmental support. Its name derives from the astronaut `` standing up '' in the open hatch, usually to record or assist a spacewalking astronaut. EVAs may be either tethered ( the astronaut is connected to the spacecraft ; oxygen and electrical power can be supplied through an umbilical cable ; no propulsion is needed to return to the spacecraft ), or untethered. Untethered spacewalks were only performed on three missions in 1984 using the Manned Maneuvering Unit ( MMU ), and on a flight test in 1994 of the Simplified Aid For EVA Rescue ( SAFER ), a safety device worn on tethered U.S. EVAs. The Soviet Union / Russia, the United States, and China have conducted EVAs. Contents 1 Development history 1.1 First spacewalk 1.2 Project Gemini 1.3 First EVA crew transfer 1.4 Apollo lunar EVA 1.5 Post-Apollo EVAs 1.6 Chinese EVA 2 Milestones 2.1 Capability milestones 2.2 Personal cumulative duration records 2.3 National, ethnic and gender firsts 3 Commemoration 4 Designations 5 Camp - out procedure 6 See also 7 References 8 External links Development History NASA planners invented the term extravehicular activity ( abbreviated with the acronym EVA ) in the early 1960s for the Apollo program to land men on the Moon, because the astronauts would leave the spacecraft to collect lunar material samples and deploy scientific experiments. To support this, and other Apollo objectives, the Gemini program was spun off to develop the capability for astronauts to work outside a two - man Earth orbiting spacecraft. However, the Soviet Union was fiercely competitive in holding the early lead it had gained in manned spaceflight, so the Soviet Communist Party, led by Nikita Khrushchev, ordered the conversion of its single - pilot Vostok capsule into a two - or three - person craft named Voskhod, in order to compete with Gemini and Apollo. The Soviets were able to launch two Voskhod capsules before U.S. was able to launch its first manned Gemini. The Voskhod 's avionics required cooling by cabin air to prevent overheating, therefore an airlock was required for the spacewalking cosmonaut to exit and re-enter the cabin while it remained pressurized. By contrast, the Gemini avionics did not require air cooling, allowing the spacewalking astronaut to exit and re-enter the depressurized cabin through an open hatch. Because of this, the American and Soviet space programs developed different definitions for the duration of an EVA. The Soviet ( now Russian ) definition begins when the outer airlock hatch is open and the cosmonaut is in vacuum. An American EVA began when the astronaut had at least his head outside the spacecraft. The USA has changed its EVA definition since. First spacewalk Alexei Leonov performs the first spacewalk during Voskhod 2 ( March 1965 ) The first EVA was performed on March 18, 1965, by Soviet cosmonaut Alexey Leonov, who spent 12 minutes outside the Voskhod 2 spacecraft. Carrying a white metal backpack containing 45 minutes worth of breathing and pressurization oxygen, Leonov had no means to control his motion other than pulling on his 15.35 m ( 50.4 ft ) tether. After the flight, he claimed this was easy, but his space suit ballooned from its internal pressure against the vacuum of space, stiffening so much that he could not activate the shutter on his chest - mounted camera. At the end of his space walk, the suit stiffening caused a more serious problem : Leonov had to re-enter the capsule through the inflatable cloth airlock, 1.2 m ( 3 ft 11 in ) in diameter and 2.5 m ( 8 ft 2 in ) long. He improperly entered the airlock head - first and got stuck sideways. He could not get back in without reducing the pressure in his suit, risking `` the bends ''. This added another 12 minutes to his time in vacuum, and he was overheated by 1.8 ° C ( 3.2 ° F ) from the exertion. It would be almost four years before the Soviets tried another EVA. They misrepresented to the press how difficult Leonov found it to work in weightlessness and concealed the problems encountered until after the end of the Cold War. Project Gemini Ed White performs the first American spacewalk during Gemini IV ( June 1965 ). The first American spacewalk was performed on June 3, 1965, by Ed White from the second manned Gemini flight, Gemini 4, for 21 minutes. White was tethered to the spacecraft, and his oxygen was supplied through a 25 - foot ( 7.6 m ) umbilical, which also carried communications and biomedical instrumentation. He was the first to control his motion in space with a Hand - Held Maneuvering Unit, which worked well but only carried enough propellant for 20 seconds. White found his tether useful for limiting his distance from the spacecraft but difficult to use for moving around, contrary to Leonov 's claim. However, a defect in the capsule 's hatch latching mechanism caused difficulties opening and closing the hatch, which delayed the start of the EVA and put White and his crewmate at risk of not getting back to Earth alive. No EVAs were planned on the next three Gemini flights. The next EVA was planned to be made by David Scott on Gemini 8, but that mission had to be aborted due to a critical spacecraft malfunction before the EVA could be conducted. Astronauts on the next three Gemini flights ( Eugene Cernan, Michael Collins, and Richard Gordon ), performed several EVAs, but none was able to successfully work for long periods outside the spacecraft without tiring and overheating. Cernan attempted but failed to test an Air Force Astronaut Maneuvering Unit which included a self - contained oxygen system. On November 13, 1966, Edwin `` Buzz '' Aldrin became the first to successfully work in space without tiring, on the Gemini 12 last flight. Aldrin worked outside the spacecraft for 2 hours and 6 minutes, in addition to two stand - up EVAs in the spacecraft hatch for an additional 3 hours and 24 minutes. Aldrin 's interest in scuba diving inspired the use of underwater EVA training to simulate weightlessness, which has been used ever since to allow astronauts to practice techniques of avoiding wasted muscle energy. First EVA crew transfer On January 16, 1969, Soviet cosmonauts Aleksei Yeliseyev and Yevgeny Khrunov transferred from Soyuz 5 to Soyuz 4, which were docked together. This was the second Soviet EVA, and it would be almost another nine years before the Soviets performed their third. Apollo lunar EVA Buzz Aldrin walks on the Moon during the pioneering Apollo 11 mission in 1969 American astronauts Neil Armstrong and Buzz Aldrin performed the first EVA on the lunar surface on July 21, 1969 ( UTC ), after landing their Apollo 11 Lunar Module spacecraft. This first Moon walk, using self - contained Portable Life Support Systems, lasted 2 hours 36 minutes. A total of fifteen Moon walks were performed among six Apollo crews, including Charles `` Pete '' Conrad, Alan Bean, Alan Shepard, Edgar Mitchell, David Scott, James Irwin, John Young, Charles Duke, Eugene Cernan, and Harrison `` Jack '' Schmitt. Cernan was the last Apollo astronaut to step off the surface of the Moon. Play media Charles Duke with a hammer on the lunar surface. Apollo 15 Command Module Pilot Al Worden made an EVA on August 5, 1971, on the return trip from the Moon, to retrieve a film and data recording canister from the Service Module. He was assisted by Lunar Module Pilot James Irwin standing up in the Command Module hatch. This procedure was repeated by Ken Mattingly and Charles Duke on Apollo 16, and by Ronald Evans and Harrison Schmitt on Apollo 17. Post-apollo EVAs The first EVA repairs of a spacecraft were made by Charles `` Pete '' Conrad, Joseph Kerwin, and Paul J. Weitz on May 26, June 7, and June 19, 1973, on the Skylab 2 mission. They rescued the functionality of the launch - damaged Skylab space station by freeing a stuck solar panel, deploying a solar heating shield, and freeing a stuck circuit breaker relay. The Skylab 2 crew made three EVAs, and a total of ten EVAs were made by the three Skylab crews. They found that activities in weightlessness required about 21⁄2 times longer than on Earth because many astronauts suffered spacesickness early in their flights. After Skylab, no more EVAs were made by the United States until the advent of the Space Shuttle program in the early 1980s. In this period, the Soviets resumed EVAs, making four from the Salyut 6 and Salyut 7 space stations between December 20, 1977, and July 30, 1982. When the United States resumed EVAs on April 7, 1983, astronauts started using an Extravehicular Mobility Unit ( EMU ) for self - contained life support independent of the spacecraft. STS - 6 was the first Space Shuttle mission during which a spacewalk was conducted. Also, for the first time, American astronauts used an airlock to enter and exit the spacecraft like the Soviets. Accordingly, the American definition of EVA start time was redefined to when the astronaut switches the EMU to battery power. Chinese EVA China became the third country to independently carry out an EVA on September 27, 2008 during the Shenzhou 7 mission. Chinese astronaut Zhai Zhigang completed a spacewalk wearing the Chinese - developed Feitian space suit, with astronaut Liu Boming wearing the Russian - derived Orlan space suit to help him. Zhai completely exited the craft, while Liu stood by at the airlock, straddling the portal. Milestones This section needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. ( February 2011 ) Capability milestones The first untethered spacewalk was made by American Bruce McCandless II on February 7, 1984, during Challenger mission STS - 41 - B, using the Manned Maneuvering Unit. He was subsequently joined by Robert L. Stewart during the 5 hour 55 minute spacewalk. A self - contained spacewalk was first attempted by Eugene Cernan in 1966 on Gemini 9A, but Cernan could not reach the maneuvering unit without tiring. The first metalwork in open space, consisting of welding, brazing and metal spraying, was conducted by Soviet cosmonauts Svetlana Savitskaya and Vladimir Dzhanibekov on July 25, 1984. A specially designed multipurpose tool was used to perform these activities during a 3 - hour, 30 minute EVA outside the Salyut 7 space station. The first three - person EVA was performed on May 13, 1992, as the third EVA of STS - 49, the maiden flight of Endeavour. Pierre Thuot, Richard Hieb, and Thomas Akers conducted the EVA to hand - capture and repair a non-functional Intelsat VI - F3 satellite. As of 2013 it was the only three - person EVA. The first EVA to perform an in - flight repair of the Space Shuttle was by American Steve Robinson on August 3, 2005, during `` Return to Flight '' mission STS - 114. Robinson was sent to remove two protruding gap fillers from Discovery 's heat shield, after engineers determined there was a small chance they could affect the shuttle upon re-entry. Robinson successfully removed the loose material while Discovery was docked to the International Space Station. The longest EVA as of 2007, was 8 hours and 56 minutes, performed by Susan Helms and James S. Voss on March 11, 2001. Untethered U.S. astronaut Bruce McCandless uses a manned maneuvering unit. Photo taken by Robert `` Hoot '' Gibson Capture of Intelsat VI in 1992 on STS - 49. This hand - capture of a satellite is the only EVA to date to be performed by three astronauts. Personal cumulative duration records Russian Anatoly Solovyev holds both the record for most EVAs and for the greatest cumulative duration spent in EVA ( 16 EVAs ; 82 hr and 22 min ). Michael Lopez - Alegria holds the American record ( 10 EVAs ; 67 hr and 40 min ). Christer Fuglesang holds the European ( non-Russian ) record ( 5 EVAs ; 31 hr and 55 min ). Peggy Whitson holds the record for most EVAs and most cumulative duration spent for a woman ( 10 EVAs, 60 hr and 21 min ). National, ethnic and gender firsts The first woman to perform an EVA was Soviet Svetlana Savitskaya on July 25, 1984, while aboard the Salyut 7 space station. Her EVA lasted 3 hours and 35 minutes. The first American woman to perform an EVA was Kathryn D. Sullivan on October 11, 1984, during Space Shuttle Challenger mission STS - 41 - G. The first EVA by a non-Soviet, non-American was made on December 9, 1988, by Jean - Loup Chrétien of France during a three - week stay on the Mir space station. The first EVA by a black African - American was on February 9, 1995, by Bernard A. Harris Jr... The first EVA by a Japanese astronaut was made on November 25, 1997, by Takao Doi during STS - 87. The first EVA by an Australian - born person was on March 13, 2001, by Andy Thomas ( although he is a naturalized US citizen ). The first EVA by a Scandinavian astronaut was made on December 12, 2006, by Christer Fuglesang. The first EVA by a Chinese astronaut was made on September 27, 2008, by Zhai Zhigang during Shenzhou 7 mission. The spacewalk, using a Feitian space suit, made China the third country to independently carry out an EVA. The first EVA by an Italian astronaut was made on July 9, 2013, by Luca Parmitano along with NASA Astronaut Chris Cassidy during Expedition 36 on the International Space Station. The first EVA by a British astronaut was on January 15, 2016, by Tim Peake. Although British - American Michael Foale carried out an EVA on February 9, 1995, he flew as an American astronaut in NASA 's program. International Space Station assembly EVA made during the STS - 116 mission. Robert Curbeam ( with red stripes ) together with Christer Fuglesang over Cook Strait, New Zealand. Anatoly Solovyev holds the world record for time spent during spacewalks : 82 + hours over 16 separate outings, seen here performing an EVA outside Mir Space Station in 1997 Commemoration The first spacewalk, made by Soviet cosmonaut Alexey Leonov, was commemorated in 1965 with several Eastern Bloc stamps ( see Alexey Leonov # Stamps ). Since the Soviet Union did not publish details of the Voskhod spacecraft at the time, the spaceship depiction in the stamps was purely fictional. The U.S. Post Office issued a postage stamp in 1967 commemorating Ed White 's first American spacewalk. The engraved image has an accurate depiction of the Gemini IV spacecraft and White 's space suit. Alexey Leonov, Voskhod 2, First Spacewalk U.S.S.R. commemorative issue of 1965 Accomplishments in Space U.S. Commemorative Issue of 1967 Designations NASA `` spacewalkers '' during the space shuttle program were designated as EV - 1, EV - 2, EV - 3 and EV - 4 ( assigned to mission specialists for each mission, if applicable ). Camp - out procedure For EVAs from the International Space Station, NASA now routinely employs a camp - out procedure to reduce the risk of decompression sickness. This was first tested by the Expedition 12 crew. During a camp out, astronauts sleep overnight in the airlock prior to an EVA, lowering the air pressure to 10.2 psi ( 70 kPa ), compared to the normal station pressure of 14.7 psi ( 101 kPa ). Spending a night at the lower air pressure helps flush nitrogen from the body, thereby preventing `` the bends ''. More recently astronauts have been using the In - Suit Light Exercise protocol rather than camp - out to prevent decompression sickness. See also Spaceflight portal List of cumulative spacewalk records List of International Space Station spacewalks List of Mir spacewalks List of spacewalkers List of spacewalks 2000 -- 2014 List of spacewalks and moonwalks 1965 -- 1999 Omega Speedmaster Suitport References Jump up ^ NASA ( 2007 ). `` Stand - Up EVA ''. NASA. Retrieved October 21, 2008. Jump up ^ Siddiqi, Asif A. ( 2003a ). Sputnik and the Soviet Space Challenge. Gainesville : University Press of Florida. ISBN 0 - 8130 - 2627 - X. Jump up ^ Walking to Olympus, p. ix. ^ Jump up to : Portree, David S.F. ; Treviño, Robert C. ( October 1997 ). `` Walking to Olympus : An EVA Chronology '' ( PDF ). Monographs in Aerospace History Series # 7. NASA History Office. pp. 1 -- 2. Retrieved 2015 - 07 - 30. Jump up ^ Rincon, Paul ; Lachmann, Michael ( October 13, 2014 ). `` The First Spacewalk How the first human to take steps in outer space nearly did n't return to Earth ''. BBC News. BBC News. Archived from the original on February 16, 2016. Retrieved 2014 - 10 - 19. Jump up ^ Oral History Transcript / James A. McDivitt / Interviewed by Doug Ward / Elk Lake, Michigan -- June 29, 1999. Jump up ^ Skylab Reuse Study, p. 3 - 53. Martin Marietta and Bendix for NASA, September 1978. Jump up ^ Mark Wade. `` Encyclopedia Astronautica Salyut 7 EP - 4 ''. Astronautix.com. Archived from the original on November 11, 2011. Retrieved November 18, 2011. Jump up ^ `` A pictorial history of welding as seen through the pages of the Welding Journal ''. American Welding Society. Retrieved November 18, 2011. Jump up ^ `` Space welding anniversary ''. RuSpace.com. July 16, 2009. Retrieved November 18, 2011. Jump up ^ NASA ( 2001 ). `` STS - 49 ''. NASA. Retrieved December 7, 2007. Jump up ^ Facts about spacesuits and spacewalks ( NASA.gov ) Archived 2013 - 06 - 03 at the Wayback Machine. ^ Jump up to : William Harwood ( 2007 ). `` ISS EVA Statistics ''. CBS News. Retrieved November 8, 2007. ^ Jump up to : Rincon, Paul ( January 5, 2016 ). `` Tim Peake on historic spacewalk ''. BBC News. Retrieved 2016 - 09 - 10. Jump up ^ Scotts Specialized Catalogue of United States Postage Stamps Jump up ^ `` Extravehicular Activity Radiation Monitoring ( EVARM ) ''. NASA. 2001 - 10 - 01. Jump up ^ `` Extravehicular Activity Radiation Monitoring ( EVARM ) ''. Marshall Space Flight Center. 2001 - 10 - 01. ^ Jump up to : NASA ( 2006 ). `` Preflight Interview : Joe Tanner ''. NASA. Retrieved February 8, 2008. Jump up ^ NASA. `` International Space Station Status Report # 06 - 7 ''. NASA. Retrieved 2006 - 02 - 17. Jump up ^ NASA. `` Pass the S'mores Please ! Station Crew ' Camps Out ' ''. NASA. Retrieved 2006 - 04 - 01. Jump up ^ NASA. `` EVA Physiology ''. NASA. Retrieved 2018 - 04 - 27. Jump up ^ Brady, Timothy K. and Polk, James D. `` In - Suit Light Exercise ( ISLE ) Prebreathe Protocol Peer Review Assessment. Volume 1 ''. NASA. Retrieved 2018 - 04 - 27. CS1 maint : Multiple names : authors list ( link ) External links Wikimedia Commons has media related to Extravehicular activity. NASA JSC Oral History Project Walking to Olympus : An EVA Chronology PDF document. Astronaut space walk picture NASDA Online Space Notes Apollo Extravehicular mobility unit. Volume 1 : System description -- 1971 ( PDF document ) Apollo Extravehicular mobility unit. Volume 2 : Operational procedures -- 1971 ( PDF document ) Skylab Extravehicular Activity Development Report -- 1974 ( PDF document ) Analysis of the Space Shuttle Extravehicular Mobility Unit -- 1986 ( PDF document ) NASA Space Shuttle EVA tools and equipment reference book -- 1993 ( PDF document ) Preparing for an American EVA on the ISS -- 2006 Space suits Models USSR / Russia SK - 1 Berkut Yastreb Krechet - 94 Strizh Sokol Orlan United States Navy Mark IV Gemini MOL A7L Shuttle Ejection Escape Suit LES ACES EMU China Shenzhou IVA Haiying Feitian Developmental Mark III I - Suit Space activity suit Constellation Space Suit Z series Components Hard Upper Torso ( HUT ) Liquid Cooling and Ventilation Garment ( LCVG ) Maximum Absorbency Garment ( MAG ) Primary Life Support System ( PLSS ) Snoopy cap Thermal Micrometeoroid Garment ( TMG / ITMG ) Related topics Extravehicular activity ( EVA ) Astronaut propulsion unit Environmental suit Pressure suit Spaceflight General Astrodynamics History Timeline Space Race Asian Space Race Records Accidents and incidents Space policy China European Union India Japan Russia Soviet Union United States Space law Outer Space Treaty Rescue Agreement Space Liability Convention Registration Convention Moon Treaty Private spaceflight Applications Astronomy Earth observation Archaeology Imagery and mapping Reconnaissance Weather and environment monitoring Satellite communications Internet Radio Telephone Television Satellite navigation Commercial use of space Space launch market competition Militarisation of space Space architecture Space exploration Space research Space technology Space weather Human spaceflight General Astronaut Life support system Animals in space Bioastronautics Space suit Extravehicular activity Weightlessness Space toilet Space tourism Space colonization Programs Vostok Mercury Voskhod Gemini Soyuz Apollo Skylab Apollo -- Soyuz Space Shuttle Mir Shuttle -- Mir International Space Station Shenzhou Tiangong Health issues Effect of spaceflight on the human body Space adaptation syndrome Health threat from cosmic rays Psychological and sociological effects of spaceflight Space and survival Space medicine Space nursing Spacecraft Launch vehicle Rocket Spaceplane Robotic spacecraft Satellite Space probe Lander Rover Self - replicating spacecraft Spacecraft propulsion Rocket engine Electric propulsion Solar sail Gravity assist Destinations Sub-orbital Orbital Geocentric Geosynchronous Interplanetary Interstellar Intergalactic Space launch Direct ascent Escape velocity Expendable and reusable launch systems Launch pad Non-rocket spacelaunch Spaceport Ground segment Flight controller Ground station ( Pass ) Mission control center Space agencies CoNAE ASA AEB CSA CNSA ESA CNES DLR ISRO LAPAN ISA ISA ASI JAXA NADA KARI SUPARCO Roscosmos SNSB SSAU UKSA NASA Portal WikiProject Retrieved from `` https://en.wikipedia.org/w/index.php?title=Extravehicular_activity&oldid=841711752 '' Categories : Extravehicular activity Human spaceflight Russian inventions Hidden categories : Webarchive template wayback links CS1 maint : Multiple names : authors list All articles with unsourced statements Articles with unsourced statements from February 2014 Articles with unsourced statements from February 2011 Articles needing additional references from February 2011 All articles needing additional references Articles containing potentially dated statements from 2013 All articles containing potentially dated statements Pages using div col without cols and colwidth parameters Articles containing video clips Talk Contents About Wikipedia Afrikaans Български Català Čeština Dansk Deutsch Ελληνικά Español Esperanto Euskara فارسی Français 한국어 हिन्दी Italiano עברית Latviešu Lëtzebuergesch Magyar मैथिली Bahasa Melayu Nederlands 日本 語 Norsk Norsk nynorsk Occitan Polski Português Română Русский Simple English Slovenčina Српски / srpski Suomi Svenska தமிழ் Türkçe Українська 中文 31 more Edit links This page was last edited on 17 May 2018, at 15 : 22. 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Question: what is a mission performed outside the space station
Answer: Extravehicular activity (EVA)