[DOC] [TLE] Missions to Venus and Mercury | The Planetary Society [PAR] As one of the first planets to be visited by spacecraft, Venus witnessed many ... 
Venus is a necessary waypoint for missions to Mercury, of which there have been 
only ... Akatsuki successfully entered orbit around Venus using only its attitude... [DOC] [TLE] List of landings on extraterrestrial bodies - Wikipedia [PAR] This is a list of all spacecraft landings on other planets and bodies in the Solar 
System, ... and return to Earth. All lunar astronaut landings have fulfilled the 
Kennedy challenge of a safe return to Earth. .... Sent signal for only 20 seconds 
after landing. .... First lander visited by a later manned mission (Apollo 12). 
Surveyor 4... [DOC] [TLE] Hello, Pluto! NASA Spacecraft Makes Historic Dwarf Planet Flyby [PAR] Jul 14, 2015 ... NASA Spacecraft Makes Historic Dwarf Planet Flyby ... solar system's traditionally 
recognized planets have now been visited by a robotic spacecraft ... "It's an 
unusually tortured history," said Stern, who has been a driving force ... After all, 
Pluto is just one of thousands of objects  albeit the largest and most... [DOC] [TLE] NASA - MESSENGER: The Extreme Machine | NASA [PAR] Only one NASA spacecraft has visited Mercury and that was Mariner 10 in 1974 
and 1975. It was programmed to fly by the planet three times to take images of its 
..... typically thought of as airless, yet we have known since the time of the Apollo
... [DOC] [TLE] Space Missions and Space Craft - The Nine Planets [PAR] The following list contains only selected spacecraft of interest to planetary 
science ... Unable to collect the Sun's energy for power from its solar panels, the 
probe... [DOC] [TLE] What planets have been visited by spacecrafts? [PAR] The planets that have been visited by spacecrafts are: Mercury, Venus, Mars, ... 
This means that the only planet in our Solar System that has not yet been visited 
is Pluto. ... Actually, the New Horizons spacecraft is on it's way to visit Pluto, and 
is... [DOC] [TLE] Why Go To Pluto? - New Horizons - The Johns Hopkins University ... [PAR] Then, as part of an extended mission, New Horizons could visit one or more 
objects in ... Our solar system contains three zones: the inner, rocky planets; the 
gas giant ... among its highest priority planetary mission rankings for the coming 
decade. ... worlds combined - yet, no spacecraft has been sent to a planet in this 
class. [DOC] [TLE] Space Today Online - Solar System - Exploring Neptune - Neptune ... [PAR] Until now, the only spacecraft to visit Neptune was Voyager 2, which flew by the 
giant planet in 1989. Voyager 2, which has traveled to more planets than any 
other probe in ... One of its first duties would be the release of two probes to fall 
down through ... The 2002 and 2003 Neptune moon discoveries have yet to be 
named. [DOC] [TLE] How many spacecraft have been to Mercury? | Cool Cosmos [PAR] Two spacecraft have visited the planet Mercury so far. The first was ... Mariner 10 
also discovered Mercury's thin atmosphere and detected its magnetic field. [DOC] [TLE] NASA's New Horizons probe is visiting Pluto  and just sent back its ... [PAR] Apr 14, 2015 ... No spacecraft has ever visited Pluto. That's going to ... Mars is the second-closest 
planet to Earth and, in many ways, the most similar. As long as ...... The history of 
Satanic Panic in the U.S.  and why it's not over yet. Updated... [DOC] [TLE] Have Humans Visited Mercury? - Universe Today [PAR] Dec 24, 2015 ... No, Mercury has been visited by spacecraft from Earth, but no human ... Maybe 
some day in the future humans will visit Mercury, but it hasn't happened yet. ... a 
whole episode of Astronomy Cast that's just about planet Mercury. ... as a 
planetary gravity assisted flyby used to alter its speed and trajectory - [DOC] [TLE] What is the only planet in our solar system that has not been visited ... [PAR] Mar 22, 2009 ... What

Question: It's the only planet that has yet to be visited by a spacecraft
Answer: Pluto