Hint
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Answer
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The only Mercury astronaut who did not fly a Mercury mission
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Donald "Deke" Slayton
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Instead, that astronaut flew on this mission (1975)
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Apollo-Soyuz Test Project
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Performed history's first spacewalk (USSR 1965)
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Alexei Leonov
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Performed history's second spacewalk (USA 1965)
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Ed White
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Apollo 12 astronauts landed within 200 meters (657 feet) of this earlier, unmanned lander (1969)
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Surveyor 3
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The only astronaut to fly Mercury, Gemini and Apollo missions*
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Wally Schirra
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The only astronaut to fly Gemini, Apollo and Space Shuttle missions
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John Young
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The only Mercury astronaut to walk on the moon (1971)
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Alan Shepard
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The only astronaut to fly both Mercury and Space Shuttle missions
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John Glenn
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Three astronauts have flown to the Moon twice. Only one did not walk on its surface
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Jim Lovell
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First female cosmonaut (1963)
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Valentina Tereshkova
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First female astronaut (1983)
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Sally Ride
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In lunar orbit since 2009, this satellite has photographed all of the Apollo landing sites and much more
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Lunar Reconnaissance Orbiter (LRO)
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First successful Mars landers (1976)**
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Viking 1 & 2
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First robotic rover deployed on Mars (1997)
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Sojourner
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These twin Mars rovers operated for years beyond their original 90-day mission plans (2004 - )
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Spirit and Opporunity
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This Soviet program returned photos (and sound!) from the surface of Venus
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Venera
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Soviet robotic lunar rover and soil sample return program
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Lunokhod
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China's unmanned Chang'e-4 mission was the first to land here (2019) ***
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Far side of the Moon
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This nuclear powered Mars rover has been operating there since 2012
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Curiosity
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Mariner 10 flew by Mercury in 1974. This spacecraft was the first to go into orbit around that planet (2011)
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MESSENGER
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These twin spacecraft performed the first Jupiter flyby missions (1973, 1974)
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Pioneer 1 & 2
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This mission was the first to flyby an asteroid (1991) and later orbited Jupiter and its moons for 8 years
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Galileo
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Launched in 1977, this spacecraft visited Jupiter, Saturn, Uranus and Neptune and is still sending back data from interstellar space
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Voyager 2
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This spacecraft flew by Pluto and its moons in 2015 and the ancient Kuiper Belt object, Ultima Thule, in 2018
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New Horizons
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This joint NASA-European Space Agency (ESA) mission was the first to orbit Saturn (2004)
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Cassini
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That mission delivered this ESA-built lander to the surface of Titan, Saturn's largest moon
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Huygens
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This spacecraft used its ion engine to orbit the asteroids Vesta (2011) and Ceres (2015)
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Dawn
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Neil Armstrong was the first man on the Moon. This astronaut was the last... so far (1972)
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Gene Cernan
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Named for a Peanuts cartoon character, the ascent stage of Apollo 10's Lunar Module has been orbiting the Sun since 1969
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Snoopy
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