Related by context. Frequent words. (Click for all words.) 62 lunar module 58 Edwin Buzz Aldrin 58 Lunar Module 56 Gene Cernan 56 Soviet cosmonaut Yuri Gagarin 55 lunar orbit 55 rover Spirit 55 asteroid Itokawa 54 lunar surface 53 Ares IX rocket 53 aboard Atlantis 53 spacecraft 53 NASA Stardust spacecraft 53 Mars rovers Spirit 53 Tranquility Base 52 orbit insertion 52 orbiter 52 orbiting 52 spaceship 51 robotic explorers 51 Galileo spacecraft 51 Messenger spacecraft 51 lunar lander 51 Launch Pad #B 51 Stardust spacecraft 51 robotic spacecraft 51 Opportunity rover 51 orbit 51 moon 50 spacecraft orbiting 50 Ron Garan 50 astronaut Leopold Eyharts 50 Hayabusa probe 50 Discovery payload bay 50 Commander Eileen 50 Space Shuttle Endeavor 50 Apollo missions 50 Russian Gennady Padalka 50 Shuttle astronauts 50 circular orbit 50 lander 50 shuttle disintegrated 50 Cernan 50 Baikonur Kazakhstan 50 pad #A 49 Mars Odyssey orbiter 49 innermost planet 49 twin rover Spirit 49 New Horizons spacecraft 49 rover Opportunity 49 X ray telescope 49 Soyuz capsule carrying 49 Voyager spacecraft 49 astronauts 49 orbiting Saturn 49 lunar soil 49 unmanned lunar 49 robotic probes 49 cosmonaut Yuri Gagarin 49 lunar landing 49 Shuttle Discovery 48 unmanned spacecraft 48 interplanetary spacecraft 48 Harmony module 48 Sensing Satellite LCROSS 48 International Space Station 48 Cassini orbiter 48 NASA Mars rover 48 Dragon capsule 48 taikonaut 48 crewmates 48 LCROSS mission 48 Alexander Kaleri 48 NASA astronaut corps 48 Eugene Cernan 48 Space Shuttle Atlantis 48 Space Shuttle Discovery 48 Discovery STS 48 manned spacecraft 48 NASA Cassini 48 planet Uranus 48 Budarin 47 geosynchronous orbit 47 Mars Pathfinder 47 commander Fyodor Yurchikhin 47 Oleg Skripochka 47 Gravity Probe B 47 orbiting complex 47 Atlantis undocked 47 Itokawa 47 deorbit 47 JPL manages 47 SIRTF 47 Taurus XL rocket 47 Apollo lunar 47 rovers Spirit 47 infrared telescope 47 shuttle Atlantis 47 orbited Earth 47 particle detector 47 Soyuz capsule