Related by context. Frequent words. (Click for all words.) 66 capsules 54 spacecraft 50 spacesuit 47 spaceship 47 lander 47 astronauts 47 lunar orbit 46 orbiter 45 orbit 45 airlock 45 lunar landing 45 lunar surface 44 Capsule 44 canister 43 Soyuz 42 spacesuits 42 Martian atmosphere 41 Martian surface 41 impactor 41 manned spacecraft 41 astronaut 41 vial 41 shaft 41 Soyuz capsule 41 shoebox 40 space shuttle 40 Soyuz spacecraft 40 Soyuz TMA 40 Gagarin 39 Huygens 39 cavity 39 robotic arm 39 compartment 39 trapped miners 39 weightlessness 39 mine shaft 39 Yuri Gagarin 39 rover 39 shuttle Endeavour 38 cavern 38 Apollo astronauts 38 Martian soil 38 blastoff 38 canisters 38 cosmonauts 38 Baikonur Cosmodrome 38 freeze dried 38 Mars rover 38 hydrazine 38 Ares IX 38 International Space Station 38 Space Shuttle Discovery 38 aboard Endeavour 38 shuttle astronauts 38 Astronaut 38 zero gravity 37 orbiting laboratory 37 heat shield 37 airship 37 jar 37 Alan Shepard 37 NASA astronaut 37 Orbiter 37 Shenzhou 37 Spacecraft 37 Baikonur cosmodrome 37 booster rockets 37 Malenchenko 37 payload 37 booster rocket 37 crevice 36 shuttle Atlantis 36 Astronauts 36 Padalka 36 Discovery astronauts 36 shuttle Discovery 36 flying saucer 36 Red Planet 36 lunar probe 36 Cape Canaveral 36 asteroid 36 payload bay 36 Neil Armstrong 36 microgravity 36 Nasa 36 propellant 36 LCROSS 36 space shuttle Discovery 36 Space Shuttle Endeavour 35 shuttle 35 cosmonaut 35 Chilean miners 35 outer space 35 Shuttle Discovery 35 glass jar 35 MESSENGER 35 Mars 35 comet 35 girder 35 telescope 35 oxygen masks