Related by context. Frequent words. (Click for all words.) 64 Ares IX rocket 59 spacecraft 58 Taurus XL rocket 58 spaceplane 58 Dragon capsule 58 SpaceX Falcon 9 58 Ariane rocket 57 pad #A 56 space shuttle 56 Orion spacecraft 55 X #A 54 orbiter 54 rocket 54 spaceship 54 manned spacecraft 54 Stardust spacecraft 54 Shenzhou VII 53 Space Shuttle Discovery 53 robotic spacecraft 53 Soyuz rocket 53 scramjet 53 orbit 53 spacecrafts 53 Mars rover Opportunity 52 Orion capsule 52 Space Shuttle Atlantis 52 Ares rocket 52 PSLV C# 52 Messenger spacecraft 51 unmanned spacecraft 51 rocket boosters 51 Shuttle Atlantis 51 Baikonur Kazakhstan 51 unmanned 51 Shuttle Endeavour 50 space shuttle Discovery 50 Shuttle Discovery 50 manned spaceship 50 Bulava missile 50 Mars orbiter 50 shuttle Discovery 50 ion propulsion 50 hypersonic flight 50 rocketship 50 Discovery STS 50 lunar orbiter 50 Russian Soyuz rocket 50 New Horizons spacecraft 50 Earth orbit 49 space shuttles 49 lunar orbit 49 Launch Vehicle 49 cryogenic engine 49 X #B 49 space shuttle Endeavour 49 orbiting complex 49 Space shuttle Discovery 49 Discovery liftoff 49 rocket booster 49 shuttle Atlantis 49 vertical takeoff 49 NASA 49 lander 48 Virgin Atlantic GlobalFlyer 48 Mike Melvill 48 Space Shuttle Endeavour 48 Mars Pathfinder 48 interplanetary spacecraft 48 spacecraft orbiting 48 shuttle 48 airship 48 rover Opportunity 48 orbiting telescope 48 Discovery payload bay 48 geosynchronous orbit 47 Polar Lander 47 Space shuttle Atlantis 47 suborbital flight 47 Soyuz craft 47 unmanned lunar 47 lunar module 47 sub orbital 47 Soyuz capsule 47 Orbiting Carbon Observatory 47 Phoenix Mars lander 47 solid rocket boosters 47 Shenzhou V 47 Dragon spacecraft 47 Cape Canaveral 47 Mars rover Spirit 47 geostationary 47 Russian Soyuz TMA 47 Nasa 47 Soyuz 47 Ares IX 47 Hubble servicing 46 astronauts 46 Opportunity rover 46 Soviet cosmonaut Yuri Gagarin 46 Soyuz spacecraft 46 remotely piloted