Related by context. Frequent words. (Click for all words.) 63 spacecraft 62 orbiter 59 undock 58 thrusters 58 thruster 57 Space Shuttle Atlantis 57 lunar orbit 55 orbit 55 Ares IX 55 Space Shuttle 54 Shuttle astronauts 54 Shuttle Atlantis 54 space shuttle 54 International Space Station 54 Space Station 54 orbital 54 Space Shuttle Program 54 Shuttle Endeavour 54 NASA 53 Soyuz 53 ISS 53 shuttle 53 liftoff 53 propellant 53 undocking 53 Space Shuttle Endeavour 52 Orion spacecraft 52 Shuttle Launch 52 space shuttle Discovery 52 Kaleri 52 Earth orbit 51 Space Shuttle Discovery 51 shuttle Discovery 51 Launch Complex 51 geosynchronous orbit 51 Dragon spacecraft 51 shuttle Atlantis 51 Yurchikhin 51 Shuttle Discovery 51 Orion capsule 51 Launch Pad #A 51 Payload 51 shuttle Endeavour 50 spacewalk 50 Endeavour 50 spacecrafts 50 space shuttle Endeavour 50 Atlas V 50 propellants 50 STS 50 Krikalev 50 undocked 50 Orbiter 50 Automated Transfer Vehicle 50 Spacecraft 49 JWST 49 geostationary orbit 49 Mission Control 49 blastoff 49 Lee Archambault 49 liquid hydrogen 49 Nasa 49 CEV 49 orbiting 49 payload 49 circular orbit 49 Space shuttle Atlantis 49 Shuttle 49 Soyuz TMA 49 Cape Canaveral Air Force 49 Kwajalein Atoll 48 NASA Space Shuttle 48 spacewalkers 48 cryogenic engine 48 astronauts 48 impactor 48 orbiters 48 Malenchenko 48 geostationary 48 space shuttle Atlantis 48 payloads 48 Kononenko 48 robotic spacecraft 48 lander 48 Soyuz rocket 48 LCROSS 48 Soyuz capsule 48 Kennedy Space 48 GOCE 47 Discovery astronauts 47 hydrazine 47 Sriharikota 47 polar orbit 47 reentry 47 aboard Endeavour 47 lunar lander 47 Cape Canaveral 47 Bill Gerstenmaier NASA 47 shuttle disintegrated 47 Ariane 5 47 VAB