Related by context. Frequent words. (Click for all words.) 52 lander 49 robotic arm 49 orbiter 47 spacecraft 46 Ares IX 44 Space Shuttle Discovery 44 thruster 43 Space Shuttle Atlantis 43 shuttle robotic arm 43 payload bay 43 Orbiter 42 unwrap 42 Huygens probe 42 undocking 41 microgravity 41 thrusters 41 Space Shuttle Endeavour 41 weightlessness 41 heat shield 41 NASA 41 Mission Control 41 shuttle Endeavour 41 International Space Station 41 spacewalkers 41 lunar orbit 41 Payload 41 space shuttle Discovery 41 space shuttle Atlantis 40 LCROSS 40 Huygens 40 unmanned spacecraft 40 Discovery astronauts 40 JAXA 40 Astronauts 40 spacewalker 40 Cape Canaveral Fla. 39 shuttle Atlantis 39 lunar lander 39 Dextre 39 rover 39 payload 39 spacewalk 39 orbit 39 Shuttle Discovery 39 undock 39 Mars rover 39 space shuttle 39 Space Station 38 shuttle Discovery 38 Melvill 38 commander Rick Sturckow 38 liftoff 38 unbuckle 38 Endeavour 38 Cape Canaveral Air Force 38 Martian soil 38 X #B 38 gyroscope 38 solid rocket boosters 38 X #A 38 Ares 38 lunar surface 38 Mars rovers 38 NASA Jet Propulsion Laboratory 38 Nasa 37 Shuttle Endeavour 37 launcher 37 Spacecraft 37 Parazynski 37 Atlantis astronauts 37 shuttle 37 blastoff 37 impactor 37 orbital 37 Jet Propulsion Laboratory 37 Spacewalk 37 ISS 37 Soyuz 37 Atlantis 37 space shuttle Endeavour 36 Earth orbit 36 gap fillers 36 thermal blanket 36 zero gravity 36 NASA Jet Propulsion 36 glider 36 lunar module 36 Ares V 36 Space shuttle Atlantis 36 wiggle 36 Space Shuttle 36 Mars Odyssey 36 Vinogradov 36 Mars Rover 36 orbiting 35 Hubble Space Telescope 35 Gerstenmaier 35 polar orbit 35 Phoenix Mars Lander 35 Soyuz capsule 35 airlock