Related by context. Frequent words. (Click for all words.) 68 liftoff 60 shuttle Discovery 59 space shuttle Discovery 58 space shuttle 57 orbiter 57 blastoff 56 NASA 55 shuttle missions 55 astronauts 55 shuttle Endeavour 55 space shuttle Endeavour 55 spacewalk 54 heat shield 54 shuttle Atlantis 54 Space Shuttle Discovery 54 insulating foam 54 shuttle 53 JAXA 53 spacecraft 53 Shuttle Discovery 53 Discovery astronauts 53 space shuttle Atlantis 52 thermal tile 51 Space Shuttle Atlantis 51 Mission Control 51 thermal tiles 50 Nasa 50 Space Shuttle Endeavour 50 Gerstenmaier 50 Endeavour astronauts 49 Cape Canaveral Fla. 49 astronauts aboard 49 Shuttle Endeavour 49 Endeavour 48 Atlantis astronauts 48 Ares IX 48 foam insulation 48 spacewalkers 48 International Space Station 48 orbital debris 48 Soyuz capsule 48 Liftoff 47 director Mike Leinbach 47 Shuttle Atlantis 47 undocking 47 Hubble Space Telescope 47 LCROSS 47 orbiting laboratory 47 lunar landing 46 NASA Administrator 46 flyby 46 Dittemore 46 Space shuttle Discovery 46 Space Shuttle 46 X #A 46 Spacewalk 46 Soyuz 46 orbit 46 shuttle astronauts 46 spaceflight 46 Atlantis 46 shuttle fleet 45 Columbia disintegrated 45 manned spacecraft 45 spacewalking astronauts 45 Hayabusa 45 thermal blanket 45 Suffredini 45 spacewalks 45 Columbia Accident Investigation 45 orbiting 45 manned spaceflight 45 astronaut 44 orbiters 44 Shuttle 44 spacewalker 44 Parazynski 44 spacewalking 43 lander 43 payload bay 43 Hubble telescope 43 orbiting outpost 43 space shuttles 43 undock 43 Soyuz spacecraft 43 Challenger exploded 43 shootdown 43 Phoenix lander 43 Space shuttle Atlantis 43 thruster 42 human spaceflight 42 Leinbach 42 STS 42 flybys 42 LeRoy Cain 42 aboard Endeavour 42 X #B 42 manned missions 42 Fincke 42 liquid hydrogen 42 gap filler