Related by context. Frequent words. (Click for all words.) 67 orbiter 64 space shuttle 63 space shuttle Discovery 63 spacecraft 62 heat shield 61 insulating foam 60 space shuttle Endeavour 60 shuttle Discovery 59 shuttle 59 Space Shuttle Discovery 58 Cape Canaveral Fla. 56 shuttle Atlantis 56 NASA 56 Endeavour 56 undocking 56 shuttle Endeavour 56 Mission Control 56 orbit 55 astronauts 55 space shuttle Atlantis 54 Kennedy Space 54 shuttle missions 54 spacewalk 54 Liftoff 53 foam insulation 52 Cape Canaveral 52 International Space Station 51 Cape Canaveral Air Force 51 director Mike Leinbach 51 Space Shuttle 50 booster rocket 50 thermal tiles 50 flyby 50 Discovery astronauts 50 Nasa 50 takeoff 49 Atlantis 49 Soyuz 49 Space shuttle Discovery 49 JAXA 48 spacewalkers 48 astronauts aboard 48 Leinbach 48 shuttle astronauts 48 orbiting 48 Space shuttle Endeavour 48 thermal blanket 48 launch pad 48 Space shuttle Atlantis 48 liquid hydrogen 47 LCROSS 47 astronaut 47 Columbia disintegrated 47 Atlas V 47 shuttle fleet 47 orbiters 46 Baikonur Cosmodrome 46 CAPE CANAVERAL Fla. 46 Parazynski 46 liquid oxygen 46 Taepodong 2 46 Atlantis astronauts 46 spaceflight 46 reentry 46 spaceship 46 Soyuz TMA 45 Orbiter 45 undock 45 Hubble Space Telescope 44 space shuttles 44 Vandenberg Air Force Base 44 Sea Launch 44 Baikonur cosmodrome 44 payload 44 orbital 44 spacewalks 43 foam 43 lander 43 Ariane 5 43 Hubble 43 Space Station 43 Huygens 43 NASA Administrator 43 Shuttle 43 ISRO 43 Soyuz spacecraft 43 Cassini 43 STS 42 Chang'e 42 Chandrayaan 42 Astronauts 42 Gehman 42 docking 42 rocket 42 thrusters 42 Fincke 42 human spaceflight 41 SpaceX 41 Spacecraft 41 Earth orbit 41 orbiting outpost