Related by context. Frequent words. (Click for all words.) 66 heat shield 56 thermal tiles 55 foam insulation 55 orbiter 52 insulating foam 52 space shuttle Discovery 52 thermal blanket 52 shuttle Discovery 51 Discovery astronauts 51 liftoff 51 shuttle robotic arm 49 Gerstenmaier 49 shuttle Atlantis 48 Space Shuttle Atlantis 48 shuttle astronauts 48 Endeavour astronauts 48 payload bay 48 spacecraft 46 Space shuttle Discovery 46 spacewalking astronauts 46 space shuttle Atlantis 46 shuttle Endeavour 46 Atlantis astronauts 46 Space shuttle Atlantis 46 Shuttle Discovery 46 Space Shuttle Discovery 46 lunar surface 45 Martian surface 45 Dittemore 45 shuttle 45 Soyuz capsule 45 spacewalkers 45 Parazynski 45 astronauts 44 aboard Endeavour 44 Space Shuttle Endeavour 44 foam 43 Tracy Caldwell Dyson 43 space shuttle Endeavour 43 orbiting outpost 43 atmospheric gases 43 spacesuits 43 Columbia disintegrated 43 orbital debris 42 spacewalk 42 orbiting laboratory 42 space shuttle 42 undocking 42 orbiters 42 Soyuz 42 booster rockets 42 Endeavour 42 lunar orbit 42 shuttle missions 41 Columbia Accident Investigation 41 Shuttle Endeavour 41 Martian atmosphere 41 astronauts aboard 41 orbiting lab 41 gap filler 41 Soyuz TMA 41 Mastracchio 40 Huygens 40 spacewalker 40 NASA 40 lander 40 robotic arm 40 LCROSS 40 solid rocket boosters 40 Atlantis 40 JAXA 39 hydrazine 39 Wakata 39 Grunsfeld 39 Cape Canaveral Fla. 39 Fossum 39 Mars Reconnaissance Orbiter 39 polar orbit 39 Cassini 39 Perminov 39 Suffredini 39 Sharipov 39 Hubble Space Telescope 39 magnetosphere 39 Meridiani Planum 39 Orbiter 39 Michael Lopez Alegria 39 Fincke 38 orbit 38 Kostelnik 38 Saturn rings 38 Nasa 38 International Space Station 38 spacewalks 38 blastoff 38 Mission Control 38 ammonia tank 38 Hubble 38 Space shuttle Endeavour 38 Padalka 38 Tempel 1