Related by context. Frequent words. (Click for all words.) 67 heat shield 65 thermal tiles 58 insulating foam 58 foam insulation 56 orbiter 54 thermal blanket 51 gap filler 51 space shuttle Discovery 51 liftoff 49 Space Shuttle Discovery 49 shuttle Discovery 49 Discovery astronauts 49 NASA 49 foam 49 Dittemore 48 shuttle Atlantis 48 shuttle Endeavour 48 spacecraft 48 gap fillers 48 Endeavour astronauts 47 space shuttle 47 shuttle 47 Gerstenmaier 47 orbital debris 46 nose cone 46 JAXA 46 Shuttle Atlantis 45 Columbia Accident Investigation 45 Space Shuttle Atlantis 45 Atlantis astronauts 45 spacewalkers 45 Curbeam 45 spacewalk 44 space shuttle Endeavour 44 Shuttle Discovery 44 astronauts 44 Nasa 44 shuttle missions 44 shuttle robotic arm 44 Ares IX 43 Soyuz capsule 43 Space Shuttle Endeavour 43 space shuttle Atlantis 43 shuttle astronauts 43 booster rockets 43 Columbia disintegrated 43 rotary joint 43 Parazynski 43 orbiters 43 spacesuits 42 Hubble Space Telescope 42 Saturn rings 42 tiles 42 Phoenix lander 42 Gehman 42 payload bay 41 fuselage 41 aboard Endeavour 41 undock 41 International Space Station 41 Yurchikhin 41 Space Shuttle 41 outer casing 41 Mission Control 41 Space shuttle Discovery 41 Martian soil 41 lunar module 41 landing gear 40 tile 40 Shuttle 40 NASA Mars Reconnaissance 40 undocking 40 Grunsfeld 40 space shuttles 40 Astronauts 40 Kostelnik 40 spacewalking astronauts 40 underside 40 Orbiter 40 Endeavour 40 Space shuttle Atlantis 40 Space Shuttle Columbia 40 Mars Reconnaissance Orbiter 40 robotic arm 40 Hubble 39 solid rocket boosters 39 Spacewalk 39 Flight controllers 39 Tracy Caldwell Dyson 39 Mastracchio 39 Space Agency 39 Suffredini 39 LeRoy Cain 39 hull 39 Meridiani Planum 39 Kennedy Space 38 NASA Hubble Space 38 nicks 38 Apollo astronauts 38 lander 38 lunar surface