Related by context. Frequent words. (Click for all words.) 65 insulating foam 62 heat shield 62 foam insulation 58 orbiter 57 thermal tiles 56 liftoff 54 foam 54 Columbia Accident Investigation 53 space shuttle 51 Dittemore 51 orbital debris 50 Gerstenmaier 50 spacecraft 49 thermal blanket 49 shuttle 49 space shuttle Discovery 48 NASA 48 shuttle missions 47 space shuttle Atlantis 47 shuttle Discovery 46 shuttle fleet 46 Space Shuttle Discovery 46 LeRoy Cain 46 fuselage 46 Ares IX 45 nose cone 44 atmospheric gases 44 shuttle Atlantis 44 landing gear 44 astronauts 44 booster rockets 43 astronauts aboard 43 payload bay 43 space shuttle Endeavour 43 Columbia disintegrated 43 engine compartment 43 Discovery astronauts 43 Nasa 43 spacewalkers 42 Gehman 42 Space Shuttle Columbia 42 Space Shuttle Atlantis 42 NASA Administrator 42 shuttle Endeavour 41 Space Shuttle 41 Soyuz capsule 41 orbiters 41 human spaceflight 41 Endeavour 41 gap filler 41 spacewalk 41 thruster 41 Kostelnik 41 Space Shuttle Endeavour 41 Shuttle Discovery 41 rocket booster 40 Cape Canaveral Fla. 40 Atlantis astronauts 40 Shuttle Endeavour 40 debris 40 Sumwalt 40 shuttle astronauts 40 undocking 40 LCROSS 40 solid rocket boosters 40 director Mike Leinbach 40 Perminov 39 impactor 39 Hubble Space Telescope 39 hydrazine 39 Leinbach 39 Cassini 39 space shuttles 39 comet 39 asteroid 39 Endeavour astronauts 39 Astronauts 38 orbiting 38 booster rocket 38 orbit 38 aerodynamic 38 lander 38 rotary joint 38 JAXA 38 Goglia 38 Hubble 38 Kennedy Space 38 Saturn rings 38 International Space Station 38 thrusters 38 undock 38 Soyuz 37 Mission Control 37 Mark Polansky 37 Parazynski 37 spacewalks 37 Sriharikota 37 Rosenker 37 hull 37 Qantas A# 37 Suffredini