Related by context. Frequent words. (Click for all words.) 68 heat shield 61 orbiter 58 insulating foam 57 foam insulation 56 thermal blanket 53 foam 50 space shuttle 50 liftoff 49 Gerstenmaier 49 spacecraft 48 nose cone 47 shuttle 47 Columbia disintegrated 46 Discovery astronauts 46 fuselage 46 Dittemore 46 shuttle Discovery 46 space shuttle Discovery 46 Columbia Accident Investigation 45 spacewalk 45 spacesuits 44 orbiters 44 shuttle Atlantis 43 tiles 43 shuttle missions 43 astronauts 43 Space Shuttle Discovery 43 space shuttle Atlantis 42 solid rocket boosters 42 Soyuz capsule 42 space shuttles 41 undocking 41 spacewalkers 41 shuttle astronauts 41 lunar surface 41 spacewalking astronauts 41 Cape Canaveral Fla. 40 shuttle fleet 40 NASA 40 landing gear 40 shuttle Endeavour 40 Atlantis astronauts 40 LCROSS 39 booster rocket 39 hull 39 engine compartment 39 vinyl siding 39 space shuttle Endeavour 39 lander 39 orbit 39 sidewall 39 Parazynski 39 sealant 39 Orbiter 38 Space Shuttle 38 STS 38 tile 38 spacewalks 38 front fender 38 Cassini 38 welds 38 insulation 37 ceramic tiles 37 spacewalking 37 Kennedy Space 37 Mars Reconnaissance Orbiter 37 bulkhead 37 Gehman 37 Soyuz 37 Endeavour 37 astronauts aboard 37 director Mike Leinbach 37 Discovery 37 Huygens 37 Martian surface 37 corrosion 36 containment vessel 36 rocket booster 36 Hubble Space Telescope 36 Soyuz spacecraft 36 caulk 36 Earth orbit 36 slats 36 flaking 36 rear tire 36 thermal insulation 36 Nasa 36 windshield 36 spacesuit 36 Mission Control 36 rivets 36 outer shell 36 Foam 36 debris 36 charring 36 fender 36 orbiting 35 Soyuz TMA 35 Space Agency 35 undercarriage 35 liquid hydrogen