Related by context. Frequent words. (Click for all words.) 52 Discovery liftoff 50 liftoff 50 orbiter 49 insulation foam 49 thruster 49 space shuttle Discovery 48 space shuttle Atlantis 48 shuttle Discovery 47 insulating foam 47 spacecraft 47 cryogenic engine 47 liquid hydrogen 47 space shuttle Endeavour 46 space shuttle 46 Discovery astronauts 46 Shuttle astronauts 46 Ariane rocket 46 heat shield 45 spacewalk 45 Spacewalking astronauts 45 rocket booster 45 spacesuits 45 Space Shuttle Discovery 45 New Horizons spacecraft 44 Flight Readiness 44 shuttle Atlantis 44 Taurus XL rocket 44 shuttle Endeavour 44 orbiting telescope 44 orbital module 44 tank foam insulation 44 Orbiting Carbon Observatory 44 Orion spacecraft 44 orbiting complex 44 foam 44 foam insulation 44 rocket boosters 43 spacewalking astronaut 43 NASA 43 thrusters 43 Space Shuttle Endeavour 43 Lyndin 43 Endeavour belly 43 ammonia coolant 43 Space shuttle Discovery 43 gaseous hydrogen 43 Musudan ri 43 Stardust spacecraft 43 shuttle 43 Phoenix Mars lander 42 Baikonur Kazakhstan 42 blastoff 42 orbiting observatory 42 Shuttle Discovery 42 spokesman Allard Beutel 42 orbiters 42 Space Shuttle Atlantis 42 nose cone 42 lander 42 Orion capsule 42 orbit 42 Hubble servicing 42 ice frost ramps 42 Nasa 42 Mars orbiter 42 Ares rocket 42 Ares IX 42 Mars lander 42 intercontinental missile 41 Soyuz spacecraft 41 Soyuz 41 Soyuz rocket 41 rocket 41 lunar orbiter 41 spacewalkers 41 Spacewalkers 41 booster rocket 41 Shuttle Endeavour 41 booster rockets 41 Soyuz capsule 41 Shuttle Atlantis 41 6 #/#-hour spacewalk 41 Shenzhou VII 41 solid rocket boosters 41 Discovery payload bay 40 Bill Gerstenmaier NASA 40 Russian Soyuz rocket 40 International Space Station 40 thermal blanket 40 undocking 40 GlobalFlyer 40 malfunctioned 40 shuttle payload bay 40 SpaceX Falcon 9 40 scramjet 40 Gerstenmaier 40 ammonia tank 40 Dragon spacecraft 40 propellant 40 Phoenix lander 40 Space Shuttle Program