Related by context. Frequent words. (Click for all words.) 58 shuttle Atlantis 57 Shuttle Discovery 57 shuttle Discovery 55 Space Shuttle Atlantis 55 Shuttle astronauts 55 Shuttle Atlantis 55 Space Shuttle Endeavour 54 space shuttle 54 space shuttle Atlantis 54 Shuttle Endeavour 54 space shuttle Endeavour 53 space shuttle Discovery 53 shuttle 52 shuttle payload bay 51 shuttle Endeavour 51 spacecraft 51 orbiting complex 51 shuttle missions 51 orbiter 51 International Space Station 50 orbiting outpost 50 Zamka 50 Harmony module 50 Space Shuttle Discovery 50 Discovery payload bay 49 Hubble servicing 49 astronauts 49 space shuttles 49 NASA 49 Dragon capsule 49 Soyuz rocket 49 EVAs 49 Space Shuttle 49 Space shuttle Discovery 48 New Horizons spacecraft 48 External Tank 48 Endeavour 48 shuttle fleet 48 payload bay 48 Taurus XL rocket 48 orbital outpost 48 orbit 48 Space shuttle Endeavour 47 Two spacewalking astronauts 47 Shenzhou VII 47 Heidemarie Stefanyshyn Piper 47 astronauts aboard 47 Baikonur Kazakhstan 47 Space Station 47 orbiting observatory 47 solid rocket boosters 47 orbiting laboratory 46 Endeavour astronauts 46 Spacewalkers 46 Space shuttle Atlantis 46 Discovery astronauts 46 Spacewalking astronauts 46 Christa McAuliffe backup 46 Astronauts 46 Sandra Magnus 46 Cape Canaveral Fla. 46 SSME 46 Stardust spacecraft 46 Space Shuttle Program 46 aboard Endeavour 46 astronaut 46 orbiters 46 Launch Pad #A 45 spacewalk 45 rocket booster 45 Shenzhou V 45 Hubble Space Telescope 45 GOCE 45 Atlantis astronauts 45 Commander Eileen 45 Kibo lab 45 Gregory Chamitoff 45 Japan Kibo lab 45 Nicole Stott 45 shuttle astronauts 45 spacecrafts 45 blastoff 45 STS 45 Russian Soyuz spacecraft 45 Orion spacecraft 44 lander 44 Soviet cosmonaut Yuri Gagarin 44 teacher Christa McAuliffe 44 Alpha Magnetic Spectrometer 44 Soyuz capsule 44 spacewalkers 44 NASA Astronaut 44 lunar orbit 44 shuttles 44 Orion capsule 44 named Kibo 44 orbital module 44 NASA astronaut 43 spacewalks 43 NASA Space Shuttle 43 Shuttle