Related by context. Frequent words. (Click for all words.) 53 astronaut 49 NASA astronaut 48 space shuttle 47 astronauts 46 NASA 45 shuttle fleet 44 Russian Soyuz spacecraft 44 spaceflight 44 cosmonaut 44 aboard Endeavour 44 International Space Station 43 Lisa Nowak 43 Malenchenko 42 Eileen Collins 42 shuttle Discovery 42 shuttle missions 41 orbiting laboratory 41 shuttle astronauts 41 orbiting lab 41 shuttle Endeavour 41 Space Shuttle 40 cosmonauts 40 human spaceflight 39 astronaut Lisa Nowak 39 Thomas Reiter 39 Christa McAuliffe 39 orbiters 39 crewmates 39 Astronaut 38 spacewalking 38 Nasa 38 Columbia Accident Investigation 38 shuttle 38 Soyuz capsule 38 Mike Fincke 38 shuttle Atlantis 38 Space Station 38 Space Shuttle Endeavour 38 Russian Soyuz capsule 38 payload bay 37 orbit 37 space shuttle Endeavour 37 Soyuz 37 Columbia disintegrated 37 Lopez Alegria 37 Wakata 37 Mark Polansky 37 space shuttle Discovery 37 spacecraft 37 Mission Control 37 ISS 37 Baikonur 37 space shuttles 37 Earth orbit 37 orbiting outpost 36 spacewalk 36 Soyuz spacecraft 36 astronauts aboard 36 orbital outpost 36 Space 36 Gerstenmaier 36 Yuri Gagarin 36 Rick Husband 36 spacewalkers 35 Space Shuttle Discovery 35 manned spaceflight 35 Astronauts 35 Endeavour 35 orbiting 35 Simonyi 35 liftoff 35 manned spacecraft 34 spacewalker 34 Hubble 34 Apollo astronauts 34 Hubble Space Telescope 34 Shuttle Discovery 34 Suffredini 34 orbiter 34 Cape Canaveral Air Force 34 Chandrayaan 34 Space Shuttle Columbia 34 Polansky 34 Padalka 33 Space shuttle Endeavour 33 manned missions 33 Air Force colonel 33 Perminov 33 SpaceX 33 Sally Ride 33 Cape Canaveral Fla. 33 Fincke 33 Space Shuttle Atlantis 33 spacewalks 33 Russian cosmonaut 33 space shuttle Atlantis 33 Space shuttle Discovery 33 NASA Administrator 33 microgravity 33 Flight Engineer 33 Discovery astronauts