Related by context. Frequent words. (Click for all words.) 72 astronauts 59 shuttle astronauts 59 Discovery astronauts 57 space shuttle 56 shuttle Discovery 56 spacewalkers 55 Astronauts 55 shuttle Atlantis 55 space shuttle Discovery 54 spacecraft 54 International Space Station 54 shuttle missions 54 Endeavour astronauts 53 space shuttle Endeavour 53 spacewalk 53 orbiter 53 crewmates 53 spacewalks 53 astronaut 53 space shuttle Atlantis 52 shuttle Endeavour 51 shuttle fleet 50 Mission Control 50 Columbia disintegrated 50 Soyuz capsule 50 Shuttle Discovery 50 Soyuz TMA 50 NASA 49 Space Shuttle Atlantis 49 Atlantis astronauts 49 orbiting 48 space shuttles 48 liftoff 48 Nasa 48 Space Shuttle Columbia 48 shuttle 47 spacewalking astronauts 47 orbiting outpost 47 orbiters 47 orbiting laboratory 47 Astronaut 46 orbital outpost 46 NASA astronaut 46 Space Shuttle Discovery 46 Parazynski 46 orbit 45 Russian cosmonauts 45 Soyuz spacecraft 45 Padalka 45 heat shield 45 Fincke 45 CAPE CANAVERAL Fla. 45 Space shuttle Endeavour 45 Hubble Space Telescope 44 Endeavour 44 Soyuz 44 Apollo astronauts 44 Space Station 44 spacesuits 44 Space shuttle Discovery 43 cosmonauts 43 undocking 43 spaceflight 43 NASA Administrator 43 spaceship 43 Space Agency 42 Russian cosmonaut 42 blastoff 42 Kennedy Space 42 Space shuttle Atlantis 42 Lopez Alegria 42 payload bay 42 undock 42 Flight controllers 41 Cape Canaveral Fla. 41 crewmembers 41 spacesuit 41 National Aeronautics 41 ammonia tank 41 Atlantis 41 Columbia Accident Investigation 40 Flight Engineer 40 solar arrays 40 spacewalker 40 CAPE CANAVERAL 40 orbiting lab 40 ISS 40 manned spacecraft 40 robotic arm 40 Mike Fincke 40 cosmonaut 39 Russian Soyuz 39 Russian Soyuz spacecraft 39 Cape Canaveral Air Force 39 lander 39 Mark Polansky 39 foam insulation 39 Sharipov 39 lunar orbit 38 Space Shuttle 38 Hubble