Related by context. Frequent words. (Click for all words.) 72 Endeavour astronauts 70 astronauts 68 shuttle astronauts 66 Atlantis astronauts 66 space shuttle Discovery 64 Astronauts 64 shuttle Discovery 63 shuttle Endeavour 63 spacewalkers 63 International Space Station 62 spacewalk 62 shuttle Atlantis 61 space shuttle Endeavour 61 space shuttle Atlantis 59 spacewalks 59 astronauts aboard 58 orbiter 58 Space Shuttle Discovery 58 orbiting outpost 57 spacecraft 56 spacewalking astronauts 56 undocking 55 space shuttle 55 Space shuttle Atlantis 54 Space shuttle Discovery 54 heat shield 54 Endeavour 53 NASA 52 Soyuz capsule 52 crewmates 52 shuttle missions 52 Mission Control 51 robotic arm 51 Atlantis 51 shuttle 51 undock 51 orbit 51 Space Station 51 Padalka 50 Hubble Space Telescope 50 Soyuz 50 Chamitoff 50 Space shuttle Endeavour 50 liftoff 50 Soyuz TMA 50 spacesuits 49 Cape Canaveral Fla. 49 orbiters 49 Russian cosmonauts 49 Fincke 49 Mike Fincke 49 lander 49 Dextre 49 orbiting lab 48 Huygens 48 orbiting 48 Nasa 48 Kennedy Space 48 Parazynski 48 Gerstenmaier 48 space shuttles 48 Flight Engineer 48 astronaut 47 spacewalker 47 CAPE CANAVERAL Fla. 47 Space Agency 46 spacewalking 46 thermal tiles 46 NASA Administrator 46 Russian Soyuz 46 spaceship 46 Russian Soyuz spacecraft 46 Flight controllers 46 NASA astronaut 46 Kibo 46 Cassini 46 Phoenix Mars Lander 45 cosmonauts 45 JAXA 45 Melroy 45 rovers 45 Space Shuttle 45 Chandrayaan 45 Cape Canaveral 45 Baikonur Cosmodrome 45 Mars Reconnaissance Orbiter 44 MESSENGER 44 Hubble 44 ISS 44 solar arrays 44 Soyuz spacecraft 44 Fossum 44 Earth orbit 44 Cape Canaveral Air Force 44 thrusters 44 shuttle fleet 43 spaceflight 43 Orbiter 43 crewmembers 43 Columbia Accident Investigation 43 Astronaut