Related by context. Frequent words. (Click for all words.) 71 astronauts 68 Discovery astronauts 66 International Space Station 65 shuttle Discovery 63 shuttle Endeavour 63 space shuttle Discovery 63 shuttle Atlantis 63 Atlantis astronauts 62 spacewalkers 62 spacewalk 60 space shuttle Endeavour 60 spacewalks 59 astronauts aboard 59 orbiting outpost 59 Astronauts 58 spacecraft 58 orbiter 58 shuttle 57 space shuttle Atlantis 56 space shuttle 56 Endeavour 55 Fincke 55 crewmates 55 spacewalking astronauts 55 Space Shuttle Discovery 54 Soyuz TMA 54 Soyuz capsule 53 astronaut 53 orbiting lab 53 shuttle missions 53 Mission Control 52 NASA 52 Hubble Space Telescope 52 orbiters 51 NASA astronaut 51 spacewalking 51 robotic arm 51 Space shuttle Atlantis 51 Atlantis 50 Space Station 50 Soyuz 50 space shuttles 50 spacesuits 50 Parazynski 50 Mike Fincke 50 Space shuttle Discovery 50 ISS 50 Hubble 50 Soyuz spacecraft 50 orbit 49 spacewalker 49 shuttle fleet 49 Space shuttle Endeavour 49 orbiting 48 CAPE CANAVERAL Fla. 48 liftoff 48 Thomas Reiter 48 undocking 48 Nasa 47 heat shield 47 Dextre 47 cosmonauts 47 Space Agency 46 Russian cosmonauts 46 undock 46 Gerstenmaier 46 Russian Soyuz 46 lander 45 spaceflight 45 Flight controllers 45 spaceship 45 Cape Canaveral Fla. 45 solar arrays 45 JAXA 45 rover 44 Kibo 44 Flight Engineer 44 Huygens 44 rovers 43 NASA Administrator 43 Hubble telescope 42 Baikonur Cosmodrome 42 Space Shuttle 42 Astronaut 42 Columbia Accident Investigation 41 cosmonaut 41 Kennedy Space 41 astronaut corps 41 thermal tiles 41 spacesuit 41 lunar surface 41 Fossum 41 Baikonur cosmodrome 41 Chiao 41 Tani 40 Cape Canaveral 40 shuttles 40 Shuttle 40 solid rocket boosters 40 CAPE CANAVERAL 40 human spaceflight