Related by context. Frequent words. (Click for all words.) 60 Tracy Caldwell Dyson 57 Padalka 55 spacewalkers 55 astronauts 54 shuttle Atlantis 54 shuttle Discovery 54 Malenchenko 53 Kopra 53 spacewalk 52 Flight Engineer 52 Space Shuttle Endeavour 52 Grunsfeld 52 space shuttle Discovery 52 Mission Control 52 Lopez Alegria 52 International Space Station 51 Space Shuttle Atlantis 51 Discovery astronauts 51 spacecraft 51 Space Shuttle Discovery 51 shuttle Endeavour 51 shuttle astronauts 50 orbiter 50 Parazynski 50 space shuttle 50 Sharipov 50 astronaut 50 ammonia tank 50 Mike Fincke 50 spacewalker 50 spacewalking astronauts 50 Fincke 49 Wakata 49 Flight controllers 49 spacewalks 49 undocking 49 Astronauts 49 John Grunsfeld 49 space shuttle Endeavour 49 Chamitoff 49 Oleg Kotov 49 Soyuz TMA 49 Tokarev 49 Soyuz 48 Soyuz capsule 48 Space Station 48 spacesuits 48 Russian cosmonauts 48 astronauts aboard 48 Michael Lopez Alegria 48 Endeavour astronauts 48 Kotov 47 aboard Endeavour 47 orbiting laboratory 47 spacewalking 47 NASA 47 NASA astronaut 47 Shuttle Discovery 47 JAXA 47 Mastracchio 47 Gerstenmaier 47 spacesuit 46 Melroy 46 Feustel 46 undock 46 Atlantis astronauts 46 orbital outpost 46 airlock 46 cosmonauts 45 shuttle missions 45 Shuttle Endeavour 45 Suffredini 45 Baikonur Cosmodrome 45 Baikonur cosmodrome 45 Mark Polansky 45 liftoff 45 cosmonaut 45 space shuttle Atlantis 45 payload bay 45 orbit 45 Shuttle Atlantis 45 STS 44 Nasa 44 lunar module 44 orbiting 44 Fossum 44 orbiting outpost 44 Sunita Williams 44 Chiao 43 Space shuttle Discovery 43 Hubble Space Telescope 43 Spacewalk 43 Cape Canaveral Fla. 43 robotic arm 43 Behnken 43 Christa McAuliffe 43 Perminov 43 Soyuz spacecraft 42 Vinogradov 42 orbiting lab 42 shuttle