Related by context. Frequent words. (Click for all words.) 54 Mission Control 54 astronaut 53 space shuttle 52 astronauts 52 space shuttle Endeavour 52 spacewalk 52 space shuttle Discovery 52 Discovery astronauts 51 NASA astronaut 51 shuttle Endeavour 51 shuttle Discovery 51 Endeavour astronauts 51 International Space Station 50 NASA 50 Mark Polansky 50 Eileen Collins 50 Flight controllers 49 crewmates 49 Space Shuttle Endeavour 49 NASA Administrator 48 Space Shuttle Discovery 48 aboard Endeavour 48 shuttle astronauts 48 director Mike Leinbach 47 Space shuttle Discovery 47 Cape Canaveral Fla. 47 liftoff 47 shuttle Atlantis 47 orbiter 47 spacewalker 46 spacewalkers 46 Space Shuttle Atlantis 46 Fincke 46 Suffredini 46 Mike Fincke 46 Endeavour 46 Shuttle Endeavour 46 commander 46 Gerstenmaier 46 Shuttle Atlantis 45 shuttle missions 45 Space shuttle Endeavour 45 spacecraft 45 Melroy 45 shuttle robotic arm 45 Flight Engineer 45 Padalka 45 Space shuttle Atlantis 45 spaceflight 45 Nespoli 45 astronauts aboard 45 spacewalks 45 John Grunsfeld 44 Bresnik 44 orbital outpost 44 space shuttle Atlantis 44 Wakata 44 NASA Jet Propulsion Laboratory 44 Soyuz 44 Lopez Alegria 44 Kennedy Space 44 shuttle 44 Parazynski 44 LeRoy Cain 44 Leinbach 44 Rick Husband 43 Astronauts 43 undock 43 Malenchenko 43 blastoff 43 Ares IX 42 Tracy Caldwell Dyson 42 Nasa 42 Astronaut 42 undocking 42 space shuttles 42 Mastracchio 42 Space Agency 42 Dittemore 42 Soyuz capsule 42 Kostelnik 42 Grunsfeld 42 Perminov 42 Shuttle Discovery 42 STS 41 Baikonur cosmodrome 41 orbit 41 wounded Rep. Gabrielle 41 Atlantis astronauts 41 Cape Canaveral Air Force 41 Soyuz TMA 41 By Irene Klotz 41 spacewalking 41 Cape Canaveral 41 Baikonur 41 orbiting outpost 41 human spaceflight 41 orbiting lab 41 Marshburn 40 Baikonur Cosmodrome 40 Behnken