Related by context. Frequent words. (Click for all words.) 49 spacewalkers 47 astronaut 46 spacewalk 44 Stefanyshyn Piper 44 NASA astronaut 44 Tracy Caldwell Dyson 44 Astronaut 43 spacewalking 42 NASA 42 astronauts 42 Olivas 42 Daniel Tani 42 Yurchikhin 42 Fuglesang 41 Astronauts 41 truss segment 40 truss 40 Space Shuttle Discovery 40 cosmonaut 40 spacewalks 40 space shuttle Discovery 40 Soichi Noguchi 40 International Space Station 40 Mastracchio 40 Behnken 40 aboard Endeavour 39 Vandenberg Air Force Base 39 Lopez Alegria 39 Russian cosmonaut 39 Space Shuttle Endeavour 39 Garan 39 Wakata 38 ammonia tank 38 spacewalker 38 Fincke 38 Malenchenko 38 Grunsfeld 38 shuttle Atlantis 38 Kotov 38 space shuttle 38 Curbeam 37 shuttle Discovery 37 astronauts aboard 37 Ares IX 37 Nasa 37 orbiter 37 spacesuit 37 shuttle Endeavour 37 Padalka 37 Space Shuttle Atlantis 37 Nespoli 37 Mike Fincke 37 Space Station 37 Space Agency 37 solid rocket boosters 37 John Grunsfeld 37 Flight Engineer 37 Chamitoff 36 space shuttle Atlantis 36 Chiao 36 Vinogradov 36 Parazynski 36 orbital outpost 36 Suffredini 36 Mark Polansky 36 orbiting outpost 36 NASA Ames 36 Atlantis astronauts 35 thermal tile 35 spacewalking astronauts 35 microgravity 35 Dennis Tito 35 orbiting laboratory 35 Dextre 35 Gerstenmaier 35 Challenger exploded 35 ISS 35 Discovery astronauts 35 Endeavour astronauts 35 spacecraft 35 Sharipov 35 Mission Control 35 Cape Canaveral Air Force 35 crewmates 35 spaceflight 35 Space.com 35 zero gravity 35 shuttle astronauts 35 Shuttle Discovery 34 shuttle 34 payload bay 34 SPACE.com 34 Soyuz TMA 34 robotics 34 lunar module 34 shuttle robotic arm 34 Noguchi 34 NASA Administrator 34 NASA Space Shuttle 34 Atlantis 34 Baikonur Cosmodrome