Related by context. Frequent words. (Click for all words.) 66 Stefanyshyn Piper 63 spacewalk 60 spacewalker 59 Spacewalkers 57 Fuglesang 57 spacewalks 56 Daniel Tani 56 spacewalking 56 spacewalkers 56 John Grunsfeld 55 spacewalking astronauts 54 Atlantis astronauts 53 Behnken 52 Tracy Caldwell Dyson 52 Curbeam 52 International Space Station 52 Parazynski 51 Endeavour astronauts 51 Astronauts 51 Discovery astronauts 50 Mike Fincke 50 Yurchikhin 50 astronauts 50 shuttle Discovery 50 Lopez Alegria 49 astronaut 49 shuttle Atlantis 49 aboard Endeavour 49 Grunsfeld 49 shuttle astronauts 49 space shuttle Discovery 49 Flight Engineer 48 payload bay 48 Shuttle commander 48 orbiting outpost 48 NASA 48 orbital outpost 48 Fincke 47 shuttle Endeavour 47 Feustel 47 space shuttle 47 shuttle robotic arm 47 Space Shuttle Discovery 47 airlock 47 ammonia tank 47 Fossum 47 NASA astronaut 47 Kopra 46 Garrett Reisman 46 Wakata 46 Mastracchio 46 Padalka 46 spacesuits 46 orbiter 46 Suffredini 46 space shuttle Endeavour 46 spaceflight 45 spacemen 45 spacecraft 45 orbiting lab 45 Soichi Noguchi 45 Space Shuttle Endeavour 45 Space Agency 45 cosmonaut 45 Soyuz rocket 45 Space Shuttle Atlantis 44 Bresnik 44 orbiting laboratory 44 Mission Control 44 spacesuit 44 Soyuz capsule 44 Space shuttle Atlantis 44 Garan 44 truss segment 43 JAXA 43 Chamitoff 43 Foale 43 Shuttle Discovery 43 Gerstenmaier 43 Melroy 42 Shuttle Atlantis 42 Astronaut 42 Space Station 42 Sunita Williams 42 Space shuttle Discovery 42 crewmates 42 space shuttle Atlantis 42 Dextre 42 NASA Jet Propulsion Laboratory 42 robotic arm 42 lunar module 42 Alpha Magnetic Spectrometer 42 Alan Poindexter 42 commander Rick Sturckow 41 JWST 41 Shuttle Endeavour 41 Oleg Kotov 41 Russian cosmonaut 41 Perminov 41 Malenchenko 41 Roskosmos