Related by context. Frequent words. (Click for all words.) 55 Mission Specialists 53 Robert Behnken 53 Spacewalkers 52 Fossum 50 spacewalk 50 Heidemarie Stefanyshyn Piper 50 Frank De Winne 50 Nicole Stott 49 spacewalks 49 Harmony module 48 Fincke 48 Christer Fuglesang 48 Rick Mastracchio 48 spacewalkers 48 spacewalking astronauts 48 Behnken 47 Hoshide 47 Greg Chamitoff 47 Shuttle astronauts 47 Spacewalking astronauts 47 astronaut 47 Tracy Caldwell Dyson 47 Padalka 47 Shuttle commander 46 Daniel Tani 46 Flight Engineer 45 Oleg Kotov 45 Lopez Alegria 45 Two spacewalking astronauts 45 Sandra Magnus 45 Suffredini 45 astronauts 45 Soichi Noguchi 44 Feustel 44 Foale 44 NASA astronaut 44 Doug Wheelock 44 Danny Olivas 44 space shuttle Discovery 44 Lyndin 44 Endeavour astronauts 44 Garrett Reisman 44 spacewalking partner 44 Discovery payload bay 44 truss segment 44 Mikhail Kornienko 44 robotic arm 43 shuttle Atlantis 43 Discovery astronauts 43 Caldwell Dyson 43 John Grunsfeld 43 Kaleri 43 Fuglesang 42 Andrew Feustel 42 Space Shuttle Discovery 42 aboard Endeavour 42 shuttle robotic arm 42 Vinogradov 42 Malenchenko 42 cosmonauts 42 spacewalking 42 Linnehan 42 Canadarm2 42 Mastracchio 42 spacewalker 42 Edwin Buzz Aldrin 42 NASA Astronaut 42 shuttle Discovery 42 Astronauts 42 International Space Station 41 spacemen 41 Grunsfeld 41 NASA Administrator 41 lunar orbit 41 Eric Boe 41 Scott Parazynski 41 Stefanyshyn Piper 41 Soyuz capsule 41 Stephen Frick 41 shuttle Endeavour 40 Acaba 40 commander Rick Sturckow 40 astronaut Paolo Nespoli 40 space shuttle Atlantis 40 Yurchikhin 40 Soyuz TMA 40 orbiting laboratory 40 Bob Thirsk 40 orbiter 40 Space Shuttle Atlantis 40 Atlantis astronauts 40 Michael Foale 40 Paolo Nespoli 40 space shuttle Endeavour 40 Parazynski 40 Peggy Whitson 40 orbiting outpost 40 crewmate 40 lunar module 40 Shuttle Endeavour 40 shuttle astronauts