Related by context. Frequent words. (Click for all words.) 69 Spacewalking astronauts 69 Astronauts 65 spacewalkers 64 spacewalk 62 spacewalking astronauts 60 Andrew Feustel 59 spacewalks 57 Mission Specialists 57 Discovery astronauts 56 ammonia tank 56 Atlantis astronauts 56 Spacewalk 54 John Grunsfeld 54 shuttle astronauts 54 spacewalking 54 Endeavour astronauts 54 International Space Station 54 Tracy Caldwell Dyson 53 spacewalker 53 spacesuits 52 spacewalking astronaut 52 Danny Olivas 51 robotic arm 51 orbital outpost 51 shuttle Discovery 51 Caldwell Dyson 51 astronauts 51 Curbeam 50 shuttle Atlantis 50 Yurchikhin 50 Stefanyshyn Piper 50 Shuttle Launch 50 orbiting complex 50 Shuttle Discovery 50 Feustel 50 orbiting outpost 50 Fuglesang 50 Nicole Stott 50 Walheim 50 Christer Fuglesang 49 Mastracchio 49 space shuttle Discovery 49 Shuttle Atlantis 49 Behnken 49 spacesuit 49 truss segment 49 Parazynski 49 Fincke 49 Alpha Magnetic Spectrometer 49 commander Peggy Whitson 49 Grunsfeld 49 Kaleri 48 shuttle robotic arm 48 Shuttle Endeavour 48 Padalka 48 Space Station 48 NASA 48 Flight Engineer 48 solar arrays 48 Lopez Alegria 48 Space Shuttle Atlantis 48 space shuttle Atlantis 47 shuttle Endeavour 47 payload bay 47 orbiter 47 Soichi Noguchi 47 NASA Astronaut 47 Malenchenko 47 spacecraft 47 Hubble Space Telescope 47 Daniel Tani 47 Lee Archambault 46 Space Shuttle Endeavour 46 Linnehan 46 orbiting laboratory 46 commander Rick Sturckow 46 space shuttle Endeavour 46 orbiting 46 Mike Fincke 46 Hubble 46 Astronaut 46 ammonia coolant 46 rotary joint 45 airlock 45 orbiting lab 45 astronauts aboard 45 Fossum 44 aboard Endeavour 44 JWST 44 spacemen 44 Dextre 44 heat shield 44 Nasa 44 Mars rover 44 Space shuttle Atlantis 44 Douglas Wheelock 44 Mike Suffredini 44 astronaut 44 Space Shuttle Discovery 44 lunar lander 44 Krikalev