Related by context. Frequent words. (Click for all words.) 65 Spacewalkers 61 spacewalking astronauts 60 ammonia tank 57 spacewalk 57 spacewalkers 56 shuttle Atlantis 56 Discovery astronauts 56 Astronauts 55 space shuttle Discovery 54 space shuttle Atlantis 54 Space shuttle Discovery 54 orbiting outpost 54 International Space Station 54 Tracy Caldwell Dyson 54 Endeavour astronauts 54 shuttle Discovery 53 Atlantis astronauts 53 orbital outpost 52 ammonia coolant 52 shuttle Endeavour 52 Dextre 51 spacewalks 51 Shuttle Discovery 51 spacewalking 51 truss segment 50 shuttle astronauts 50 space shuttle Endeavour 50 Alpha Magnetic Spectrometer 50 Space shuttle Endeavour 50 Fuglesang 50 Space Shuttle Atlantis 50 John Grunsfeld 50 orbiting laboratory 49 aboard Endeavour 49 Yurchikhin 49 astronauts aboard 49 commander Peggy Whitson 49 Nicole Stott 48 Daniel Tani 48 spacesuits 48 Shuttle Atlantis 48 CAPE CANAVERAL Fla. 48 Oleg Kotov 48 astronauts 48 Space Shuttle Endeavour 47 airlock 47 robotic arm 47 Space shuttle Atlantis 47 Soyuz rocket 47 Michael Lopez Alegria 46 Shuttle Endeavour 46 Hubble Space Telescope 46 undock 46 Russian cosmonaut 46 Sunita Williams 46 payload bay 45 shuttle robotic arm 45 Space Agency 45 Mission Specialists 45 Padalka 45 rotary joint 45 solar arrays 45 Garrett Reisman 45 Soichi Noguchi 45 Stefanyshyn Piper 45 SPACE CENTER Houston 45 CAPE CANAVERAL 45 Lopez Alegria 44 orbiting lab 44 Mike Fincke 44 Soyuz capsule 44 Fincke 44 docking port 43 Krikalev 43 orbiting 43 BAIKONUR Kazakhstan 43 Flight Engineer 43 Wakata 43 spacecraft 43 Curbeam 43 undocked 43 Russian cosmonauts 43 astronaut Sunita Williams 43 Sharipov 42 Danny Olivas 42 Parazynski 42 Russian Soyuz capsule 42 Chamitoff 42 spacemen 42 Endeavour belly 42 Grunsfeld 42 Baikonur cosmodrome 42 Soyuz spacecraft 42 gap fillers 42 Space Shuttle Discovery 42 Tyurin 42 Space Station 42 rewiring 42 spacesuit 41 Phoenix lander 41 spacewalker