Related by context. Frequent words. (Click for all words.) 61 Canadarm2 60 Discovery payload bay 58 Scott Parazynski 58 shuttle robotic arm 57 Shuttle astronauts 56 robotic arm 55 International Space Station 55 Spacewalkers 54 spacewalkers 53 Piers Sellers 53 Endeavour astronauts 53 Taurus XL rocket 53 orbiting complex 52 Space Shuttle Atlantis 52 Two spacewalking astronauts 52 Robert Behnken 52 Space Shuttle Endeavour 52 Orion capsule 52 Megan McArthur 52 truss segment 52 Dragon capsule 52 Harmony module 52 Discovery astronauts 51 Greg Chamitoff 51 Yurchikhin 51 Oleg Kononenko 51 Dan Tani 51 Mission Specialists 51 Tracy Caldwell Dyson 51 crewmates 51 spacewalk 51 shuttle payload bay 51 Orion spacecraft 50 Spacewalking astronauts 50 Stefanyshyn Piper 50 Soyuz craft 50 astronauts 50 space shuttle Discovery 50 spacecraft 49 spacewalks 49 Heidemarie Stefanyshyn Piper 49 payload bay 49 shuttle Endeavour 49 spaceship 49 spacewalking astronauts 49 Fyodor Yurchikhin 49 Daniel Tani 49 Douglas Wheelock 49 aboard Endeavour 49 space shuttle 49 orbital outpost 48 shuttle astronauts 48 space shuttle Endeavour 48 Robonaut 48 spacewalking 48 spacesuits 48 Nicole Stott 48 Soichi Noguchi 48 Soyuz rocket 48 Lee Archambault 48 shuttle Atlantis 48 Space Shuttle Discovery 48 Automated Transfer Vehicle 48 Atlantis astronauts 48 Malenchenko 47 Japanese astronaut Koichi 47 Peggy Whitson 47 orbiting laboratory 47 robotic submarines 47 space shuttle Atlantis 47 manned spacecraft 47 Russian Soyuz rocket 47 truss 47 orbital module 47 generating solar arrays 47 orbiter 47 orbiting outpost 47 shuttle Discovery 47 CALIPSO 47 Andrew Feustel 47 Canadarm 47 Alpha Magnetic Spectrometer 47 Sandra Magnus 47 orbiting observatory 47 lunar lander 47 solid rocket boosters 46 unmanned spacecraft 46 Soyuz spacecraft 46 Commander Eileen 46 orbiting lab 46 Baikonur Kazakhstan 46 undock 46 Salvage crews 46 Ares rocket 46 Lopez Alegria 46 ammonia tank 46 Astronauts 46 6 #/#-hour spacewalk 46 shuttle 46 Lyndin 46 Astronauts aboard