Related by context. Frequent words. (Click for all words.) 67 spacewalk 62 spacewalks 58 spacewalkers 57 Endeavour astronauts 56 Discovery astronauts 53 truss segment 53 spacewalking astronauts 52 astronauts 51 Atlantis astronauts 51 International Space Station 50 shuttle missions 50 Tracy Caldwell Dyson 50 spacewalking 49 Padalka 49 Yurchikhin 48 Stefanyshyn Piper 48 solar arrays 48 Soichi Noguchi 48 shuttle astronauts 48 shuttle Atlantis 48 Mastracchio 48 undocking 48 aboard Endeavour 48 orbiting laboratory 48 Fuglesang 48 shuttle Endeavour 47 shuttle Discovery 47 orbiting outpost 47 spacewalker 47 orbiter 46 shuttle robotic arm 46 Space Shuttle Atlantis 46 space shuttle Discovery 46 Parazynski 46 ammonia tank 46 rotary joint 46 Wakata 46 undock 46 payload bay 46 space shuttle Atlantis 45 Lopez Alegria 45 Astronauts 45 Soyuz capsule 45 space shuttle Endeavour 45 orbital outpost 45 orbiting lab 45 Space Shuttle Discovery 45 Spacewalk 44 Space Shuttle Endeavour 44 Fincke 44 Vinogradov 44 Flight Engineer 44 spacecraft 44 Shuttle Discovery 44 liftoff 44 astronauts aboard 43 airlock 43 Nespoli 43 Curbeam 43 girder 43 truss 43 lunar module 43 Tokarev 42 Grunsfeld 42 Malenchenko 42 spacesuits 42 Mission Control 42 Mike Fincke 42 lunar orbit 42 Behnken 42 orbiting 42 space shuttle 42 Suffredini 42 robotic arm 41 Space shuttle Discovery 41 NASA 41 metal shavings 41 Endeavour 40 Space Agency 40 thermal tile 40 crewmates 40 Chamitoff 40 John Grunsfeld 40 spacemen 40 astronaut 40 shuttle 40 Garan 40 Bresnik 40 Gerstenmaier 40 spacesuit 40 Flight controllers 40 spaceflight 40 manned missions 40 Shuttle Endeavour 40 Space shuttle Atlantis 39 Feustel 39 lander 39 Kibo 39 Russian Soyuz capsule 39 Space Station 39 Cape Canaveral Fla.