Related by context. Frequent words. (Click for all words.) 71 spacewalk 68 spacewalks 62 spacewalkers 61 spacewalking astronauts 60 spacewalker 59 Lopez Alegria 55 shuttle Discovery 55 International Space Station 54 spacesuits 54 shuttle Atlantis 52 Atlantis astronauts 52 astronauts 52 astronaut 52 Soyuz capsule 51 Endeavour astronauts 51 shuttle astronauts 51 space shuttle Discovery 51 Parazynski 51 orbiting outpost 51 orbiting lab 50 shuttle Endeavour 50 NASA 50 Astronauts 49 Fincke 49 Padalka 49 Mission Control 49 orbiting laboratory 49 spacesuit 48 spaceflight 48 Dextre 48 Shuttle Discovery 48 Mike Fincke 47 ammonia tank 47 Space Shuttle Discovery 47 shuttle missions 47 space shuttle Endeavour 47 cosmonaut 47 orbital outpost 46 Discovery astronauts 46 Spacewalk 46 space shuttle 46 Chamitoff 46 Wakata 45 Soyuz spacecraft 45 Space Station 45 payload bay 45 crewmates 45 orbiter 45 Soyuz 45 Astronaut 44 orbiting 44 Russian cosmonauts 44 cosmonauts 44 Mark Polansky 44 Nasa 44 space shuttle Atlantis 44 Hubble 44 airlock 43 NASA astronaut 43 ISS 43 robotic arm 43 Flight Engineer 43 manned spaceflight 43 Russian cosmonaut 43 undock 43 spacecraft 42 Endeavour 42 shuttle 42 lunar orbit 42 undocking 42 Atlantis 42 Space Agency 42 Hubble Space Telescope 42 Fossum 42 Space Shuttle Atlantis 42 Space shuttle Discovery 42 Suffredini 41 Melroy 41 rotary joint 41 manned spacecraft 41 Gerstenmaier 41 manned missions 41 JAXA 41 thermal blanket 40 orbit 40 orbiters 40 human spaceflight 40 Russian Soyuz spacecraft 40 Space shuttle Endeavour 40 Kibo 40 STS 40 Space shuttle Atlantis 39 solar arrays 39 Chiao 39 Hubble telescope 38 lunar exploration 38 Shenzhou 38 Soyuz TMA 38 liftoff 38 Feustel 38 astronaut corps