Related by context. Frequent words. (Click for all words.) 50 International Space Station 47 robot 46 humanoid robot 46 Space Shuttle Discovery 45 shuttle Discovery 45 spacewalking astronauts 45 robotic arm 45 spacecraft 45 orbiting 45 Mission Control 45 Space Shuttle Atlantis 45 Space Station 44 spacewalking 44 spacewalk 44 Roomba 44 spaceship 44 astronauts 44 NASA 43 zero gravity 43 Dextre 43 shuttle Endeavour 43 shuttle Atlantis 43 Endeavour astronauts 43 spacewalker 43 orbiter 43 Nasa 42 orbiting outpost 42 spacesuit 42 space shuttle Endeavour 42 shuttle astronauts 42 Hubble 42 payload bay 42 spacewalkers 42 Shuttle Discovery 42 spacesuits 42 ISS 42 astronaut 42 space shuttle Discovery 41 lander 41 Discovery astronauts 41 robotic 41 X #B 41 orbital outpost 41 Parazynski 41 weightlessness 41 Endeavour 41 spacewalks 41 space shuttle 41 robots 41 Hubble Space Telescope 40 JAXA 40 Hubble telescope 40 Mars rover 40 Soyuz 40 NASA astronaut 40 Fincke 40 rovers 40 spaceflight 39 manned spacecraft 39 Wakata 39 Atlantis astronauts 39 Mars Rover 39 Atlantis 39 Orbiter 39 director Mike Leinbach 39 space shuttle Atlantis 39 Kibo 39 Space Shuttle 39 orbiting laboratory 39 shuttle 39 Mike Fincke 39 orbit 38 Earth orbit 38 Lopez Alegria 38 Astronauts 38 Astronaut 38 Shenzhou 38 airlock 38 Chamitoff 38 cosmonauts 38 weightless 38 Ares 38 Spacewalk 38 microgravity 38 Phoenix Mars Lander 37 Soyuz TMA 37 orbiting lab 37 rover 37 Shuttle 37 SpaceX 37 crewmates 37 Flight Engineer 37 STS 37 Space shuttle Discovery 37 gyroscope 37 Padalka 37 Soyuz capsule 37 rotary joint 36 lunar orbit 36 Jet Propulsion Laboratory 36 suborbital