Related by context. Frequent words. (Click for all words.) 60 Stefanyshyn Piper 52 spacewalk 47 spacewalking astronauts 47 spacewalkers 45 spacewalks 45 spacewalking 45 Spacewalkers 44 spacewalker 43 Grunsfeld 42 Atlantis astronauts 42 Space Shuttle Endeavour 42 spacesuits 41 LCROSS 41 Space Shuttle Atlantis 41 Parazynski 41 robotic arm 41 Discovery astronauts 41 Space Shuttle Discovery 41 Fuglesang 41 Curbeam 40 space shuttle Discovery 40 shuttle robotic arm 40 Endeavour astronauts 39 Spacewalk 39 Lopez Alegria 39 Soichi Noguchi 39 shuttle Endeavour 38 Tracy Caldwell Dyson 38 Endeavour belly 38 lunar orbit 38 Astronauts 38 lunar module 37 heat shield 37 space shuttle Atlantis 37 shuttle Discovery 37 space shuttle Endeavour 37 thermal tile 37 Fincke 37 Yurchikhin 37 aboard Endeavour 36 shuttle Atlantis 36 Soyuz rocket 36 thermal blanket 36 Space shuttle Atlantis 36 Gerstenmaier 36 shuttle missions 36 Mastracchio 36 Behnken 36 Padalka 36 Flight Engineer 36 orbiter 35 NASA 35 Malenchenko 35 Daniel Tani 35 Danny Olivas 35 International Space Station 35 Garan 35 Feustel 35 truss segment 35 MESSENGER 35 Readdy 34 Soyuz capsule 34 undocking 34 orbiting outpost 34 screwdriver 34 lander 34 orbit 34 Shuttle Discovery 34 spacecraft 34 liftoff 34 astronauts 34 Wakata 34 spacesuit 34 payload bay 34 Spirit rover 34 unmanned spacecraft 34 rotary joint 34 undock 34 thruster 33 Mars rover 33 Fossum 33 toolbox 33 spectrometer 33 microgravity 33 tank foam insulation 33 commander Rick Sturckow 33 insulating foam 33 Shuttle Atlantis 33 space shuttle 33 shuttle astronauts 33 Foale 32 Cassini 32 pry bar 32 Chiao 32 lunar orbiter 32 Huygens 32 EVA 32 commander Peggy Whitson 32 Mission Control 32 lunar lander 32 Sensing Satellite