Related by context. Frequent words. (Click for all words.) 54 spacewalk 54 Mastracchio 52 spacewalker 50 astronauts 50 spacewalkers 48 Fincke 48 Endeavour astronauts 48 Astronauts 48 Discovery astronauts 47 astronaut 47 spacewalking astronauts 47 NASA 47 Parazynski 46 Stefanyshyn Piper 46 orbiter 46 spacewalks 46 shuttle robotic arm 46 spacesuit 45 thermal tile 45 Atlantis astronauts 45 Tracy Caldwell Dyson 45 Curbeam 45 Lopez Alegria 45 shuttle Discovery 45 shuttle astronauts 45 space shuttle 44 heat shield 44 gap fillers 44 space shuttle Discovery 44 thermal blanket 44 Yurchikhin 44 International Space Station 44 spacesuits 44 space shuttle Atlantis 43 Astronaut 43 shuttle Atlantis 43 Mission Control 43 Space Shuttle Endeavour 43 shuttle Endeavour 43 Fossum 43 Vinogradov 42 space shuttle Endeavour 42 Space Shuttle Atlantis 42 shuttle missions 42 Malenchenko 42 Grunsfeld 42 Nasa 42 NASA astronaut 42 spacewalking 42 shuttle 42 Gerstenmaier 42 Space Agency 42 Flight controllers 41 spacecraft 41 Flight Engineer 41 Feustel 41 Padalka 41 orbital debris 41 Tyurin 41 Space Shuttle Discovery 41 robotic arm 40 orbiting 40 Wakata 40 Behnken 40 Dittemore 40 insulating foam 40 Chamitoff 40 rotary joint 40 Fuglesang 40 aboard Endeavour 40 crewmates 39 orbiting outpost 39 orbital outpost 39 Engineers 39 foam insulation 39 Nespoli 39 gap filler 38 Tani 38 Massimino 38 lunar module 38 JAXA 38 thermal tiles 38 ammonia tank 38 ISS 38 Suffredini 38 Whitson 38 lander 38 Foale 38 Shuttle Atlantis 38 liftoff 37 repairmen 37 Space Shuttle 37 Endeavour 37 cosmonaut 37 Hubble Space Telescope 37 Olivas 37 cosmonauts 37 Rick Husband 37 Kostelnik 37 Kotov 37 Hubble telescope