Related by context. Frequent words. (Click for all words.) 74 astronaut 69 NASA astronaut 59 Astronauts 57 astronauts 57 NASA 53 Nasa 53 Space Shuttle Endeavour 52 space shuttle 52 Space Station 52 International Space Station 52 Space Shuttle Discovery 50 shuttle Discovery 50 Shuttle Discovery 50 spacesuit 50 Space Shuttle 50 Lopez Alegria 49 cosmonaut 49 shuttle Endeavour 49 Spacecraft 49 Shuttle Endeavour 49 space shuttle Discovery 48 Flight Engineer 48 Space 48 orbiter 48 shuttle Atlantis 48 Fincke 47 spacewalker 47 Mission Control 47 astronauts aboard 47 space shuttle Endeavour 47 Space Agency 47 Kennedy Space 46 spacecraft 46 shuttle 45 Space Shuttle Atlantis 45 Spacewalk 45 spacewalking 45 Atlantis 45 Mars Rover 45 Noguchi 45 spacewalk 44 Endeavour 44 lunar landing 44 spaceship 44 cosmonauts 44 spacewalkers 44 STS 43 spaceflight 43 crewmates 43 Shuttle 43 Eileen Collins 43 Soyuz 43 aboard Endeavour 43 Discovery astronauts 43 space shuttles 43 Hubble 43 Alan Shepard 43 Tracy Caldwell Dyson 42 shuttle missions 42 zero gravity 42 Polansky 42 Sunita Williams 42 Mars rover 42 shuttle astronauts 42 orbiting 42 Wakata 42 Endeavour astronauts 42 Soyuz TMA 42 Russian cosmonaut 42 Rick Husband 41 Mark Polansky 41 space shuttle Atlantis 41 spacesuits 41 outer space 41 Soyuz capsule 41 Cape Canaveral 41 ISS 41 Chamitoff 41 orbiters 41 Space shuttle Endeavour 41 spacewalks 41 Space shuttle Discovery 41 Mars 41 Cape Canaveral Fla. 41 Whitson 41 Garriott 41 Nowak 41 Michael Lopez Alegria 41 Gagarin 41 Malenchenko 41 Lisa Nowak 40 Atlantis astronauts 40 Kopra 40 manned spacecraft 40 Space Exploration 40 Kotov 40 Skylab 40 Mastracchio 40 Richard Garriott 40 orbiting laboratory 40 Tani