Related by context. Frequent words. (Click for all words.) 79 astronaut 69 Astronaut 60 Space Shuttle Endeavour 60 astronauts 59 space shuttle 59 International Space Station 58 NASA 56 shuttle Discovery 55 Space Shuttle Discovery 54 space shuttle Endeavour 53 Space Shuttle Atlantis 52 Flight Engineer 52 shuttle Endeavour 52 Lopez Alegria 52 shuttle 52 space shuttle Discovery 52 Eileen Collins 52 spacewalker 52 cosmonaut 51 shuttle astronauts 51 spaceflight 51 Astronauts 51 Malenchenko 51 Space Agency 51 Tracy Caldwell Dyson 51 Nasa 51 Shuttle Endeavour 50 Fincke 50 Endeavour 50 Sunita Williams 49 astronaut corps 49 shuttle Atlantis 49 Russian cosmonaut 49 astronaut Buzz Aldrin 49 space shuttle Atlantis 49 Soyuz spacecraft 49 aboard Endeavour 48 Russian Soyuz spacecraft 48 Wakata 48 Shuttle Discovery 48 Space shuttle Discovery 48 orbiter 48 Endeavour astronauts 48 spacecraft 48 orbiting laboratory 48 Soyuz capsule 47 Space shuttle Endeavour 47 spacesuit 47 Space Station 47 Soyuz TMA 47 Buzz Aldrin 47 Soyuz 47 manned spacecraft 47 spaceship 47 Padalka 46 cosmonauts 46 Alan Shepard 46 Space Shuttle 46 astronauts aboard 46 astronaut Lisa Nowak 46 Discovery astronauts 46 orbit 46 Chamitoff 45 Space shuttle Atlantis 45 Sally Ride 45 Richard Garriott 45 orbiters 45 Russian cosmonauts 45 Mastracchio 45 Russian Soyuz capsule 45 Nespoli 44 spacewalks 44 space shuttles 44 Polansky 44 shuttle missions 44 Baikonur Cosmodrome 44 Cape Canaveral 44 Russian Soyuz 44 Mission Control 44 Michael Lopez Alegria 44 crewmates 44 Simonyi 44 orbiting lab 44 Grunsfeld 43 NASA Administrator 43 Chiao 43 spacewalking 43 Garriott 43 Skylab 43 Mark Polansky 43 Kotov 43 Rick Husband 43 Kennedy Space 43 Mike Fincke 43 Cape Canaveral Fla. 43 ISS 43 spacewalk 43 human spaceflight 43 zero gravity 43 lunar module 43 Melroy