Related by context. Frequent words. (Click for all words.) 45 Astronaut 45 astronaut 45 Alan Shepard 45 Grunsfeld 44 NASA astronaut 44 NASA 43 space shuttle 43 astronauts 43 orbit 43 spaceflight 41 Cape Canaveral 41 Space Shuttle Discovery 41 shuttle missions 41 Discovery astronauts 40 Mission Control 40 Aldrin 40 Fincke 40 orbiter 40 Space Shuttle Atlantis 40 Space Shuttle 40 Endeavour astronauts 40 manned spaceflight 40 NASA Administrator 39 Hubble 39 lunar landing 39 blastoff 39 spacecraft 39 Eileen Collins 39 Buzz Aldrin 39 shuttle Discovery 39 Wakata 38 Hubble telescope 38 Kennedy Space 38 space shuttle Discovery 37 Melroy 37 Lisa Nowak 37 Nasa 37 Right Stuff 37 International Space Station 37 Shuttle Discovery 36 Feustel 36 Walter Cronkite 36 Bolden 36 spacewalk 36 Astronauts 36 Atlantis 36 Squyres 36 ISRO 36 shuttle 36 Hayabusa 36 Chandrayaan 36 human spaceflight 36 Atlas V 36 Mike Fincke 36 Whitson 36 Lopez Alegria 36 shuttle Atlantis 35 Yuri Gagarin 35 Gerstenmaier 35 Hubble Space Telescope 35 lunar orbit 35 shuttle Endeavour 35 Atlantis astronauts 35 orbiting 35 liftoff 35 spacewalkers 35 Saturn V 35 Charles Bolden 35 Cronkite 34 shuttle astronauts 34 Padalka 34 Neil Armstrong 34 Space shuttle Discovery 34 spacewalker 34 manned spacecraft 34 Shuttle 34 Soyuz 34 cosmonaut 34 SPACE.com 34 Reisman 34 Polansky 34 Simonyi 34 orbited 34 Gagarin 34 LCROSS 34 Spacecraft 33 crewmates 33 newsman 33 Space shuttle Endeavour 33 NASA Headquarters 33 Gehman 33 space shuttle Atlantis 33 Christa McAuliffe 33 Dittemore 33 undocking 33 astronauts aboard 33 Space Station 33 Chamitoff 33 Fossum 33 Mark Polansky 33 Moyers