Related by context. Frequent words. (Click for all words.) 73 Yuri Gagarin 64 astronaut Yang Liwei 58 Yang Liwei 58 Dennis Tito 56 Alan Shepard 56 Edwin Buzz Aldrin 53 astronaut 53 space shuttle 52 Russian Soyuz spacecraft 52 lunar landing 52 Gagarin 51 manned spacecraft 51 lunar orbiter 51 shuttle Discovery 51 shuttle Atlantis 51 spaceflights 51 Christa McAuliffe backup 51 NASA astronaut 51 Neil Armstrong 51 Space Shuttle Discovery 51 orbit 51 Russian Soyuz capsule 50 cosmonaut 50 Shenzhou VII 50 Russian Soyuz rocket 50 spaceship 50 shuttle Challenger 50 International Space Station 50 Soyuz capsule 50 spaceflight 50 Soyuz rocket 49 Ilan Ramon 49 Challenger exploded 49 suborbital flight 49 Shenzhou VI 49 Gregory Chamitoff 49 astronaut Sunita Williams 49 Anousheh Ansari 49 sub orbital 49 Daniel Tani 49 Mercury Gemini 49 Astronauts aboard 48 Russian cosmonaut 48 Sherpa Tenzing Norgay 48 Kalpana Chawla 48 orbited 48 founder Guy Laliberte 48 spacecraft 48 lunar orbit 48 manned spaceflight 48 Soyuz spacecraft 48 astronauts 48 orbiting laboratory 47 Cernan 47 Christa McAuliffe 47 Nicole Stott 47 space shuttle Discovery 47 shuttle disintegrated 47 Shenzhou 47 orbiting 47 orbiting complex 47 suborbital flights 47 BAIKONUR Kazakhstan 47 moon 46 Shuttle Discovery 46 lunar probe 46 SpaceShipOne 46 lunar surface 46 Buzz Aldrin 46 Robonaut 2 46 By WENN.com 46 Wakata 46 rover Opportunity 46 Peggy Whitson 46 fiery gases 46 Skylab 46 stories Copyright © 46 Soyuz 46 Orion spacecraft 46 UPI NewsTrack Business 46 Soyuz craft 46 By GMF Editor 45 comet Wild 45 shuttle missions 45 Eileen Collins 45 UPI NewsTrack TopNews 45 nerzog 45 Zamka 45 NASA Administrator 45 Space Shuttle Atlantis 45 By ČTK Published 45 NASA Deep Impact 45 Watercooler Stories 45 Sandra Magnus 45 Russian leased Baikonur 45 robotic spacecraft 44 Baikonur Cosmodrome 44 unmanned spacecraft 44 Space Shuttle Endeavour 44 Space shuttle Discovery 44 c Copyright Thomson Reuters