Related by context. Frequent words. (Click for all words.) 61 Soviet cosmonaut Yuri Gagarin 58 shuttle Challenger 55 Gagarin 55 cosmonaut 53 space shuttle 52 Yuri Gagarin 51 Fyodor Yurchikhin 50 Ilan Ramon 50 teacher Christa McAuliffe 50 astronaut 49 Christa McAuliffe 49 cosmonauts 49 Skylab 49 astronauts 49 Soyuz 48 Baikonur Kazakhstan 48 Oleg Kononenko 48 Kalpana Chawla 48 Mikhail Kornienko 48 Roskosmos 48 Malenchenko 47 Soyuz craft 47 Soyuz capsule 47 Yang Liwei 46 Russian cosmonaut 46 NASA astronaut 46 Gregory Chamitoff 46 Roscosmos 46 Challenger exploded 46 spaceship 46 June Scobee Rodgers 46 Schirra 46 Christa McAuliffe backup 46 Caldwell Dyson 45 spacecraft 45 Kononenko 45 Russian cosmonauts 45 Soyuz spacecraft 45 International Space Station 45 shuttle disintegrated 45 Shenzhou V 45 Nicole Stott 45 Russian Soyuz capsule 45 Russian Soyuz spacecraft 45 Ariane rocket 45 Baikonur 45 Dan Tani 45 astronaut Yang Liwei 45 Rick Husband 44 Shuttle astronauts 44 astronaut Peggy Whitson 44 Anatoly Perminov 44 Michael Foale 44 Space Shuttle 44 Bob Thirsk 44 Frank De Winne 44 manned spacecraft 44 cosmodrome 44 Simonyi 44 Space Shuttle Columbia 44 Cosmonaut 44 Space Shuttle Challenger 44 Kazakh steppe 43 Solovyov 43 Edwin Buzz Aldrin 43 Japanese astronaut Soichi 43 Mercury Gemini 43 Cosmonauts 43 Peggy Whitson 43 Japanese astronaut Koichi 43 Tokarev 43 Leroy Chiao 43 Russian Soyuz rocket 43 Greg Chamitoff 43 Soyuz rocket 43 Piers Sellers 42 unmanned spacecraft 42 Space Shuttle Discovery 42 Zamka 42 orbit 42 Mars Pathfinder 42 Baikonur Cosmodrome 42 Charles Simonyi 42 Soyuz TMA 42 orbiting 42 Hubble servicing 42 Space Shuttle Endeavour 42 Paolo Nespoli 42 Yurchikhin 42 shuttle Atlantis 42 orbiter 42 Russian leased Baikonur 42 Dennis Tito 42 Sputnik satellite 42 Sharipov 42 aboard Endeavour 42 spaceflight 41 Daniel Tani 41 Apollo astronauts 41 Padalka 41 astronauts aboard