Related by context. Frequent words. (Click for all words.) 67 Soviet cosmonaut Yuri Gagarin 63 Yuri Gagarin 60 Anousheh Ansari 56 astronaut Yang Liwei 56 cosmonaut 55 Yang Liwei 55 astronaut 54 Soyuz rocket 53 Baikonur Kazakhstan 53 Roskosmos 53 manned spacecraft 53 Dennis Tito 52 Gagarin 52 Shenzhou V 51 cosmonauts 51 NASA astronaut 51 commander Peggy Whitson 51 Shenzhou VII 50 Baikonur Cosmodrome 50 Soyuz capsule 50 BAIKONUR Kazakhstan 50 International Space Station 50 spaceflight 50 Peggy Whitson 50 Cosmonaut 50 Malenchenko 49 Russian cosmonaut 49 Kalpana Chawla 49 orbit 49 Soyuz 49 Charles Simonyi 49 Baikonur 49 Shenzhou VI 48 Russian Soyuz spacecraft 48 sub orbital 48 cosmodrome 48 Soyuz spacecraft 48 astronauts 48 Mikhail Kornienko 48 Soyuz craft 48 space shuttle 48 Russian Soyuz rocket 48 Kazakh steppe 47 spaceship 47 spacecraft 47 Sputnik 47 Space Shuttle Discovery 47 Russian leased Baikonur 47 Nicole Stott 47 Eileen Collins 47 Baikonur space 47 Russian Soyuz capsule 46 Korolyov 46 Svetlana 46 manned spaceflight 46 Japanese astronaut Koichi 46 Oleg Kononenko 46 Shenzhou 46 outer space 46 Michael Foale 46 Piers Sellers 46 Gregory Chamitoff 46 Russian 46 taikonauts 46 lunar orbiter 45 unmanned lunar 45 Soyuz TMA 45 orbiting laboratory 45 Bolshevik revolution 45 Kononenko 45 spacemen 45 Skylab 45 astronaut Sunita Williams 45 Sally Ride 45 manned missions 45 orbiting 45 Daniel Tani 45 shuttle Discovery 45 Edwin Buzz Aldrin 45 Russian cosmonauts 45 space 45 Baikonur cosmodrome 45 Vinogradov 45 spacewalking 45 spacesuit 44 Soviet Union 44 suborbital flight 44 Kotov 44 shuttle Atlantis 44 Bob Thirsk 44 Anastasiya 44 Astronauts aboard 44 Soviet 44 William Oefelein 44 Roscosmos 44 Christa McAuliffe backup 44 orbiting complex 44 Paolo Nespoli 44 Foale 44 Padalka 44 Astronaut