Related by context. Frequent words. (Click for all words.) 60 Dennis Tito 55 astronaut 52 Charles Simonyi 50 Sunita Williams 50 NASA astronaut 49 cosmonaut 49 Russian Soyuz spacecraft 49 Sally Ride 49 Soyuz spacecraft 48 BAIKONUR Kazakhstan 48 Space Adventures 47 Daniel Tani 47 cosmonauts 47 Soyuz capsule 47 spaceflight 46 Simonyi 45 sub orbital 45 Yuri Gagarin 45 International Space Station 45 Russian Soyuz capsule 45 Soyuz 45 Russian cosmonaut 45 Russian Soyuz 44 Baikonur Cosmodrome 44 Kalpana Chawla 44 Richard Garriott 44 Russian cosmonauts 44 Roskosmos 44 Oleg Kotov 44 astronauts 43 Mike Fincke 43 Malenchenko 42 Baikonur cosmodrome 42 Padalka 42 manned spacecraft 42 Astronaut 42 Vinogradov 42 Tracy Caldwell Dyson 41 Soyuz TMA 41 Christa McAuliffe 41 Michael Lopez Alegria 41 Garriott 41 ISS 41 Foale 41 Space Agency 41 orbiting laboratory 40 SpaceShipOne 40 Kopra 40 Lopez Alegria 40 spacewalker 40 Virgin Galactic 40 Fincke 40 Chamitoff 39 Baikonur 39 Sharipov 39 shuttle Discovery 39 space shuttle 39 spacecraft 39 Wakata 39 Gagarin 39 Ilan Ramon 38 Space Exploration 38 Space Shuttle Discovery 38 suborbital space 38 entrepreneur Richard Branson 38 weightlessness 38 aboard Endeavour 38 Perminov 38 Kotov 38 Eileen Collins 38 suborbital 37 manned spaceflight 37 orbit 37 Ansari X 37 spaceship 37 Burt Rutan 37 SpaceDev 37 Ansari 37 Yurchikhin 37 Chiao 37 Space Shuttle Endeavour 37 Buzz Aldrin 37 spacewalking 37 orbiting lab 37 astronaut Buzz Aldrin 37 spaceman 36 spacesuit 36 Astronauts 36 orbital outpost 36 Chandrayaan 36 NASA 36 Flight Engineer 36 Anna Chapman 36 space shuttle Discovery 36 space shuttle Endeavour 36 zero gravity 36 Rakesh Sharma 36 designer Burt Rutan 35 SpaceX 35 shuttle astronauts 35 Stefanyshyn Piper