Related by context. Frequent words. (Click for all words.) 50 Soviet cosmonaut Yuri Gagarin 48 Discovery STS 48 Discovery liftoff 47 Shenzhou V 47 Shuttle Discovery 47 truss segment unfurled 46 Peggy Whitson 46 Mikhail Kornienko 46 spaceflight 46 SELENE 45 Hubble servicing 45 orbiting laboratory 45 shuttle Discovery 45 Yuri Gagarin 45 Krikalev 45 Japanese astronaut Koichi 45 unmanned lunar 45 Shuttle Endeavour 45 Apollo missions 44 Soyuz capsule carrying 44 Astronaut Nicole Stott 44 shuttle missions 44 astronaut Peggy Whitson 44 satellite Sputnik 44 Cady Coleman 44 spacewalking 44 Soyuz rocket 44 Mars orbiter 44 Shenzhou VI 44 Julie Payette 44 shuttle Atlantis 43 Commander Peggy Whitson 43 lunar orbiter 43 Koichi Wakata 43 Sheikh Muszaphar 43 manned missions 43 interplanetary spacecraft 43 SpaceX Falcon 9 43 Russian cosmonaut Gennady Padalka 43 commander Peggy Whitson 43 lunar exploration 43 Astronauts aboard 42 Gregory Chamitoff 42 ESA astronaut 42 Shenzhou VII 42 Shuttle astronauts 42 ISS Expedition 42 New Horizons spacecraft 42 spacecraft orbiting 42 Alexander Kaleri 42 particle physics experiment 42 Yang Liwei 42 Skylab 42 International Space Station 42 Mikhail Tyurin 42 orbiting outpost 42 Ares IX rocket 41 Metcalf Lindenburger 41 Space Shuttle Endeavour 41 space shuttle Discovery 41 De Winne 41 shuttle Endeavour 41 particle physics detector 41 Kaguya 41 Baikonur Kazakhstan 41 Bob Thirsk 41 Wakata 41 Russian cosmonaut Yuri Malenchenko 41 infrared telescope 41 rover Opportunity 41 astronaut Yang Liwei 41 manned spacecraft 41 spacewalk 41 Sputnik satellite 41 manned spaceship 41 Space Shuttle Discovery 41 polar orbiting 41 manned spaceflight 41 spaceflights 41 spacewalks 41 Messenger spacecraft 41 Space shuttle Endeavour 41 undocking 41 dockings 41 Lyndin 41 Gagarin flight 41 pressurized compartment 41 space shuttle Endeavour 41 Eyharts 41 Michael Foale 40 Padalka 40 Russian Gennady Padalka 40 Nicole Stott 40 Space Shuttle Atlantis 40 Ariane rocket 40 Dennis Tito 40 Tim Kopra 40 Soyuz capsule 40 Sergei Volkov 40 space shuttle 40 astronauts