Related by context. Frequent words. (Click for all words.) 54 Shuttle Discovery 53 Nicole Stott 52 astronauts 52 space shuttles 52 Tim Kopra 52 Shuttle astronauts 52 Eyharts 51 NASA astronaut corps 51 shuttle Discovery 51 space shuttle 51 aboard Endeavour 50 shuttle Atlantis 50 Shuttle Endeavour 50 shuttle missions 50 shuttle fleet 50 Soviet cosmonaut Yuri Gagarin 49 space shuttle Discovery 49 Sandra Magnus 49 Koichi Wakata 49 astronaut Daniel Tani 49 Daniel Tani 49 Discovery STS 49 rovers Spirit 49 space shuttle Endeavour 48 Hubble servicing 48 pressurized compartment 48 Japanese astronaut Koichi 48 Gregory Chamitoff 48 Oleg Skripochka 48 orbiting astronauts 48 Space Shuttle Endeavour 48 shuttle disintegrated 48 powerful particle accelerator 48 astronaut Sunita Williams 47 Mars rover Opportunity 47 Greg Chamitoff 47 Christa McAuliffe backup 47 Space shuttle Endeavour 47 Space Shuttle 47 astronaut 47 Mikhail Tyurin 47 astronaut Yang Liwei 47 shuttle Endeavour 47 Stardust spacecraft 46 interplanetary spacecraft 46 astronaut Leopold Eyharts 46 Space Shuttle Discovery 46 Space shuttle Discovery 46 Mission Specialists 46 orbiting laboratory 46 Alexander Kaleri 46 orbiters 46 Messenger spacecraft 46 Space shuttle Atlantis 46 shuttle astronauts 46 manned spaceship 46 Krikalev 45 Shuttle Atlantis 45 astronauts aboard 45 Space Shuttle Atlantis 45 Julie Payette 45 International Space Station 45 Endeavour 45 particle physics detector 45 NASA Kepler 45 Atlantis astronauts 45 Cassini Huygens 45 Dan Tani 45 Endeavour astronauts 45 Bob Thirsk 45 Russian Soyuz capsules 45 orbiting telescope 45 NASA Lunar Reconnaissance 45 NASA astronaut 45 Russian cosmonaut Yuri Malenchenko 45 ISS Expedition 44 Hubble Space Telescope 44 orbital outpost 44 manned spacecraft 44 Astronauts aboard 44 spaceflights 44 John Grunsfeld 44 astronaut Julie Payette 44 Apollo astronauts 44 De Winne 44 Discovery liftoff 44 Flight Engineer 44 Soyuz rocket 44 Commander Eileen 44 Commander Peggy Whitson 44 Mars Pathfinder 44 Astronaut Buzz Aldrin 44 Piers Sellers 44 Israeli astronaut Ilan 44 Lee Archambault 44 lunar missions 44 Mars orbiter 44 Oleg Kononenko 44 orbiting spacecraft 44 Discovery astronauts 43 actress Shannen Doherty