Related by context. Frequent words. (Click for all words.) 67 shuttle Challenger 60 Space Shuttle Challenger 60 space shuttle 56 shuttle disintegrated 56 Soviet cosmonaut Yuri Gagarin 55 Space Shuttle Columbia 55 Challenger exploded 54 spacecraft 54 satellite Sputnik 54 Sputnik satellite 54 Ariane rocket 54 Baikonur Kazakhstan 53 Christa McAuliffe backup 52 SpaceX Falcon 9 52 Shuttle Endeavour 52 teacher Christa McAuliffe 51 Space Shuttle Discovery 51 Mars orbiter 51 Shuttle Discovery 51 interplanetary spacecraft 51 meteoroid 51 astronauts 50 Taurus XL rocket 50 shuttle fleet 50 Mars Pathfinder 50 CALIPSO 50 astronauts aboard 50 fiery gases 50 spaceship 50 Space Shuttle Endeavour 50 manned spacecraft 50 Orion spacecraft 50 Baikonur Cosmodrome 50 Soyuz rocket 50 NASA Space Shuttle 49 Space Shuttle 49 Messenger spacecraft 49 space shuttle Discovery 49 Discovery liftoff 49 Ares IX rocket 49 shuttle 49 shuttle Discovery 49 Mars Lander 49 Space Shuttle Atlantis 49 spaceplane 49 Ilan Ramon 49 orbiting telescope 49 orbiter 49 Columbia disintegrated 49 space shuttles 49 NASA 49 lunar orbiter 49 New Horizons spacecraft 48 orbiting observatory 48 Soyuz capsule carrying 48 Soyuz capsule 48 Shuttle astronauts 48 unmanned spacecraft 48 PSLV C# 48 pad #A 47 space shuttle Endeavour 47 robotic spacecraft 47 Mars Polar Lander 47 Hubble Space Telescope 47 liftoff 47 Stardust spacecraft 47 Israeli astronaut Ilan 47 June Scobee Rodgers 47 Orbiting Carbon Observatory 47 shuttle Endeavour 47 human spaceflight 47 Discovery STS 47 NASA astronaut 47 LCROSS 47 Voyager spacecraft 47 X ray telescope 47 astronaut 47 Christa McAuliffe 47 Cape Canaveral Fla. 47 Shuttle Atlantis 47 Russian Soyuz rocket 46 Bulava missile 46 Apollo astronauts 46 LCROSS mission 46 Gagarin flight 46 Shuttle Launch 46 CAPE CANAVERAL FL 46 spacecrafts 46 Caldwell Dyson 46 Cape Canaveral 46 Tim Kopra 46 coronal mass ejection 46 By Irene Klotz 46 administrator Sean O'Keefe 46 shuttle missions 46 NASA Lunar Reconnaissance 46 shuttle Atlantis 46 Polar Lander 45 X #A 45 Soyuz craft 45 NASA astronaut corps