Related by context. Frequent words. (Click for all words.) 59 NASA 54 space shuttle 53 Nasa 52 Roskosmos 51 Anatoly Perminov 50 NASA Administrator 49 Kennedy Space 48 Hubble servicing 48 Commander Eileen 48 Space Shuttle Endeavour 48 Roscosmos 47 spokesman Allard Beutel 47 Perminov 47 Bill Gerstenmaier 47 Sean O'Keefe 47 Readdy 47 director Mike Leinbach 46 Cape Canaveral 46 Bill Gerstenmaier NASA 46 shuttle 46 Shuttle Discovery 45 Shuttle Endeavour 45 Space Shuttle Discovery 45 liftoff 45 LeRoy Cain 45 human spaceflight 45 Karamargin 45 NASA astronaut 44 Space Shuttle Atlantis 44 Space Shuttle 44 Shuttle Launch 44 space shuttle Discovery 44 astronauts 44 Space Shuttle Program 43 Mike Suffredini 43 shuttle Challenger 43 shuttle Discovery 43 Shuttle commander 43 orbiter 43 Launch Pad #A 43 JAXA 43 Wallops Island 43 NASA Headquarters 43 Jean Jacques Dordain 43 Discovery astronauts 43 Christa McAuliffe backup 42 Mission Control 42 Space Agency 42 Shuttle Landing 42 International Space Station 42 Cape Canaveral Fla. 42 PASADENA Calif. NASA 42 Astronauts aboard 42 space shuttle Endeavour 42 commander Rick Sturckow 42 Sturckow 42 space shuttle Atlantis 42 shuttle Atlantis 42 ISRO 41 Lyndin 41 manned missions 41 spacecraft 41 Orbiting Carbon Observatory 41 Shuttle astronauts 41 Marion Blakey 41 manager Ron Dittemore 41 Shuttle Atlantis 41 Isro 41 Cernan 41 Lautenbacher 41 unmanned spacecraft 41 Sriharikota 41 KSC 41 KENNEDY SPACE CENTER 40 astronaut 40 commander Peggy Whitson 40 shuttle missions 40 orbiting observatory 40 June Scobee Rodgers 40 undock 40 orbiters 40 spaceflight 40 Space shuttle Atlantis 40 shuttle Endeavour 40 Wallops 40 National Aeronautics 40 Endeavour 40 Soyuz rocket 40 Systems Mission Directorate 40 Endeavour astronauts 39 Shenzhou VII 39 blastoff 39 Ares IX 39 Charles Bolden 39 Cape Canaveral Air Force 39 spaceport 39 Cosmosphere 39 Space Shuttle Columbia 39 spaceflights 39 By Irene Klotz 39 shuttle fleet