Related by context. Frequent words. (Click for all words.) 51 Readdy 47 NASA 42 Nasa 42 NASA astronaut 41 Lautenbacher 41 Karamargin 41 Lyndin 40 Commander Eileen 40 orbiter 40 space shuttle 40 astronaut 40 astronauts 40 NASA Astronaut 39 NASA Administrator 39 Shuttle commander 39 shuttle 39 downlinked 39 human spaceflight 39 spacecraft 38 shuttle Discovery 38 Shuttle astronauts 37 space shuttles 37 Cernan 37 Zamka 37 Space Shuttle Atlantis 37 LeRoy Cain chairman 36 space shuttle Endeavour 36 Kennedy Space 36 manned spaceflight 36 liftoff 36 Space Agency 36 shuttle missions 36 PASADENA Calif. NASA 36 Sturckow 36 lunar missions 36 A'Hearn 36 CAIB 36 orbiters 36 Discovery astronauts 36 manned missions 35 Leroy Chiao 35 spokesman Allard Beutel 35 orbit 35 Space Shuttle 35 Space Shuttle Discovery 35 Perminov 35 orbiting 35 Gehman 35 manned spacecraft 35 Rick Husband 35 Space Shuttle Endeavour 35 Tony Antonelli 35 space shuttle Discovery 35 Cape Canaveral 35 commander Rick Sturckow 35 International Space Station 35 Roskosmos 35 lunar orbiter 35 lunar exploration 35 Space Shuttle Columbia 34 manager Ron Dittemore 34 JAXA 34 robotic spacecraft 34 respond 34 NASA Kepler 34 Charles Bolden 34 Gorie 34 mission 34 Space shuttle Atlantis 34 Mike Suffredini 34 Space Shuttle Program 34 Cape Canaveral Air Force 34 Mission Control 34 Shuttle Discovery 34 spaceflight 34 shuttle disintegrated 34 Gerstenmaier 34 Hubble servicing 34 Shuttle Landing 34 Dittemore 34 Camarda 34 Astronaut 34 astronauts aboard 34 shuttle Challenger 33 Endeavour astronauts 33 Colaprete 33 Space.com 33 director Holly Ridings 33 missions 33 Bill Gerstenmaier 33 Anatoly Perminov 33 Apollo astronauts 33 shuttle Endeavour 33 G Madhavan Nair 33 Shuttle Atlantis 33 Sean O'Keefe 33 LeRoy Cain 33 Nicole Stott 33 Endeavour 33 Peter Diamandis 33 Bill Gerstenmaier NASA