Related by context. Frequent words. (Click for all words.) 59 director Mike Leinbach 57 Space Shuttle Atlantis 57 commander Rick Sturckow 54 Alan Poindexter 54 Shuttle commander 53 Eileen Collins 53 orbiter 52 Space Shuttle Endeavour 52 Space Shuttle Discovery 52 shuttle Discovery 51 Mission Control 51 Melroy 51 space shuttle 51 NASA 50 space shuttle Discovery 50 Discovery astronauts 50 Mark Polansky 50 spacecraft 49 NASA Administrator 49 Shuttle Discovery 49 Endeavour astronauts 48 LeRoy Cain 48 International Space Station 48 Space shuttle Discovery 48 Shuttle Endeavour 48 crewmates 48 shuttle 48 astronauts 47 Endeavour 47 Parazynski 47 shuttle Atlantis 47 Stefanyshyn Piper 47 Space shuttle Atlantis 47 Bill Gerstenmaier 47 Ares IX 47 Buzz Aldrin 47 Shuttle Atlantis 47 shuttle missions 46 space shuttle Endeavour 46 Readdy 46 shuttle Endeavour 46 Space Shuttle 46 shuttle robotic arm 46 Yurchikhin 46 astronaut 46 Challenger exploded 45 liftoff 45 Aldrin 45 lunar module 45 payload bay 45 orbit 45 STS 45 NASA Space Shuttle 45 lunar orbit 45 Atlantis astronauts 45 By Irene Klotz 44 Padalka 44 spacewalkers 44 JWST 44 shuttle astronauts 44 Kennedy Space 44 Grunsfeld 44 Michael Lopez Alegria 44 undocking 44 orbiting 44 Wakata 44 spaceflight 44 John Grunsfeld 43 Rick Husband 43 thermal tile 43 Robonaut 43 Astronauts 43 Malenchenko 43 Space Station 43 KENNEDY SPACE CENTER 43 aboard Endeavour 43 Orbiter 43 Space Shuttle Columbia 43 Soichi Noguchi 43 astronauts aboard 43 NASA Jet Propulsion Laboratory 43 Atlantis 43 Shuttle 43 Nasa 43 Cape Canaveral Fla. 43 Cape Canaveral 43 Mike Fincke 42 Jet Propulsion Laboratory 42 JAXA 42 Discovery 42 undocked 42 Mars Reconnaissance Orbiter 42 Orion capsule 42 lander 42 Mars Rover 42 spacewalk 42 Phoenix lander 42 Gerstenmaier 42 Chandrayaan 42 lunar lander 42 Soyuz rocket