Related by context. Frequent words. (Click for all words.) 49 space shuttle Discovery 47 Mikhail Kornienko 46 NASA astronaut 45 space shuttle Endeavour 45 Tracy Caldwell Dyson 45 Acaba 44 Nicole Stott 44 shuttle Endeavour 44 Oleg Kononenko 44 Space Shuttle Discovery 44 shuttle Atlantis 44 Shuttle astronauts 43 Piers Sellers 43 shuttle Discovery 42 Shuttle Endeavour 42 Astronaut 42 Cape Canaveral 42 Eyharts 42 Space Shuttle Endeavour 42 Shane Kimbrough 42 Sandra Magnus 42 space shuttle 41 space shuttle Atlantis 41 Dan Tani 41 Endeavour astronauts 41 rover Opportunity 40 Cape Canaveral Fla. 40 By Irene Klotz 40 Marcia Dunn 40 Robert Satcher 40 International Space Station 40 Christa McAuliffe backup 40 Shuttle Atlantis 40 NASA 40 Greg Chamitoff 40 Fyodor Yurchikhin 40 Sturckow 40 Shuttle Discovery 39 NASA Astronaut 39 Andrew Feustel 39 astronaut 39 Mission Specialists 39 astronauts 39 Astronauts aboard 39 Spacewalkers 39 Japanese astronaut Soichi 39 Space Shuttle Atlantis 39 Kennedy Space 38 shuttle missions 38 Commander Eileen 38 commander Peggy Whitson 38 Lee Archambault 38 Padalka 38 tourist Charles Simonyi 38 Michael Foale 38 Bob Thirsk 38 Danny Olivas 38 Flight Engineer 38 Japanese astronaut Koichi 38 Caldwell Dyson 38 Julie Payette 38 Spacewalking astronauts 38 Robert Behnken 38 Hoshide 38 milked cows 37 Space shuttle Discovery 37 Endeavour 37 Shuttle Launch 37 John Grunsfeld 37 ESA astronaut 37 Astronauts 37 Daniel Tani 37 Space shuttle Atlantis 37 NASA spaceport 37 Yurchikhin 37 Russian cosmonaut 37 Titusville Fla. 37 Metcalf Lindenburger 37 Two spacewalking astronauts 37 Heidemarie Stefanyshyn Piper 37 NASA Space Shuttle 37 Rick Mastracchio 37 spacemen 37 New Horizons spacecraft 36 BAIKONUR Kazakhstan 36 Space Shuttle 36 Mars Pathfinder 36 Peggy Whitson 36 Malenchenko 36 Eric Boe 36 astronaut Daniel Tani 36 spacewalking astronauts 36 Behnken 36 Orion spacecraft 36 teacher Christa McAuliffe 36 Fincke 36 Ilan Ramon 36 STS 36 orbiting laboratory 36 Grunsfeld 36 Doug Wheelock