Related by context. Frequent words. (Click for all words.) 53 Piers Sellers 52 Mission Specialists 49 Fossum 47 Spacewalkers 46 Alexander Kaleri 46 Casey Fossum 46 Tim Kopra 45 Rick Mastracchio 45 Oleg Skripochka 45 Japanese astronaut Koichi 45 Heidemarie Stefanyshyn Piper 45 aboard Endeavour 45 By Jennifer LeClaire 44 Shuttle astronauts 44 Daniel Tani 44 Nicole Stott 44 spacewalk 44 Soichi Noguchi 44 Andrew Feustel 44 spacewalks 44 Koichi Wakata 43 Frank De Winne 43 Robert Behnken 43 Doug Wheelock 43 Randy Choate 43 Shuttle commander 42 starter Wandy Rodriguez 42 Richard Linnehan 42 Joe Roa 42 Danny Olivas 42 Spacewalking astronauts 42 NASA astronaut 42 Gregory Chamitoff 41 Jon Switzer 41 Lance Cormier 41 astronaut 41 Oleg Kononenko 41 Japanese astronaut Soichi 41 Miguel Asencio 41 astronaut Peggy Whitson 41 Oleg Kotov 41 unmanned lunar 41 International Space Station 41 reliever Matt Guerrier 41 NEEMO 41 Discovery STS 41 Shuttle Launch 40 Soyuz capsule carrying 40 shuttle Endeavour 40 Jim Hoey 40 Crew Exploration 40 shuttle thermal tiles 40 Joan Higginbotham 40 Wes Obermueller 40 Flight Engineer 40 Discovery payload bay 40 Hubble servicing 40 NASA spaceport 40 Aquilino Lopez 39 Sean Henn 39 space shuttle Endeavour 39 Sandra Magnus 39 Shuttle Atlantis 39 Roy Corcoran 39 Mike Koplove 39 spacewalking astronauts 39 Foale 39 Suffredini 39 Shane Kimbrough 39 Ernesto Frieri 39 Dustin Nippert 39 Dan Tani 39 Fyodor Yurchikhin 39 Behnken 39 Rick Helling 39 6 #/#-hour spacewalk 39 Discovery astronauts 38 Jeremi Gonzalez 38 Astronauts 38 Tracy Caldwell Dyson 38 Greg Chamitoff 38 LHP Erik Bedard 38 Eddie Bonine 38 Hector Carrasco 38 Eyharts 38 starter Boof Bonser 38 Gregg Zaun 38 Aaron Sele 38 Ares IX 38 Josh Rupe 38 Scott Parazynski 38 Lopez Alegria 38 Mastracchio 38 Rex Walheim 38 spacewalking partner 38 Lee Archambault 38 Brian Duensing 38 starter Casey Fossum 38 manned missions 37 space shuttle Discovery 37 Franklyn German