Related by context. Frequent words. (Click for all words.) 72 Robert Behnken 69 Piers Sellers 65 Joan Higginbotham 64 Mission Specialists 64 Spacewalkers 63 Richard Linnehan 62 Shane Kimbrough 61 Christer Fuglesang 60 Shuttle astronauts 60 Tim Kopra 59 Alexander Kaleri 59 Heidemarie Stefanyshyn Piper 59 NASA Astronaut 58 Koichi Wakata 57 Greg Chamitoff 57 Behnken 57 Nicole Stott 57 astronaut 57 spacewalker 56 Frank De Winne 56 Oleg Skripochka 56 Andrew Feustel 56 Flight Engineer 56 Julie Payette 56 ESA astronaut 56 NASA astronaut 56 Astronaut 55 spacewalkers 55 commander George Zamka 55 Dan Tani 55 Soichi Noguchi 55 Lee Archambault 55 spacewalk 55 Oleg Kononenko 54 Rick Mastracchio 54 Doug Wheelock 54 Paolo Nespoli 53 Virts 53 Tony Antonelli 53 Astronauts 53 Linnehan 53 Spacewalking astronauts 53 Rex Walheim 53 Mikhail Kornienko 53 spacewalking partner 53 Discovery STS 53 Fyodor Yurchikhin 52 Danny Olivas 52 Sandra Magnus 52 Scott Parazynski 52 Kononenko 52 astronauts 52 Fuglesang 52 NEEMO 52 Foale 52 Leland Melvin 51 John Grunsfeld 51 Robert Satcher 51 By Irene Klotz 51 Tracy Caldwell Dyson 50 spacewalks 50 Japanese astronaut Soichi 50 spacewalking 50 Acaba 50 Nasa 50 International Space Station 50 Daniel Tani 50 Megan McArthur 50 Gorie 50 Stefanyshyn Piper 50 NASA 50 Spacewalk 50 6 #/#-hour spacewalk 50 Kaleri 49 NASA astronaut corps 49 Atlantis astronauts 49 spacesuit 49 Fincke 49 astronaut Paolo Nespoli 49 Eyharts 49 Garrett Reisman 49 aboard Endeavour 49 ISS 49 Eric Boe 49 Discovery astronauts 49 Endeavour astronauts 49 Navias 49 Gregory Chamitoff 49 astronaut Peggy Whitson 49 Caldwell Dyson 48 shuttle Endeavour 48 spacewalking astronauts 48 Sturckow 48 astronaut Roberto Vittori 48 Hoshide 48 Bob Thirsk 48 Fossum 48 interplanetary spacecraft 48 Yurchikhin 48 shuttle Atlantis 48 Canadarm2