Related by context. Frequent words. (Click for all words.) 59 Buzz Aldrin 56 Soviet cosmonaut Yuri Gagarin 54 Neil Armstrong 51 Aldrin 50 Astronaut Buzz Aldrin 50 lunar module 50 Mission Specialists 48 Commander Eileen 47 astronaut Buzz Aldrin 46 astronaut 45 Yuri Gagarin 45 Alan Shepard 45 NASA astronaut 45 ESA astronaut 45 Mercury Gemini 44 Michael Foale 44 Cernan 44 Dennis Tito 43 Eileen Collins 43 Sherpa Tenzing Norgay 43 astronaut Yang Liwei 43 Julie Payette 42 Piers Sellers 42 Doug Wheelock 42 Leland Melvin 41 astronaut Julie Payette 41 Apollo astronauts 41 Fyodor Yurchikhin 41 Robert Satcher 41 Mario R. Capecchi 41 lunar surface 41 Space Shuttle Discovery 40 Gorie 40 lunar landing 40 Lee Archambault 40 Mark Polansky 40 June Scobee Rodgers 39 Charles Lindbergh 39 NASA Astronaut 39 Oleg Skripochka 39 Saturn V 39 John Grunsfeld 39 commander George Zamka 39 Japanese astronaut Soichi 39 Mars Pathfinder 39 NASA astronaut corps 39 Edmund Hillary 39 Melroy 39 NASA Kepler 38 Paolo Nespoli 38 Challenger exploded 38 Harding MLB.com 38 Frank De Winne 38 Mariana Trench 38 Tim Kopra 38 Andrew Feustel 38 Sandra Magnus 38 spaceflights 38 Baikonur Kazakhstan 38 Zamka 38 Peggy Whitson 38 moon 38 Astronauts aboard 38 spacesuit 37 Julius Erving 37 Megan McArthur 37 Shane Kimbrough 37 spaceflight 37 orbit 37 Astronaut 37 Krikalev 37 Russian Soyuz TMA 37 Nicole Stott 37 Rex Walheim 37 Soyuz capsule carrying 37 SpaceX Falcon 9 37 Shenzhou V 37 Space Shuttle Endeavour 37 Koichi Wakata 37 orbiting 37 Russian Soyuz rocket 37 lunar orbit 37 Yang Liwei 37 Joan Higginbotham 37 astronauts 37 NASA Lunar Reconnaissance 37 ZERO G 37 Christer Fuglesang 37 astronauts aboard 37 Metcalf Lindenburger 37 Eric Boe 37 Oleg Kononenko 37 Fincke 36 suborbital flight 36 Shenzhou VII 36 Lopez Alegria 36 Kenneth Ham 36 Scott Parazynski 36 Shuttle astronauts 36 International Space Station 36 Shuttle Discovery