Related by context. Frequent words. (Click for all words.) 61 Gene Cernan 60 Frank Borman 60 NASA Astronaut 60 Space Shuttle Endeavor 60 NASA astronaut 60 Astronaut 57 Astronaut Buzz Aldrin 57 Owen Garriott 56 astronaut 55 ISS Expedition 54 Leland Melvin 53 Ron Garan 53 Cady Coleman 52 cosmonaut Yuri Gagarin 51 astronaut Buzz Aldrin 50 Julie Payette 50 Yang Liwei 50 Koichi Wakata 50 June Scobee Rodgers 49 Space Shuttle Launch 49 Yuri Malenchenko 49 ESA astronaut 49 Soviet cosmonaut Yuri Gagarin 49 NASAs 49 Spacelab 48 Haise 48 Blasts Off 48 Eugene Cernan 48 Dan Tani 48 Sergei Volkov 48 Buzz Aldrin 48 Barbree 48 Gus Grissom 48 Randolph Bresnik 48 G. Madhavan Nair 48 NASA 48 Apollo missions 47 NASA astronaut corps 47 Neil deGrasse Tyson 47 orbited Earth 47 astronaut Julie Payette 47 Russian cosmonaut Yuri Malenchenko 47 Edwin Buzz Aldrin 47 Scott Parazynski 47 Christa McAuliffe backup 47 SpaceX Falcon 9 47 De Winne 46 Lunar Exploration 46 Joseph Acaba 46 space shuttle 46 Tim Kopra 46 Space Station 46 Dennis Tito 46 VSS Enterprise 46 Giant Leap 46 Mission Specialists 46 International Space Station 46 interplanetary spacecraft 46 Apollo lunar 46 Piers Sellers 46 Apollo Soyuz 46 Vikram Sarabhai 46 Onizuka 46 JPL manages 45 Mars# 45 Alan Shepard 45 Robert Curbeam 45 Space Shuttle Endeavour 45 Orion Crew 45 Spaceflight 45 Space Shuttle 45 Sheikh Muszaphar Shukor 45 Lee Archambault 45 Cernan 45 Neil Armstrong 45 Lunar Module 45 astronaut Ilan Ramon 45 Richard Linnehan 45 Sally Ride 45 Shuttle astronauts 44 Alexander Kaleri 44 Megan McArthur 44 shuttle Challenger 44 tourist Charles Simonyi 44 Peter Diamandis 44 Apollo 44 Bob Thirsk 44 NEEMO 44 Astrophysicist 44 Space 44 G Madhavan Nair 44 Robonaut 2 44 lunar landing 44 Shuttle Discovery 44 Gorie 44 Professor Stephen Hawking 44 Shuttle Launch 44 spaceship 44 spaceflight 44 Yuri Gagarin 44 astronaut Leroy Chiao