Related by context. Frequent words. (Click for all words.) 59 astronaut 58 NASA 58 Nasa 55 NASA astronaut 54 Julie Payette 54 space shuttle 54 astronauts 53 NASAs 52 orbited Earth 52 Space Agency 52 astronaut Peggy Whitson 52 interplanetary spacecraft 52 Soyuz capsule carrying 52 lunar landings 52 cosmonaut 51 Soviet cosmonaut Yuri Gagarin 51 Ariane rocket 51 spaceflight 51 Astronaut 51 Alexander Kaleri 51 Mars# 51 Tim Kopra 50 spacemen 50 manned spaceflight 50 Owen Garriott 50 human spaceflight 50 Astronauts aboard 50 manned spacecraft 50 Apollo missions 50 NASA astronaut corps 49 NASA Astronaut 49 spaceship 49 manned spaceship 49 spaceplane 49 agency Roskosmos 49 International Space Station 49 RSC Energia 49 Kalpana Chawla 49 JOHNSON SPACE CENTER 49 Piers Sellers 48 manned missions 48 spacecraft 48 astronaut Julie Payette 48 administrator Sean O'Keefe 48 Cady Coleman 48 spacesuit 48 Gagarin 48 Ron Garan 48 outer space 48 lunar orbiter 48 astronaut Hans Schlegel 48 Yuri Gagarin 48 Sputnik satellite 48 satellite Sputnik 48 reusable spacecraft 47 Anousheh Ansari 47 astronaut Leroy Chiao 47 Cassini Huygens 47 Russian cosmonaut Yuri Malenchenko 47 National Aeronautics 47 cosmonauts 47 Hubble servicing 47 Wernher von Braun 47 Professor Stephen Hawking 47 Sergei Volkov 47 Cosmonauts 47 Shuttle Discovery 47 Skylab 46 orbiting 46 Space Shuttle 46 Metcalf Lindenburger 46 Yang Liwei 46 Vikram Sarabhai 46 Robert Curbeam 46 commander Dominic Gorie 46 planetary exploration 46 Leroy Chiao 46 orbit 46 Soyuz rocket 46 Shuttle astronauts 46 spacecraft orbiting 46 Budarin 46 Roskosmos 46 spaceman 46 Soyuz rockets 46 Human Spaceflight 46 Shenzhou VII 45 astronaut Roberto Vittori 45 Shenzhou V 45 lunar landing 45 Mercury Gemini 45 Valery Tokarev 45 Fyodor Yurchikhin 45 Michael Foale 45 agency Roscosmos 45 teacher Christa McAuliffe 45 astronaut Yang Liwei 45 Russian cosmonaut Gennady Padalka 45 Space Shuttle Endeavour 45 Leland Melvin 45 Koichi Wakata