Related by context. Frequent words. (Click for all words.) 67 Wernher von Braun 58 cosmonaut Yuri Gagarin 57 von Braun 55 Gus Grissom 53 Owen Garriott 51 Vikram Sarabhai 51 Julie Payette 50 Frank Borman 50 Tim Kopra 50 astronaut Hans Schlegel 50 Faget 50 Soviet cosmonaut Yuri Gagarin 50 Jimmy Doolittle 49 Judith Resnik 49 astronaut 49 physicist 49 Sputnik satellite 49 Tuskegee Airman 49 Saturn V 49 astronaut Ilan Ramon 49 aviator Charles Lindbergh 48 Mercury Gemini 48 Astrophysicist 48 Kalpana Chawla 48 Hans Schlegel 48 interplanetary spacecraft 48 Ariane rocket 48 Apollo missions 47 NASA astronaut corps 47 June Scobee Rodgers 47 satellite Sputnik 47 Sergei Volkov 47 Jet Propulsion Lab 47 Mars Pathfinder 47 teacher Christa McAuliffe 47 Piers Sellers 47 spacecraft 47 Ron Garan 47 Von Braun 47 manned spacecraft 46 Koichi Wakata 46 Sandra Magnus 46 spaceship 46 astronaut Peggy Whitson 46 Cernan 46 Soyuz capsule carrying 46 Edward Teller 46 NASA astronaut 46 Mikhail Tyurin 46 Timothy Kopra 46 NASA Stardust spacecraft 46 Alexander Kaleri 46 Ilan Ramon 45 James Doohan 45 astronaut Leopold Eyharts 45 rocketry 45 Paul Dirac 45 Dave Arneson 45 orbited Earth 45 Nicolaus Copernicus 45 Astronaut Buzz Aldrin 45 Metcalf Lindenburger 45 roboticist 45 Greg Chamitoff 45 administrator Sean O'Keefe 45 Nicole Stott 45 agency Roskosmos 45 Roberto Vittori 45 Eyharts 45 Jack Kilby 45 Onizuka 45 Niels Bohr 44 ISS Expedition 44 Ares rocket 44 Haise 44 astronauts 44 astrophysicist 44 ESA astronaut 44 ion propulsion 44 Richard Feynman 44 theoretical physicist 44 NASAs 44 Johns Hopkins Applied Physics 44 Bahcall 44 shuttle orbiter 44 Eugene Cernan 44 unmanned spacecraft 44 aeronautical engineer 44 Physicist 44 nanosatellite 44 NASA 44 Astronaut Nicole Stott 44 Michael Foale 44 Roger Chaffee 44 Mars Lander 44 Apollo astronauts 44 Zhai Zhigang 44 Japanese astronaut Takao 44 Russian cosmonaut Yuri Malenchenko 44 Peter Diamandis 43 Peter H. Diamandis