Related by context. Frequent words. (Click for all words.) 54 Borschberg 48 Solar Impulse 48 ESA astronaut 47 Shenzhou VI 46 Cassini Huygens 46 Yang Liwei 46 spacecrafts 45 Eyharts 45 COROT 45 weightlessness 44 Krikalev 44 commander George Zamka 44 GOCE 44 Peter Diamandis 44 Bob Thirsk 44 suborbital flight 44 spacecraft 43 Lyndin 43 spaceship 43 spaceflights 43 Piers Sellers 43 Schweickart 42 Roskosmos 42 sub orbital 42 Shenzhou V 42 astronaut 42 Madhavan Nair 42 parabolas 42 cosmonaut 42 Shenzhou VII 42 orbit 42 Leroy Chiao 41 Gorie 41 Wakata 41 suborbital flights 41 Nie Haisheng 41 Simonyi 41 NASA astronaut 41 Isro 41 Nasa 41 unpowered 41 G Madhavan Nair 41 EVAs 40 zero gravity 40 lunar orbit 40 nominal 40 astronaut Julie Payette 40 CloudSat 40 ZERO G 40 Soviet cosmonaut Yuri Gagarin 40 CALIPSO 40 Hoshide 40 Russian cosmonauts 40 Soyuz 39 circular orbit 39 Kaleri 39 Nicole Stott 39 International Space Station 39 cosmic radiation 39 Virgin Galactic 39 Alan Poindexter 39 Mars Pathfinder 39 Charles Simonyi 39 Japanese astronaut Soichi 39 Kenneth Ham 39 manned spacecraft 39 tourist Charles Simonyi 39 Space Agency 39 orbital module 39 moon 39 JAXA 39 Frank De Winne 39 Tony Antonelli 39 Earth orbit 39 LRO 39 Soyuz rocket 39 orbital 39 airship 38 orbiting spacecraft 38 spaceflight 38 Virgin Atlantic GlobalFlyer 38 SpaceX Falcon 9 38 astronautics 38 ISRO 38 Kopra 38 Dan Tani 38 aircrafts 38 John Grunsfeld 38 SuitSat 38 RAK Airways 38 Foale 38 Greg Chamitoff 38 astronaut Yang Liwei 38 Soyuz spacecraft 38 Hayabusa 38 lunar surface 38 Stardust spacecraft 38 GlobalFlyer 38 Space.com 38 Dragon capsule 38 Richard Feynman