Related by context. Frequent words. (Click for all words.) 67 Ansari X 64 X Prize 58 SpaceShipOne 58 designer Burt Rutan 57 Burt Rutan 57 sub orbital 55 suborbital flight 54 X PRIZE Foundation 53 SpaceX 53 Dennis Tito 52 suborbital flights 51 Scaled Composites 51 Armadillo Aerospace 50 manned spacecraft 49 spaceflight 49 XCOR 48 Automotive X PRIZE 48 suborbital space 47 spaceflights 47 suborbital 47 Bigelow Aerospace 47 Peter Diamandis 46 Virgin Galactic 46 SpaceDev 45 SPACEHAB 45 lunar rover 44 Space Exploration 44 Elon Musk 43 Space Adventures 43 Orbital Sciences Corporation 43 scramjet 43 Anousheh Ansari 43 Orbital Sciences Corp. 43 spaceships 43 lunar lander 42 Charles Simonyi 42 Crew Exploration 42 manned spaceflight 42 Richard Branson 42 spacecraft 42 DARPA 42 SpaceShipTwo 41 spaceship 41 Ares rocket 41 Orion spacecraft 41 Dragon spacecraft 41 spacecrafts 41 rocketry 41 human spaceflight 41 Aptera 41 Yahsat 41 ARPA E 41 Sir Richard Branson 40 privately funded 40 Spaceport America 40 lunar missions 40 unmanned 40 VLJ 40 Diamandis 40 Orion capsule 40 Templeton Prize 40 AIAA 40 Protonex 40 Boeing Dreamliner 40 Rutan 40 Orbital Sciences 40 SwRI 40 astronautics 39 XOJET 39 X #A 39 entrepreneur Richard Branson 39 Astronautics 39 lunar orbiter 39 Aabar Investments 39 UP Aerospace 39 lunar exploration 39 AeroMobile 39 Planetary Society 39 Pepsi Refresh Project 38 billionaire Richard Branson 38 Sally Ride 38 Astrotech 38 prize 38 Yuri Gagarin 38 #E# Dreamliner 38 Lockheed Martin NYSE LMT 38 grand prize 38 Projects Agency DARPA 38 Alpha Magnetic Spectrometer 38 privately financed 38 Russian Soyuz 38 Richard Garriott 38 spaceport 38 Astrium 38 Craig Venter 38 cryogenic engine 37 Tesla Motors 37 iFund 37 PSLV 37 NASA 37 Dean Kamen