Related by context. Frequent words. (Click for all words.) 70 X Prize 63 SpaceShipOne 58 Burt Rutan 56 sub orbital 52 designer Burt Rutan 52 suborbital 51 Scaled Composites 51 Rutan 51 suborbital space 50 manned spacecraft 50 Virgin Galactic 48 X PRIZE Foundation 48 SpaceX 45 Dennis Tito 45 privately financed 44 Diamandis 44 SpaceShipTwo 43 SpaceDev 43 manned spaceflight 43 spaceflight 40 spacecraft 40 billionaire Richard Branson 40 spaceships 40 privately funded 40 spacecrafts 39 LCROSS 39 Space Adventures 39 DARPA 39 spaceship 39 lunar lander 39 Musk 39 Russian Soyuz rocket 39 Solar Impulse 38 Crew Exploration 38 Melvill 38 Space Exploration 38 lunar missions 38 X #A 37 rocketry 37 manned missions 37 Perminov 37 hypersonic 37 entrepreneur Richard Branson 37 CEO Elon Musk 37 Orbital Sciences Corp. 37 supersonic 36 Yuri Gagarin 36 Russian Soyuz spacecraft 36 Planetary Society 36 Richard Branson 36 Sally Ride 36 Sir Richard Branson 36 spaceport 36 Human Genome Project 36 unmanned 36 Spaceship 36 startups 36 Earth orbit 36 unmanned spacecraft 35 SPACEHAB 35 SwRI 35 GlobalFlyer 35 GSLV 35 VLJ 35 space shuttle 35 J. Craig Venter 35 Nasa 35 ARPA E 35 Craig Venter 35 lunar exploration 35 Elon Musk 35 Lunar Reconnaissance Orbiter 35 human spaceflight 35 Piccard 34 NASA 34 Russian Soyuz 34 Orbital Sciences 34 Tesla Motors 34 Soyuz spacecraft 34 founder Jeff Bezos 34 Spaceport America 34 Branson 34 OpenStack 34 astronautics 34 unmanned aerial 34 Soyuz rocket 34 Cloudera 34 weightlessness 34 X #B 34 Darpa 34 lunar landing 34 Simonyi 34 aeronautics 33 Shuttle Atlantis 33 Garriott 33 Astronautics 33 Sergey Brin 33 Astrium 33 Charles Simonyi 33 Ball Aerospace 33 Orbital Sciences Corporation