Related by context. Frequent words. (Click for all words.) 64 X Prize 60 X PRIZE 59 X PRIZE Foundation 56 Centennial Challenges 55 Ansari X 51 Automotive X PRIZE 48 Armadillo Aerospace 47 lunar rover 47 Space Elevator 47 sub orbital 47 DARPA 46 robotic spacecraft 46 lunar exploration 45 suborbital flight 44 SpaceX 44 suborbital flights 44 lunar lander 44 Crew Exploration 44 FIRST LEGO League 43 Lunar Reconnaissance Orbiter 43 Design Contest 43 lunar missions 43 Virgin Galactic 43 Commercial Orbital 43 Global LBS Challenge 43 Burt Rutan 43 spaceships 43 manned spaceflight 43 FIRST Robotics 43 Projects Agency DARPA 43 LCROSS 42 XCOR 42 manned spacecraft 42 Peter Diamandis 42 NASA 42 SpaceShipOne 42 lunar orbiter 42 spaceflight 41 Space Adventures 41 Mars Rover 41 suborbital space 41 geosynchronous orbit 41 suborbital 41 SwRI 40 spacecrafts 40 human spaceflight 40 designer Burt Rutan 40 DARPA Grand 40 lunar landing 40 Space Exploration 40 Dennis Tito 40 SpaceDev 39 Scavenger Hunt 39 Nasa 39 LRO 39 ARPA E 39 Mars rover 39 NASA Ames 39 Pepsi Refresh Project 39 SPACEHAB 39 Tweetup 39 Pepsi Refresh 39 Anousheh Ansari 39 spacecraft 39 Geography Bee 39 FIRST Robotics Competition 39 Planetary Society 39 lunar probe 39 Grand Prize 39 Space Agency 39 Shenzhou VI 39 TechCrunch# 39 Darpa 38 planetary exploration 38 Scaled Composites 38 spaceflights 38 sweepstakes 38 Contest 38 Earth orbit 38 Sally Ride 38 robotics 38 Bigelow Aerospace 38 Lunar Crater Observation 38 SETI @ home 38 ArtPrize 38 grand prize 37 lunar orbit 37 outer space 37 SBIR grant 37 Yandex 37 EELV 37 Kleiner Perkins 37 Challenge 37 spaceship 37 astronaut Yang Liwei 37 Systems Mission Directorate 37 Rutan 37 Soyuz spacecraft 36 Orion capsule 36 Final Vote 36 WorldWide Telescope