Related by context. Frequent words. (Click for all words.) 78 Centennial Challenges 57 X PRIZE 54 Lunar X PRIZE 52 Evolved Expendable Launch Vehicle 52 X PRIZE Foundation 50 MathMovesU 50 SBIR STTR 50 X Prize 50 Commercial Orbital 50 DARPA 49 EPSCoR 48 EcoCAR 48 NASAs 48 TV Lifetimes 48 AFRL 48 Lunar Lander 48 SpaceX Falcon 9 48 Mission Directorate 48 NASA 47 manned spaceflight 47 SBIR 47 Masten Space Systems 47 Human Spaceflight 47 NASA Headquarters 47 Stardust NExT 47 Huggable Heroes 46 Mathcounts 46 STTR 46 Raytheon IDS 46 Systems Mission Directorate 46 lunar exploration 46 lunar lander 46 spaceflight 46 reusable spacecraft 46 NASTAR Center 45 NASA Goddard 45 Automotive X PRIZE 45 Dryden Flight Research 45 SwRI 45 INCITE 45 CubeSat 45 Orion Crew 45 NASA Space Shuttle 45 MarCom Awards 45 CyberPatriot 45 NASA Astronaut 44 Crew Exploration 44 JPL manages 44 Mercury Gemini 44 based Midcourse Defense 44 Robotic Systems 44 Burt Rutan 44 Aerojet 44 RSC Energia 44 LCROSS mission 44 Ansari X 44 manned spacecraft 44 Discovery STS 44 Mike Melvill 44 MathCounts 44 Armadillo Aerospace 43 NASA Ames 43 GOES R 43 SBIR grant 43 GLEQ 43 EELV 43 National Aeronautic 43 NASA JPL 43 Webb Telescope 43 Space Agency 43 agency Roscosmos 43 planetary missions 43 LaserMotive 43 Orion spacecraft 43 Advanced Concepts 43 ZERO G 43 Bigelow Aerospace 43 Technology Transfer STTR 43 Launch Vehicle 43 Airborne Laser 43 Achievement Scholarship 43 JAXA 43 MAVEN 43 SpaceX 42 sub orbital 42 Science Mission Directorate 42 XCOR Aerospace 42 Microgravity 42 Orbital Space 42 McNair Scholars 42 Darpa 42 Mike Suffredini 42 UT Battelle 42 NASA Authorization 42 human spaceflight 42 hypersonic flight 42 FIRST Lego League 42 Research ONR 42 AIAA 42 Intramural Research 42 National Reconnaissance