Related by context. Frequent words. (Click for all words.) 55 Dragon spacecraft 50 Centennial Challenges 46 X PRIZE 46 SpaceX 46 Crew Exploration 46 Orion spacecraft 44 Orion capsule 44 XCOR 44 Astrium 43 SPACEHAB 43 sub orbital 42 Systems Mission Directorate 42 Projects Agency DARPA 42 EADS Astrium 42 SBIR grant 42 STTR 42 unmanned lunar 42 EELV 41 COTS 41 IDIQ 41 Iridium NEXT 41 ARPA E 41 TacSat 41 NASA Space Shuttle 41 GOES R 41 PlanetSpace 41 TSAT 40 DARPA 40 IDIQ contract 40 Airborne Laser 40 Indefinite Delivery Indefinite Quantity 40 Dragon capsule 40 lunar exploration 40 AEHF 40 XCOR Aerospace 40 lunar lander 40 AFRL 40 CRADA 40 Arianespace 40 delivery indefinite quantity 39 X #B 39 Orbital Sciences 39 Ares rocket 39 human spaceflight 39 Orbital Sciences Corporation 39 suborbital 39 Task Order 39 Earth orbit 39 KC #A [002] 39 lunar orbiter 39 lunar rover 39 Missile Defense Command 38 NPOESS 38 SpaceShipTwo 38 manned spacecraft 38 JTRS 38 Orbital Sciences Corp. 38 Research SBIR 38 X #A 38 COMAC 38 #-# freighter 38 Scaled Composites 38 Joint Tactical 38 suborbital flights 38 SpaceDev 37 X Prize 37 Project BioShield 37 sustainment 37 Ares 37 Hubble servicing 37 Polar Satellite Launch 37 suborbital flight 37 JWST 37 Ansari X 37 Orbital 37 Space Exploration 37 Joint Strike Fighter JSF 37 robotic spacecraft 37 Thales Alenia Space 37 governmentwide 36 & Whitney Rocketdyne 36 Ares V 36 Spaceship 36 Shenzhou VII 36 Unmanned Aerial Vehicle 36 space shuttle 36 Taurus XL rocket 36 Automated Transfer Vehicle 36 Automotive X PRIZE 36 Missile Defense Agency 36 SBIR 36 Space Agency 36 spaceflight 36 BARDA 36 Soyuz rocket 36 JLTV 36 Russian Soyuz rocket 35 SBIRS 35 Future Combat 35 SpaceShipOne 35 Joint Strike Fighter