Related by context. Frequent words. (Click for all words.) 59 spacecraft 58 orbiting observatory 58 flyby 57 lunar orbit 56 orbit 55 Cassini Huygens 53 GOCE 53 robotic spacecraft 53 flybys 53 thruster 53 orbiter 52 Lyndin 52 circular orbit 52 orbiting 51 orbits 51 orbital 51 thrusters 51 Hubble 50 NASA Cassini spacecraft 50 Global Surveyor 50 Commander Eileen 50 Shenzhou V 50 Ares IX 50 Orbiter 50 Gravity Probe B 50 orbiting telescope 49 PASADENA Calif. NASA 49 Deep Impact mission 49 rover Opportunity 49 unmanned lunar 49 Cassini 49 Comet Tempel 1 49 MESSENGER 49 Jet Propulsion Laboratory JPL 49 JAXA 49 XMM Newton 48 Hubble Space Telescope 48 Hubble servicing 48 Huygens probe 48 NASA Jet Propulsion Laboratory 48 Space Shuttle Discovery 47 Chandrayaan 47 COROT 47 comet nucleus 47 GLAST 47 Mars Reconnaissance Orbiter 47 undocking 47 Flight Readiness 47 NASA 47 lander 47 Itokawa 47 Caldwell Dyson 47 Huygens 47 scramjet 47 Shuttle Atlantis 47 Discovery astronauts 47 Shenzhou VII 47 Space Shuttle Atlantis 47 occultation 47 shuttle disintegrated 46 space shuttle Discovery 46 JWST 46 geosynchronous orbit 46 Cassini spacecraft 46 perigee 46 Gorie 46 elliptical orbit 46 outer planets 46 Hayabusa 46 orbiting spacecraft 46 liftoff 46 impactor 46 LCROSS 46 Shuttle Discovery 46 CryoSat 45 spacecrafts 45 orbiters 45 NASA Space Shuttle 45 Orion spacecraft 45 undocked 45 LRO 45 unmanned spacecraft 45 comet Wild 45 blastoff 45 Space Shuttle Program 45 Earth orbit 45 TacSat 45 ICESat 45 STS 45 Shuttle astronauts 45 Dragon spacecraft 45 Discovery liftoff 45 External Tank 45 spokesman Valery Lyndin 45 Shenzhou VI 45 orbited 45 International Space Station 44 director Holly Ridings 44 propellant 44 performed flawlessly 44 Space Shuttle