Related by context. Frequent words. (Click for all words.) 63 NASA Kepler 61 COROT 60 orbiting telescope 60 MAVEN 60 NASAs 59 Lunar Reconnaissance Orbiter 59 robotic spacecraft 59 CALIPSO 58 MetOp 58 JWST 58 ExoMars 58 radial velocity 58 interplanetary spacecraft 58 SMOS 58 OSIRIS 58 Cassini Huygens 57 Mars orbiter 57 polar orbiting 57 orbiting observatory 57 New Horizons spacecraft 57 planetary missions 56 Stardust NExT 56 microlensing 56 Stardust spacecraft 56 particle physics detector 56 Messenger spacecraft 56 LCROSS mission 56 NASA Cassini 56 Mini SAR 55 WFC3 55 extrasolar planets 55 SELENE 55 Webb Telescope 55 Cosmic Origins Spectrograph 55 infrared telescope 55 innermost planet 55 Orbiting Carbon Observatory 55 XMM Newton 55 GLAST 55 particle detector 55 Hubble 55 Mars Pathfinder 55 TacSat 55 MESSENGER 55 spacecraft 55 orbiting Saturn 55 solar corona 55 rover Opportunity 54 PASADENA Calif. NASA 54 Hubble telescope 54 Gravity Probe B 54 EPOXI 54 STIS 54 Flyby 54 NICMOS 54 THEMIS 54 Resourcesat 2 54 Mauna Kea Hawaii 54 GOCE 54 spaceplane 54 spacecraft orbiting 54 Discovery STS 54 JPL manages 54 ICESat 53 unmanned lunar 53 Pan STARRS 53 CloudSat 53 Alpha Magnetic Spectrometer 53 NASA Lunar Reconnaissance 53 asteroid Itokawa 53 CubeSat 53 Hubble observations 53 orbiting spacecraft 53 ESA Mars 53 Cassini 53 extrasolar planet 53 Galaxy Evolution 53 Hubble Telescope 53 orbiting 53 WASP #b 53 Hubble Space Telescope 53 Hubble servicing 53 particle physics experiment 53 radar altimeter 53 robotic explorers 53 field Infrared Survey 53 orbiting Mars 53 Mars rover 53 exoplanets 53 telescope 53 asteroid 52 ion propulsion 52 Mars Lander 52 spectrograph 52 twin rovers 52 rover Spirit 52 flyby 52 adaptive optics 52 galaxy formation 52 Oceansat 2 52 Orion Crew