Related by context. Frequent words. (Click for all words.) 66 Terrestrial Planet Finder 63 JPL manages 58 Credits ESA 58 OSIRIS REx 58 NASA Kepler 56 interplanetary spacecraft 56 NASAs 55 Stratospheric Observatory 55 Exoplanet 55 spaceborne 54 MAVEN 54 GALEX 54 Herschel Space 53 NASA GSFC 53 planetary missions 53 Lunar Reconnaissance Orbiter LRO 53 Pan STARRS 52 NOAO 52 COSMO SkyMed 52 polar orbiting 52 interplanetary missions 52 geosynchronous 52 laser altimeter 51 COROT 51 STScI 51 SIRTF 51 Seth Shostak 51 Kepler spacecraft 51 imaging spectrometer 51 OSIRIS 51 E ELT 50 astronomical telescope 50 OOI 50 CALIPSO 50 Altair lunar lander 50 Suborbital 50 Mini SAR 50 satellite constellation Iridium 49 Astrophysicist 49 Square Kilometre Array 49 Synthetic Aperture Radar 49 Huntsville Ala. manages 49 Astrobotic 49 Lunar Exploration 49 Astronauts inspect 49 PPARC 49 WFC3 49 nicknamed Xena 49 SCIENCE AND 49 LOFAR 49 A# spacecraft 48 IYA# 48 planetary exploration 48 Cassini Huygens 48 MISSIONS 48 AKARI 48 Security GMES 48 Chairman G Madhavan 48 EarthScope 48 Flyby 48 extrasolar planets 48 CubeSat 48 LINEAR 48 Vehicle CEV 48 solar corona 48 Earth orbiting satellites 48 infrared telescopes 48 Square Kilometre Array SKA 48 Stardust NExT 48 GLAST 48 Compton Gamma Ray 48 ST5 48 robotic rovers 48 polar orbits 48 STEREO spacecraft 48 Nhat V. Meyer 48 Bad Astronomy 48 Crew Launch Vehicle 48 Proba 2 47 Atlantis STS 47 SMOS 47 Ed Weiler NASA 47 Jill Tarter 47 Earthlike planets 47 DEVELOP 47 NASA Goddard 47 VIRTIS 47 Heliospheric Observatory SOHO 47 Spectrometers 47 Extra Terrestrial Intelligence 47 Cryosat 47 commercial bioproduction 47 Moon Mineralogy Mapper 47 Adaptive Optics 47 MESSENGER 47 Tropical Rainfall Measuring 47 Hubble Telescope 47 manned lunar 47 Interferometer 47 polar orbiting satellites 47 MeerKAT