Related by context. Frequent words. (Click for all words.) 64 infrared telescope 57 spacecraft 57 XMM Newton 57 telescope 57 NASA Chandra 57 X ray Observatory 56 orbiting 56 spectrometer 56 Very Large Telescope 54 orbiting spacecraft 54 GLAST 54 Spitzer Space Telescope 54 optical telescope 53 Space Telescope 53 telescopes 53 Spectrometer 53 NASA Cassini spacecraft 53 extrasolar planet 53 orbiting observatory 53 COROT 53 NASA Kepler 53 spectrograph 53 Hubble Space Telescope 52 Cassini Huygens 52 GOCE 52 infrared spectrometer 52 Cassini spacecraft 52 CloudSat 51 Cassini orbiter 51 Lunar Reconnaissance Orbiter 51 interferometer 51 interferometry 51 optical telescopes 51 Advanced Camera 51 Resolution Imaging 51 orbiting telescope 51 infrared camera 51 exoplanet 51 orbiter 50 remote sensing satellite 50 ESO Very Large Telescope 50 Orbiting Carbon Observatory 50 astronomers 50 microsatellite 50 remote sensing satellites 50 lunar orbiter 50 spectrometers 50 observatory 50 adaptive optics 49 astrophysical 49 robotic spacecraft 49 satellites 49 WMAP 49 Solar Dynamics 49 Geostationary Operational Environmental 49 Hubble Telescope 49 field Infrared Survey 49 gamma ray burst 49 extrasolar planets 49 panoramic camera 49 spectroscopic 48 Mars Reconnaissance Orbiter 48 Cassini 48 Envisat 48 Stardust spacecraft 48 Chandra X ray 48 HD #b [002] 48 NASA Goddard 48 IceCube 48 NASA Aqua 48 JWST 48 Orbiter 48 astronomical observations 48 asteroid 48 imager 48 Earth magnetosphere 48 Applied Physics Laboratory 48 LCROSS 48 remote sensing 48 Smithsonian Astrophysical Observatory 48 thermal emission spectrometer 48 optical microscope 47 Moderate Resolution 47 multispectral 47 THEMIS 47 exoplanets 47 unmanned lunar 47 MODIS 47 rover Opportunity 47 planets orbiting 47 gamma ray bursts 47 lunar surface 47 infrared 47 observatories 47 astrophysics 47 distant galaxy 47 transmission electron microscope 47 astronomer 47 cosmic microwave background 47 Space Agency 47 planet orbiting