Related by context. Frequent words. (Click for all words.) 61 orbiting telescope 61 spectrograph 57 spectrometer 57 telescope 56 orbiting observatory 56 Hubble telescope 55 Spectrometer 54 Hubble Telescope 54 Hubble Space Telescope 54 Hubble 54 COROT 54 JWST 54 Advanced Camera 54 CloudSat 53 spectrometers 53 Lunar Reconnaissance Orbiter 53 Cassini orbiter 53 ESO Very Large Telescope 52 adaptive optics 52 NASA Lunar Reconnaissance 52 telescopes 52 interferometer 52 Resolution Imaging 51 ICESat 51 GLAST 51 Cassini Huygens 51 Alpha Magnetic Spectrometer 51 transmission electron microscope 51 multispectral 51 Webb Space Telescope 51 Geostationary Operational Environmental 50 infrared telescope 50 Stardust spacecraft 50 THEMIS 50 XMM Newton 50 CCD camera 50 Space Telescope 50 optical telescope 50 NASA Kepler 50 Cassini 49 imager 49 Orbiting Carbon Observatory 49 LIGO 49 IceCube 49 Spacewalkers 49 NASA Mars Odyssey 49 Applied Physics Laboratory 49 femtosecond 49 Very Large Telescope 48 mass spectrometer 48 MESSENGER 48 NASA Cassini spacecraft 48 solar arrays 48 mass spectrometers 48 hyperspectral 48 spacewalking astronauts 48 spacecraft 48 optical telescopes 48 Gravity Probe B 48 infrared spectrometer 48 spacewalkers 48 orbiting spacecraft 48 GOES R 47 Saturn rings 47 optical microscope 47 truss segment 47 beamline 47 Comet Tempel 1 47 Mars orbiter 47 Solar Dynamics 47 New Horizons spacecraft 47 spectroscopic 47 panoramic camera 47 GOCE 47 astronomical observations 47 LCROSS 47 GPS satellites 47 arrays 47 NASA Hubble Space 47 Two spacewalking astronauts 47 Mars Reconnaissance Orbiter 47 substorms 47 shuttle robotic arm 47 Discovery astronauts 46 NASA Mars Reconnaissance 46 NASA Chandra 46 scanning electron microscope 46 Earth magnetosphere 46 interferometry 46 remote sensing 46 field Infrared Survey 46 CryoSat 46 generating solar arrays 46 Spitzer Space Telescope 46 infrared camera 46 observatory 46 ringed planet 46 Palomar Observatory 46 distant galaxies 46 comet nucleus 46 ExoMars