Related by context. Frequent words. (Click for all words.) 76 WM Keck Observatory 62 infrared telescope 60 Very Large Telescope 60 telescopes 60 ESO Very Large Telescope 59 XMM Newton 59 optical telescopes 59 telescope 59 Palomar Observatory 58 optical telescope 58 Thirty Meter Telescope 58 NASA Chandra 58 observatories 57 astronomers 56 Observatories 56 planetary scientist 56 observatory 56 Mauna Kea 55 IceCube 55 Very Large Array 55 astronomical observatory 55 gravitational lensing 54 adaptive optics 54 LSST 54 Hinode 54 LIGO 54 Telescope 54 seismometers 53 X ray Observatory 53 Spitzer Space Telescope 53 COROT 53 Lowell Observatory 53 NASA Cassini spacecraft 53 orbiting telescope 53 NASA Mars Odyssey 53 THEMIS 53 spectroscopic 52 Cassini imaging 52 interferometer 52 MODIS 52 Cassini Huygens 52 astronomical observations 52 HiRISE 52 astronomer 52 Astrophysics 52 JILA 52 Space Telescope 51 NASA Astrobiology Institute 51 NASA Goddard 51 Jet Propulsion Laboratory JPL 51 CloudSat 51 gravitational wave 51 NASA Aqua 51 Smithsonian Astrophysical Observatory 51 seismographs 50 seismometer 50 astrophysicists 50 scanning electron microscope 50 NRAO 50 Resolution Imaging 50 Astronomy 50 Kavli Institute 49 extrasolar planets 49 Chandra X ray 49 credit NASA JPL 49 NASA Ames 49 Observatory 49 planetary science 49 NASA Kepler 49 Mars Reconnaissance Orbiter 49 Scripps Institution 49 Planetary Laboratory 49 JWST 49 Hubble 49 Hubble Space Telescope 49 astrophysical 48 infrared spectrometer 48 Gravity Probe B 48 WMAP 48 HARPS 48 Opportunity rover 48 distant galaxies 48 infrared wavelengths 48 Telescopes 48 cosmic ray 48 Milky Way Galaxy 48 distant galaxy 48 TRMM 48 Cassini 48 Jet Propulsion Laboratory 48 celestial object 48 GOCE 48 NASA Mars Reconnaissance 48 Astronomers 47 interferometry 47 transmission electron microscope 47 Harvard Smithsonian 47 Applied Physics Laboratory 47 hyperspectral 47 Spectrometer 47 Moderate Resolution