Related by context. Frequent words. (Click for all words.) 64 Very Large Telescope 58 ESO Very Large Telescope 56 optical telescope 53 WM Keck Observatory 53 telescope 52 optical telescopes 52 XMM Newton 52 infrared telescope 51 interferometer 50 X ray Observatory 50 COROT 50 microlensing 50 telescopes 49 astronomers 49 NASA Chandra 49 observatories 49 Observatories 48 X ray telescope 48 planet orbits 48 planet orbiting 48 ESRF 47 OGLE 47 Observatory 47 Telescope 47 interferometry 47 Very Large Array 47 Spitzer Space Telescope 47 Palomar Observatory 47 Large Magellanic Cloud 46 MARSIS 46 Andromeda Galaxy 45 observatory 45 adaptive optics 45 CALIPSO 45 astronomical observatory 45 NASA ESA Hubble 45 Gemini Observatory 45 Orion Nebula 45 infrared wavelengths 45 Resolution Imaging 45 globular cluster 45 Kitt Peak 45 Space Telescope 44 astronomical observations 44 extrasolar planet 44 orbiting Saturn 44 journal Astronomy 44 spectrometers 44 Arecibo Observatory 44 HD #b [002] 44 hyperspectral 44 HARPS 44 gravitational lensing 44 spectrometer 44 Space Agency 44 HRSC 44 IceCube 43 NASA Kepler 43 Cassini Huygens 43 extrasolar planets 43 Fomalhaut 43 Saturn moon Enceladus 43 Andromeda galaxy 43 orbiting 43 NASA Mars Odyssey 43 Spectrometer 43 Astronomers 43 dwarf galaxies 43 LIGO 43 orbiting spacecraft 42 astrophysicists 42 planets orbiting 42 super Earths 42 optical microscope 42 unaided eye 42 beamline 42 scanning electron microscope 42 volcanically active 42 Milky Way Galaxy 42 transmission electron microscope 42 astrophysical 42 NASA Cassini spacecraft 42 field Infrared Survey 42 Polar Regions 42 dwarf galaxy 42 X ray emission 42 Telescopes 42 optical microscopy 42 spectrograph 42 Lick Observatory 42 spectroscopic 42 NICMOS 42 JWST 42 ESO 41 interplanetary spacecraft 41 gamma ray bursts 41 GRBs 41 SKA 41 Advanced Camera 41 Betelgeuse 41 galaxy clusters