Related by context. Frequent words. (Click for all words.) 63 Keck Observatory 63 optical telescope 60 WM Keck Observatory 60 Pan STARRS 60 telescope 59 telescopes 58 Mauna Kea Hawaii 58 observatories 56 Thirty Meter Telescope 56 infrared telescope 54 optical telescopes 54 radiometer 53 ESO Very Large Telescope 53 Very Large Telescope 53 VLBA 52 Telescope 52 Lick Observatory 52 Arecibo Observatory 52 observatory 52 adaptive optics 52 Very Large Array 51 interplanetary spacecraft 51 Mauna Kea 51 Gemini Observatory 51 Kitt Peak 51 Observatories 50 interferometer 50 LSST 50 CALIPSO 50 IceCube 49 particle detector 49 LIGO 49 WFC3 49 VLBI 49 spacecraft orbiting 49 seismometer 49 orbiting Saturn 49 astronomical observatory 48 orbiting telescope 48 astronomical observations 48 THEMIS 48 Telescopes 48 radar altimeter 48 XMM Newton 48 Cancri 48 LCLS 48 seismometers 47 moon Charon 47 astronomers 47 National Optical Astronomy 47 New Horizons spacecraft 47 Milky Way Galaxy 47 JWST 47 seismographs 47 Galaxy Evolution 47 Palomar Observatory 47 microlensing 47 Thermal Emission Imaging 47 astrophysical 47 Celestron 47 Southern Observatory ESO 47 interferometry 46 COROT 46 X ray telescope 46 colliders 46 radial velocity 46 orbiting 46 CubeSat 46 planet orbits 46 SMOS 46 Astronomy 46 Cassini Huygens 46 NASA Cassini 46 OSIRIS 46 SPIRE 46 gravitational wave 46 Mini SAR 46 geostationary satellite 46 distant galaxy 45 polar orbiting 45 Jupiter Saturn 45 spectroscopic 45 celestial objects 45 celestial object 45 NRAO 45 Gravity Probe B 45 outer planets 45 optical microscope 45 geodetic 45 NASAs 45 Hinode 45 Jet Propulsion Laboratory JPL 45 La Silla Chile 45 CloudSat 45 Remote sensing 44 redshifts 44 Andromeda galaxy 44 EPOXI 44 Space Telescope 44 IODP 44 satellites