Related by context. Frequent words. (Click for all words.) 67 Palomar Observatory 64 WM Keck Observatory 57 observatory 56 ESO Very Large Telescope 56 astronomer 55 telescopes 54 planetary scientist 53 optical telescopes 53 Jet Propulsion Laboratory JPL 53 Lowell Observatory 52 optical telescope 52 telescope 52 XMM Newton 51 NASA Ames 51 observatories 51 Observatory 50 IBM Almaden Research 50 extrasolar planets 50 LLNL 50 adaptive optics 50 spectroscopic 50 astronomical observatory 50 infrared wavelengths 49 Caltech 49 Observatories 49 Griffith Observatory 49 Very Large Telescope 49 Cassini imaging 49 Laboratory Pasadena 49 NASA Goddard 49 LIGO 48 astronomy 48 Telescope 48 THEMIS 48 NASA Jet Propulsion Laboratory 48 astronomers 48 HiRISE 48 Stanford Linear Accelerator 48 Jet Propulsion Laboratory 48 Mauna Kea 48 NASA Chandra 48 Spitzer Space Telescope 47 Smithsonian Astrophysical Observatory 47 Astrophysics 47 planets orbiting 47 infrared telescope 47 Very Large Array 47 Planetary Laboratory 47 Technology Caltech 47 JWST 47 IceCube 47 gravitational lensing 47 Astronomer 47 X ray emission 47 Kavli Institute 46 Mount Diablo 46 CalTech 46 LBNL 46 LSST 46 SDSC 46 El Capitan 46 Eta Carinae 46 Berkeley Lab 46 UC Berkeley 46 Space Telescope 46 astrophysicist 46 interferometer 46 credit NASA JPL 46 quasars 46 Astronomy 46 supernovae 46 JPL 46 Harvard Smithsonian 46 Radio Astronomy Observatory 46 astrophysical 46 orbiting telescope 45 San Diego Supercomputer 45 amateur astronomer 45 Calit2 45 elliptical galaxies 45 redshift 45 Betelgeuse 45 NASA Kepler 45 Carnegie Institution 45 WM Keck Foundation 45 glaciologist 45 SETI Institute 45 Orion Nebula 45 Space Telescope Science 45 Gravity Probe B 45 National Ignition Facility 45 astronomical observations 45 Palomar Mountain 45 dwarf galaxy 44 distant galaxy 44 distant galaxies 44 occultation 44 San Diego UCSD 44 NASA Cassini spacecraft 44 Mono Lake 44 gravitational wave