Related by context. Frequent words. (Click for all words.) 64 ESO Very Large Telescope 64 Very Large Telescope 64 telescopes 62 optical telescopes 62 adaptive optics 60 NASA Chandra 60 observatories 59 optical telescope 58 Telescope 58 astronomers 58 Spitzer Space Telescope 58 XMM Newton 58 telescope 57 spectroscopic 57 gravitational lensing 57 X ray Observatory 57 Mauna Kea 55 distant galaxies 54 interferometry 54 distant galaxy 54 galaxy clusters 54 exoplanet 54 Observatories 54 interferometer 54 quasars 53 Space Telescope 53 extrasolar planets 53 planets orbiting 53 astrophysicists 53 galaxy cluster 52 infrared wavelengths 52 transmission electron microscope 52 redshift 52 Astrophysics 52 HD #b [002] 52 planet orbiting 52 NASA Cassini spacecraft 52 Milky Way Galaxy 52 JILA 52 Astronomers 51 WMAP 51 Chandra X ray 51 astrophysical 51 dwarf galaxy 51 extrasolar planet 51 Telescopes 51 IceCube 50 supernovae 50 exoplanets 50 Astronomy 50 GRBs 50 observatory 50 dwarf galaxies 50 gamma ray burst 50 elliptical galaxies 50 galaxies 50 quasar 50 NASA Astrobiology Institute 50 Large Magellanic Cloud 50 Astrophysical Journal 49 Spectrometer 49 THEMIS 49 HiRISE 49 pulsars 49 celestial objects 49 rocky planets 49 optical microscope 49 Advanced Camera 49 cosmic microwave background 49 synchrotron 49 Radio Astronomy Observatory 49 neutrino 49 spectrograph 49 seismometers 48 Cassini spacecraft 48 Mars Reconnaissance Orbiter 48 supernovas 48 Astrophysical Journal Letters 48 gamma ray bursts 48 planetary scientist 48 Hubble Space Telescope 48 comet nucleus 48 Observatory 48 globular clusters 48 Lowell Observatory 48 astronomer 48 spectroscopy 48 Milky Way galaxy 48 cosmic ray 48 Technology Caltech 48 Planetary Laboratory 48 Eta Carinae 48 gravitational waves 48 Orion Nebula 48 NASA Mars Odyssey 47 RIKEN 47 neutron stars 47 SDSS 47 MODIS 47 Smithsonian Astrophysical Observatory 47 supernova explosion