Related by context. Frequent words. (Click for all words.) 68 distant galaxies 67 quasars 66 brown dwarfs 66 quasar 66 distant galaxy 65 galaxies 65 supernovae 65 galaxy clusters 64 infrared wavelengths 63 cosmic microwave background 62 spectra 62 gamma ray burst 62 exoplanet 62 brown dwarf 61 gamma ray bursts 61 exoplanets 60 WMAP 60 wavelengths 60 spectroscopic 60 dwarf galaxies 60 Milky Way galaxy 59 extrasolar planets 59 supernova 58 pulsars 58 astronomers 57 cosmic ray 57 gamma ray 57 spatial resolution 57 gravitational waves 57 rocky planets 57 pulsar 57 spiral galaxy 57 neutron star 56 neutron stars 56 neutrinos 56 gamma rays 56 Milky Way 56 planet orbiting 56 SDSS 56 velocities 56 luminosity 56 cosmic rays 55 supermassive black hole 55 neutrino 55 planets orbiting 55 nebula 54 wavelength 54 photons 54 galaxy 54 orbits 54 astrophysical 54 isotopic 54 supermassive black holes 54 supernovas 54 spectroscopy 53 reflectance 53 Very Large Telescope 53 planets 53 NASA Chandra 53 THz 53 diffraction 53 cosmologists 53 X ray Observatory 53 fainter 53 albedo 53 photon 53 Saturn rings 53 positrons 52 Astrophysical Journal 52 general relativity 52 infrared radiation 52 GRB 52 spectral 52 cosmological 52 Astrophysical Journal Letters 52 Gliese 52 celestial objects 51 Kuiper Belt 51 Raman spectroscopy 51 parallax 51 Space Telescope 51 reflectivity 51 intensities 51 nebulae 51 laser pulses 51 deuterium 50 magnetization 50 Enceladus 50 astrophysicists 50 nuclei 50 Spitzer Space Telescope 50 brightness 50 Sedna 50 Einstein theory 50 starlight 50 UB# [003] 49 Astronomers 49 conductance 49 ionosphere 49 troposphere 49 spectrograph