Related by context. Frequent words. (Click for all words.) 47 XMM Newton 45 brown dwarfs 45 quasars 44 quasar 43 supernova 43 Nebula 43 nebulae 42 X ray Observatory 42 supernovae 42 gamma ray burst 42 redshift 42 NASA Chandra 42 galaxy clusters 42 Spitzer Space Telescope 42 extrasolar planets 41 SDSS 41 brown dwarf 41 GRB 40 Betelgeuse 40 pulsars 40 supernovas 39 Astronomers 39 planet orbiting 39 spectroscopic 39 dwarf galaxies 39 AGN 38 cosmic microwave background 38 Andromeda 38 Sedna 38 astronomers 38 supermassive black holes 38 distant galaxy 38 comet 37 spectra 37 gamma ray bursts 37 Iapetus 37 corona 37 planets orbiting 37 astrophysicists 37 pulsar 37 distant galaxies 37 comets 37 Astrophysical Journal 37 galaxies 36 exoplanet 36 neutron stars 36 neutron star 36 Astrophysical Journal Letters 36 WMAP 36 spiral galaxy 35 Saturn rings 35 suns 35 Enceladus 35 infrared wavelengths 35 NGC 35 Solar System 35 supermassive black hole 34 nebula 34 Milky Way galaxy 34 ringed planet 34 planets 34 Cassiopeia 34 CMEs 33 Milky Way 33 galaxy 33 Arcturus 33 Galaxies 32 fainter 32 Pleiades 32 luminosity 32 Very Large Telescope 32 moons 31 celestial objects 31 ESO 31 Sagittarius 31 Kuiper Belt 30 starburst 30 constellation 30 Jupiter 29 meteor shower 29 equatorial 28 Cassini 28 orbiting 28 Jupiters 27 Pluto 27 JWST 27 VERITAS 26 J# [002] 25 GLAST 25 starlight 25 Cygnus 24 constellations 22 Saturn 22 Neptune 21 EOH 20 PCGS 18 AGL 17 PetroSA 15 GRC 11 Metcash 8 ANC