Related by context. Frequent words. (Click for all words.) 64 distant galaxy 64 HD #b [002] 62 magnetar 62 extrasolar planet 61 redshift 60 brown dwarf 60 gamma ray burst 59 exoplanet 59 Sedna 59 exoplanets 59 Eta Carinae 57 galaxy cluster 57 extrasolar planets 57 brown dwarfs 57 unaided eye 56 planet orbiting 56 supernova remnant 55 quasars 55 rocky planets 55 XMM Newton 55 distant galaxies 55 globular cluster 55 Large Magellanic Cloud 55 GRBs 55 astronomical objects 55 COROT 54 supernovae 54 Andromeda Galaxy 54 Orion Nebula 54 Gliese 53 planets orbiting 53 supernova 53 globular clusters 53 WIMPs 53 hot Jupiters 53 astronomers 52 pulsars 52 dwarf galaxy 52 super Earths 52 Andromeda galaxy 52 gravitational wave 52 X ray emission 52 WM Keck Observatory 52 quasar 51 gravitational lensing 51 Jupiter moons 51 gamma ray bursts 51 Milky Way Galaxy 51 Milky Way galaxy 51 spiral galaxies 51 muon 50 astronomical observations 50 spectroscopic 50 infrared telescope 50 infrared wavelengths 50 optical telescopes 50 pulsar 50 Milky Way 50 UB# [003] 50 NASA Kepler 50 optical telescope 50 celestial objects 50 Spitzer Space Telescope 50 Betelgeuse 50 galaxy 50 spiral galaxy 50 supernova explosion 50 cosmic microwave background 50 elliptical galaxies 49 planets 49 neutrino 49 moon Titan 49 interstellar dust 49 gamma rays 49 galaxies 49 neutrinos 49 Very Large Array 49 supernova explosions 49 occultation 49 ejecta 49 dwarf galaxies 49 terrestrial planets 49 Cassiopeia 49 Saturn moons 49 Astrophysical Journal Letters 49 Iapetus 48 Very Large Telescope 48 NASA Cassini spacecraft 48 nebula 48 Astrophysical Journal 48 gamma ray 48 Cassini Huygens 48 HARPS 48 supermassive black hole 48 Geminids 48 orbiting telescope 48 X ray Observatory 47 comet nucleus 47 neutron stars 47 positrons 47 circular orbit