Related by context. Frequent words. (Click for all words.) 65 globular cluster 64 Orion Nebula 64 globular clusters 63 Milky Way Galaxy 63 Andromeda galaxy 63 Eta Carinae 62 supernova remnant 61 supernova explosion 61 spiral galaxy 61 Milky Way galaxy 60 distant galaxy 59 Large Magellanic Cloud 59 ringed planet 59 magnetar 59 nebula 58 X ray emission 58 galaxy cluster 58 unaided eye 57 dwarf galaxy 57 Betelgeuse 57 brown dwarf 57 Milky Way 57 nebulae 57 galaxies 56 elliptical galaxies 56 planet orbiting 56 planets orbiting 56 galaxy 56 brown dwarfs 56 Andromeda Galaxy 56 quasars 56 Kuiper belt 55 constellation Leo 55 GRBs 55 celestial object 55 supernova explosions 55 galaxy formation 55 spiral galaxies 55 Spitzer Space Telescope 54 distant galaxies 54 auroral 54 redshift 54 starbursts 54 Mimas 54 accretion disk 54 ejecta 54 quasar 54 Gliese 54 orbits 54 habitable planets 54 XMM Newton 53 COROT 53 comet nucleus 53 ESO Very Large Telescope 53 extrasolar planet 53 galaxy clusters 53 supernova 53 rocky planets 53 gamma ray burst 53 supermassive black hole 52 Gliese #g 52 planets 52 ecliptic 52 constellation 52 X ray Observatory 52 occultation 52 infrared wavelengths 52 supernovae 52 constellation Perseus 51 interstellar dust 51 astronomical objects 51 Scorpius 51 HD #b [002] 51 super Earths 51 supernovas 51 orbiting 51 Pleiades 51 exoplanet 51 sunspot 51 neutron stars 51 galactic 51 Lutetia 51 extrasolar planets 50 dwarf galaxies 50 z = 50 GeV 50 Saturn rings 50 Saturn moons 50 Saturn moon Enceladus 50 Earth magnetosphere 50 astronomers 50 ionized gas 50 neutron star 49 suns 49 astrophysical 49 terrestrial planets 49 exoplanets 49 Kuiper Belt 49 gamma ray bursts 49 pulsar 49 planetary