Related by context. Frequent words. (Click for all words.) 63 Orion Nebula 63 constellation Orion 60 Andromeda galaxy 60 globular cluster 60 Andromeda Galaxy 59 Crab Nebula 59 Betelgeuse 59 Milky Way Galaxy 58 distant galaxy 58 astronomical objects 58 supernova remnant 57 Fomalhaut 57 XMM Newton 57 spiral galaxy 56 galaxy 56 planet orbits 56 globular clusters 56 constellation Perseus 56 nebula 56 nebulae 55 galaxy cluster 55 Cancri 55 celestial object 55 supernova explosion 54 constellation Leo 54 Large Magellanic Cloud 54 Eta Carinae 54 visible wavelengths 54 planet orbiting 54 constellation 54 Kuiper belt 54 supernova remnants 53 distant galaxies 53 auroral 53 dwarf galaxy 53 X ray emission 53 Scorpius 53 HD #b [002] 53 unaided eye 53 extrasolar planets 52 gamma ray burst 52 spiral galaxies 52 magnetar 52 infrared wavelengths 52 brown dwarf 52 Pulsars 52 Milky Way 52 Mimas 52 planets orbiting 52 Voyager spacecraft 52 Saturn rings 52 Pleiades 51 COROT 51 GRBs 51 orb 51 interstellar dust 51 starburst 51 luminous 51 brown dwarfs 51 Milky Way galaxy 51 starbursts 51 auroras 51 haloes 51 Saturn moon Enceladus 51 elliptical galaxies 50 ringed planet 50 terrestrial planets 50 ejecta 50 comet 50 Gamma ray bursts 50 optical telescopes 50 quasars 50 interferometry 50 galaxies 50 dwarf galaxies 50 redshift 50 Cassiopeia 50 occultation 50 aurora 50 planets 50 habitable planets 50 Very Large Array 50 Spitzer Space Telescope 50 supernovas 50 orbits 50 accretion disk 50 NASA Cassini spacecraft 50 infrared telescope 49 constellations 49 astrophysical 49 Solar System 49 quasar 49 supernova explosions 49 comet nucleus 49 Orbiting 49 OGLE 49 orbiting 49 Arcturus 49 supernova 49 extrasolar planet 49 galactic