Related by context. Frequent words. (Click for all words.) 60 Orion Nebula 59 Crab Nebula 59 distant galaxy 58 celestial object 58 Andromeda galaxy 57 HD #b [002] 57 constellation Orion 56 constellation Leo 56 Betelgeuse 56 Fomalhaut 56 constellation Perseus 55 planetary nebula 55 Andromeda Galaxy 55 ringed planet 55 elliptical galaxies 54 supernova remnant 54 galaxy cluster 54 Gamma ray bursts 54 XMM Newton 54 gamma ray burst 54 Mimas 54 nebulae 54 infrared wavelengths 54 planet orbits 53 spiral galaxy 53 Spitzer Space Telescope 53 magnetar 53 moons 53 unaided eye 53 Saturn moon Enceladus 53 Eta Carinae 53 comet 53 Milky Way Galaxy 52 GRBs 52 aurora 52 auroras 52 nebula 52 distant galaxies 52 supernova 52 starburst 52 Gliese #g 52 supernova explosion 52 spiral galaxies 51 supernova remnants 51 X ray emission 51 astronomical objects 51 supermoon 51 haloes 51 planet orbiting 51 comet nucleus 51 extrasolar planets 51 reddish hue 50 moon Charon 50 galaxy clusters 50 visible wavelengths 50 brown dwarf 50 globular cluster 50 NASA Chandra 50 Leonid meteor shower 50 Venusian 50 GRB # 50 planets orbiting 50 ESO Very Large Telescope 50 quasars 50 Halley Comet 50 Saturn rings 50 planetoid 50 Hubble Telescope 50 exoplanets 50 auroral 50 planets 50 accretion disk 50 quasar 50 Very Large Telescope 50 supernovas 50 galaxies 50 Chandra X ray 50 gravitational lensing 49 celestial 49 moonrise 49 celestial objects 49 brown dwarfs 49 COROT 49 cosmic microwave background 49 orb 49 Kuiper belt 49 Iapetus 49 iridescence 49 luminosity 49 gamma ray bursts 49 Geminids 49 exoplanet 49 luminous 49 dwarf galaxy 49 galaxy 49 extrasolar planet 49 meteoroids 49 observable universe 49 Milky Way galaxy 49 starbursts 49 ecliptic