Related by context. Frequent words. (Click for all words.) 71 Orion Nebula 66 Andromeda galaxy 65 Large Magellanic Cloud 65 spiral galaxy 62 globular cluster 62 galaxy cluster 62 Milky Way Galaxy 62 supernova remnant 62 XMM Newton 61 nebula 61 Crab Nebula 61 planet orbits 60 globular clusters 60 Andromeda Galaxy 60 planet orbiting 60 Eta Carinae 59 HD #b [002] 59 distant galaxy 59 Kuiper belt 59 elliptical galaxies 59 constellation Orion 59 planets orbiting 59 dwarf galaxy 59 Milky Way galaxy 59 Milky Way 58 brown dwarf 58 Fomalhaut 58 Cancri 58 nebulae 58 spiral galaxies 57 Spitzer Space Telescope 57 X ray emission 57 galaxy 57 magnetar 57 Betelgeuse 57 ionized gas 56 celestial object 56 rocky planets 56 brown dwarfs 56 galaxies 56 quasars 56 constellation Leo 55 unaided eye 55 Mimas 55 quasar 55 supermassive black hole 55 dwarf galaxies 55 supernova explosion 54 gamma ray burst 54 constellation Perseus 54 distant galaxies 54 Gliese #g 54 extrasolar planet 54 Gamma ray bursts 54 supernovae 54 COROT 53 accretion disk 53 supernova 53 ESO Very Large Telescope 53 ringed planet 53 extrasolar planets 53 GRBs 52 starbursts 52 microlensing 52 supernova explosions 52 supernovas 52 moon Charon 52 comet nucleus 52 Saturn moons 52 exoplanets 52 optical telescopes 52 ejecta 51 Pleiades 51 galaxy clusters 51 supermassive black holes 51 volcanic crater 51 astronomical objects 51 infrared telescope 51 Saturn moon 51 visible wavelengths 51 infrared wavelengths 51 Saturn moon Enceladus 51 volcanically active 50 habitable planets 50 exoplanet 50 terrestrial planets 50 Very Large Telescope 50 redshift 50 heliosphere 50 X ray Observatory 50 OGLE 50 NASA ESA Hubble 50 Kuiper Belt 50 celestial objects 50 hot Jupiters 50 auroral 49 planets 49 interstellar dust 49 Solar System 49 Jupiter Saturn 49 Very Large Array