Related by context. Frequent words. (Click for all words.) 60 Andromeda galaxy 58 Kuiper belt 58 Jupiter Saturn Uranus 57 distant galaxy 56 moons 56 Milky Way galaxy 56 galaxy 56 Milky Way Galaxy 56 moon Charon 56 outer planets 55 planet orbiting 55 nebulae 55 comet 55 moon Europa 55 HD #b [002] 55 unaided eye 55 moon Titan 54 interstellar dust 54 Andromeda Galaxy 54 Uranus 54 rocky planets 54 X ray emission 54 spiral galaxy 54 Milky Way 54 meteoroids 54 Saturn moons 54 planets 54 comet nucleus 54 supernova explosion 54 orbiting 54 Saturn rings 54 super Earths 53 ejecta 53 Orion Nebula 53 asteroid belt 53 terrestrial planets 53 galaxy cluster 53 constellation Leo 53 Iapetus 53 accretion disk 53 galaxies 53 galaxy clusters 53 Betelgeuse 53 orbits 53 nebula 53 hot Jupiters 53 spiral galaxies 53 Mimas 53 ringed planet 52 magnetar 52 Solar System 52 optical telescopes 52 supernova explosions 52 Eta Carinae 52 Jupiter 52 neutron star 52 globular cluster 52 accreting 52 Earth magnetosphere 52 celestial object 52 elliptical galaxies 52 gravitationally 52 distant galaxies 51 umbra 51 dwarf galaxy 51 quasars 51 infrared wavelengths 51 Ganymede 51 Jupiter moons 51 quasar 51 Sedna 51 fainter 51 planets orbiting 51 globular clusters 51 Spitzer Space Telescope 51 extrasolar planets 50 infrared telescope 50 dwarf galaxies 50 Lutetia 50 Crab Nebula 50 magnetosphere 50 ionized gas 50 celestial 50 astronomers 50 planetary 50 comets 50 cosmos 50 telescopes 50 cosmic microwave background 49 Kuiper Belt 49 universe 49 supernovas 49 supernova remnant 49 Saturn moon 49 extrasolar planet 49 meteoroid 49 supernova 49 Comet Tempel 1 49 COROT 49 astronomical objects 49 lithosphere