Related by context. Frequent words. (Click for all words.) 53 constellation Leo 52 constellation Orion 51 Cancri 50 planet orbits 49 Orion Nebula 49 Milky Way Galaxy 48 globular cluster 48 Andromeda Galaxy 47 spiral galaxy 47 Procyon 46 distant galaxy 46 Andromeda galaxy 46 Fomalhaut 46 planetary nebula 45 galaxy 45 HD #b [002] 45 Crab Nebula 44 Milky Way 44 Scorpius 44 Arcturus 44 Betelgeuse 43 Large Magellanic Cloud 43 Kuiper belt 43 planets orbiting 43 constellation Perseus 43 Sedna 42 nebula 42 terrestrial planets 42 ecliptic 42 Sunspot 42 Pulsars 41 astronomical objects 41 galaxy cluster 41 celestial object 41 planet orbiting 41 brown dwarf 41 dwarf galaxy 41 nebulae 41 Andromeda 41 unaided eye 41 globular clusters 41 subatomic particle 40 spiral galaxies 40 Eta Carinae 40 Milky Way galaxy 40 Mimas 40 exoplanets 40 Orbiting 40 rocky planets 40 Sunspots 40 WIMPs 40 Alpha Centauri 40 galactic 40 Ursa Major 40 planets 40 Aldebaran 40 suns 39 Little Dipper 39 Solar System 39 Gamma ray bursts 39 extrasolar planet 39 supernova remnant 39 Pleiades 39 Deneb 39 asteroid belt 39 supernova explosion 39 Earth magnetosphere 38 Jupiter Saturn 38 distant galaxies 38 hot Jupiters 38 ionized gas 38 GeV 38 quasar 38 Pluto 38 infrared wavelengths 38 visible wavelengths 38 orbits 38 galaxies 38 Gliese 38 planetoid 38 observable universe 38 dwarf galaxies 37 Kuiper Belt 37 habitable planets 37 Nebula 37 Uranus 37 constellation 37 super Earths 37 brown dwarfs 37 Gliese #g 37 fainter 37 Galaxies 37 Neutrinos 37 exoplanet 36 Cassiopeia 36 celestial objects 36 outer planets 36 Deimos 36 extrasolar planets 36 Earth 36 Antimatter