Related by context. Frequent words. (Click for all words.) 64 Gliese #g 63 HD #b [002] 61 Sedna 61 magnetar 60 extrasolar planet 60 Kuiper belt 60 distant galaxy 58 UB# [003] 58 COROT 58 brown dwarf 57 moon Charon 57 dwarf planet 57 exoplanet 57 Eta Carinae 57 globular cluster 57 extrasolar planets 57 OGLE 56 Orion Nebula 56 cosmic ray 56 galaxy cluster 56 outer planets 56 asteroid 56 astronomers 55 celestial object 55 brown dwarfs 55 dwarf planets 55 XMM Newton 55 planet orbiting 55 super Earths 55 dwarf galaxy 55 comet nucleus 55 X ray emission 55 exoplanets 54 comet 54 Crab Nebula 54 Halley Comet 54 hot Jupiters 54 planets 54 Saturn rings 54 planets orbiting 54 volcanically active 54 meteoroid 54 Andromeda galaxy 54 Cassini Huygens 53 supernova remnant 53 Andromeda Galaxy 53 dwarf galaxies 53 supernova 53 Milky Way Galaxy 53 habitable planet 53 Kuiper Belt 53 unaided eye 53 supernova explosion 53 Fomalhaut 52 Itokawa 52 globular clusters 52 infrared telescope 52 galaxy 52 asteroids 52 Solar System 52 rocky planets 52 astronomical objects 52 sunspot 52 NASA Cassini spacecraft 52 comets 52 moons 52 ejecta 51 astrophysicists 51 meteoroids 51 Uranus 51 habitable planets 51 Saturn moons 51 Jupiter moons 51 Astronomers 51 Geminids 51 cometary 51 redshift 51 pulsars 51 gamma ray burst 51 gravitational wave 51 Saturn moon 51 cosmic rays 51 Spitzer Space Telescope 51 neutrino 51 WIMPs 51 orbiting 51 occultation 50 distant galaxies 50 geologically active 50 Gliese 50 interstellar dust 50 moon Europa 50 Iapetus 50 solar flares 50 orbits 50 Mimas 50 ringed planet 50 Lutetia 50 celestial bodies 50 supernova explosions 50 quasars