Related by context. Frequent words. (Click for all words.) 52 supernova explosion 51 dwarf galaxy 51 nebulae 51 brown dwarf 51 supernova explosions 50 Spitzer Space Telescope 50 Jupiter moons 50 planets orbiting 50 COROT 50 globular cluster 50 galaxy 50 galaxy formation 49 astrophysical 49 Gamma ray bursts 49 planet orbits 49 planet orbiting 49 Andromeda galaxy 49 Monthly Notices 49 accretion disk 48 galactic 48 distant galaxy 48 elliptical galaxies 48 Kuiper belt 48 orbiting 48 planets 48 X ray emission 48 astronomical objects 48 Orion Nebula 47 planetary 47 brown dwarfs 47 rocky planets 47 microlensing 47 ionized gas 47 spiral galaxy 47 NASA Cassini spacecraft 47 Saturn moon Enceladus 47 super Earths 47 XMM Newton 47 extrasolar planet 46 extrasolar planets 46 moon Charon 46 exoplanet 46 Eta Carinae 46 celestial object 46 Saturn moon 46 moon Titan 46 globular clusters 46 Andromeda Galaxy 46 habitable planets 46 NASA ESA Hubble 45 nebula 45 galaxies 45 neutron star 45 Fomalhaut 45 spiral galaxies 45 gamma ray burst 45 terrestrial planets 45 supernovae 45 accreting 45 interstellar dust 45 magnetar 45 exoplanets 45 Cancri 45 galaxy cluster 45 Milky Way galaxy 45 infrared telescope 45 astronomers 45 Large Magellanic Cloud 44 supernova remnant 44 dwarf galaxies 44 ringed planet 44 constellation Orion 44 EPOXI 44 Gliese #g 44 astrophysicists 44 GRBs 44 comet 44 distant galaxies 44 celestial objects 44 Milky Way Galaxy 44 orbits 44 auroral 44 galaxy clusters 44 quasar 44 cometary 44 gravitationally 44 cosmic dust 44 WM Keck Observatory 44 asteroid 43 hot Jupiters 43 meteoroids 43 Saturn moons 43 X ray Observatory 43 Jupiter Saturn Uranus 43 NASA Kepler 43 celestial 43 asteroid belt 43 Mimas 43 Crab Nebula 43 supernova 43 unaided eye