Related by context. Frequent words. (Click for all words.) 70 super Earths 68 planets orbiting 64 exoplanets 64 rocky planets 64 habitable planets 63 planet orbiting 63 HD #b [002] 63 extrasolar planet 63 extrasolar planets 63 planets 62 distant galaxy 62 Milky Way Galaxy 61 Andromeda galaxy 60 NASA Kepler 60 COROT 60 Orion Nebula 60 brown dwarfs 60 terrestrial planets 59 astronomical objects 59 Kuiper belt 58 Jupiter moons 58 habitable planet 58 globular clusters 58 exoplanet 58 Saturn moons 58 elliptical galaxies 58 Earth asteroids 58 Andromeda Galaxy 58 dwarf galaxies 58 Spitzer Space Telescope 58 Eta Carinae 58 globular cluster 57 GRBs 57 ringed planet 57 distant galaxies 56 optical telescopes 56 XMM Newton 56 moon Europa 56 infrared wavelengths 56 astronomers 56 galaxy cluster 56 nebulae 55 unaided eye 55 brown dwarf 55 Large Magellanic Cloud 55 spiral galaxies 55 celestial objects 55 Milky Way 55 supernova explosion 55 Milky Way galaxy 55 moons 55 redshift 55 orbits 55 equatorial regions 54 pulsars 54 supernovas 54 magnetar 54 asteroids 54 Saturn moon 54 dwarf planets 54 Earths 54 orbiting 54 hot Jupiters 54 infrared telescope 54 dwarf galaxy 54 supernova 54 supernovae 54 Betelgeuse 53 outer planets 53 Gliese 53 constellation Perseus 53 gamma ray bursts 53 Astronomers 53 Kuiper Belt 53 galaxies 53 Geminids 53 galaxy 53 X ray emission 53 neutron star 53 WIMPs 53 astrophysicists 52 supernova remnant 52 asteroid 52 comet 52 Saturn rings 52 Very Large Telescope 52 OGLE 52 celestial object 52 Sedna 52 Opportunity rover 52 astronomical observations 52 NASA Cassini spacecraft 52 telescopes 52 WM Keck Observatory 52 constellation Leo 52 X ray Observatory 52 nebula 52 gamma ray burst 51 supernova explosions 51 geologically active 51 NASA Chandra