Related by context. Frequent words. (Click for all words.) 68 extrasolar planet 68 HD #b [002] 66 distant galaxy 66 planet orbiting 64 magnetar 63 super Earths 63 Eta Carinae 63 exoplanet 63 COROT 62 brown dwarfs 62 rocky planets 62 brown dwarf 61 Gliese 61 planets orbiting 61 exoplanets 61 extrasolar planets 60 quasar 60 planet 59 planets 59 Sedna 59 asteroid 59 terrestrial planets 59 supernova explosion 58 GRBs 58 Andromeda Galaxy 58 gamma ray burst 58 galaxy cluster 58 Jupiter moons 58 comet 57 orbiting 57 globular cluster 57 Orion Nebula 57 Saturn moon 57 neutron star 57 gravitational wave 57 Betelgeuse 56 UB# [003] 56 galaxy 56 moon Europa 56 comet nucleus 56 elliptical galaxies 55 Martian 55 Milky Way Galaxy 55 dwarf galaxy 55 martian 55 supernova 55 habitable zone 55 planetary 55 X ray emission 55 unaided eye 55 Enceladus 55 XMM Newton 55 Saturn moons 55 ringed planet 55 Large Magellanic Cloud 55 earths 55 geologically active 55 Cassini Huygens 55 Alpha Centauri 55 hot Jupiters 54 ejecta 54 dwarf planet 54 Saturn moon Enceladus 54 orbits 54 astronomers 54 pulsar 54 Milky Way galaxy 54 Milky Way 53 pulsars 53 Red Planet 53 supermoon 53 galactic 53 NASA Kepler 53 galaxies 53 cosmic ray 53 gravitationally 53 globular clusters 53 astrobiologists 53 fainter 53 perigee 53 equatorial regions 53 distant galaxies 53 cometary 53 supernova explosions 53 Einstein theory 53 Geminids 53 moon Titan 53 Mars 53 gamma ray bursts 53 infrared telescope 53 meteoroids 53 dwarf galaxies 52 Saturn rings 52 spiral galaxy 52 neutrino 52 redshift 52 Uranus 52 extraterrestrial 52 Spitzer Space Telescope 52 Earths 52 supernova remnant