Related by context. Frequent words. (Click for all words.) 66 Gliese 65 HD #b [002] 61 brown dwarf 61 extrasolar planet 60 XMM Newton 59 exoplanet 59 planet orbiting 59 brown dwarfs 59 exoplanets 58 redshift 58 comet Wild 57 orbits 57 planets orbiting 57 extrasolar planets 57 Eta Carinae 57 galaxy cluster 56 gamma ray burst 56 Kepler 55 distant galaxy 55 globular clusters 54 quasar 54 rocky planets 54 planets 53 Betelgeuse 53 X ray emission 53 astronomers 53 GRBs 53 super Earths 53 Lutetia 53 terrestrial planets 53 occultation 53 supernovae 53 Geminids 53 gravitational wave 52 supernova remnant 52 supernova explosion 52 pulsar 52 Enceladus 52 Milky Way Galaxy 52 supernova 52 Large Magellanic Cloud 52 quasars 52 gamma ray bursts 52 Orion Nebula 52 dwarf galaxy 52 UB# [003] 52 Corot 52 asteroid 52 orbiting 51 Uranus 51 ejecta 51 Astrophysical Journal Letters 51 Spitzer Space Telescope 51 pulsars 51 astrophysicists 51 unaided eye 51 comet 51 neutron star 51 Cassini Huygens 51 perigee 51 dynamical 51 Very Large Telescope 50 Astronomers 50 habitable zone 50 hot Jupiters 50 orbited 50 Astrophysical Journal 50 STEREO 50 neutrino 50 Saturn rings 50 GOCE 50 astronomical observations 50 ecliptic 50 Sensing Satellite 50 interstellar dust 50 sunspot 50 optical telescopes 50 LCROSS 50 Sedna 50 galaxies 50 orbital 50 distant galaxies 50 Saturn moon 50 accreting 50 celestial objects 49 Cassini spacecraft 49 anisotropy 49 Cassini 49 cometary 49 galaxy clusters 49 comet nucleus 49 NASA Cassini spacecraft 49 interstellar medium 49 Comet Tempel 1 49 galaxy 49 Solar System 49 JWST 49 Envisat 49 ESO Very Large Telescope 49 supermassive black hole 49 planetary