Related by context. Frequent words. (Click for all words.) 63 planet orbits 60 HD #b [002] 57 Gliese #g 56 habitable planet 56 planet orbiting 55 constellation Perseus 55 perigee 55 constellation Leo 54 unaided eye 54 orbits 54 gravitational tug 54 circular orbit 53 terrestrial planets 53 Betelgeuse 53 elliptical orbit 52 Eta Carinae 52 brown dwarf 52 habitable zone 52 Gliese 52 habitable planets 51 extrasolar planet 51 rocky planets 51 elliptical galaxies 51 distant galaxy 51 spiral galaxy 50 Andromeda galaxy 50 COROT 50 super Earths 50 Fomalhaut 50 Crab Nebula 50 Sedna 50 celestial object 50 Andromeda Galaxy 50 galaxy cluster 50 ecliptic 49 Jupiter Saturn Uranus 49 X ray emission 49 sunspot cycle 49 hot Jupiters 49 moon Charon 49 planets 48 Uranus 48 orbiting 48 equator 48 quasar 48 GRBs 48 brown dwarfs 48 planets orbiting 48 accretion disk 48 Geminids 48 geologically active 48 redshift 47 supernova explosion 47 shorter wavelength 47 Kuiper belt 47 ionized gas 47 fainter 47 globular cluster 47 Milky Way galaxy 47 gravitationally 47 WIMPs 47 Iapetus 47 magnetar 47 Milky Way Galaxy 47 Mimas 46 magnetosphere 46 extrasolar planets 46 equinoxes 46 infrared wavelengths 46 UB# [003] 46 umbra 46 exoplanets 46 substorms 46 dwarf galaxy 46 neutron star 46 mid latitudes 46 exoplanet 46 supermoon 46 Orion Nebula 46 planetary 45 Large Magellanic Cloud 45 gravitational pull 45 gamma ray burst 45 polar caps 45 celestial objects 45 supermassive black hole 45 equinox 45 Leonids 45 occultation 45 Perseids 45 spiral galaxies 44 meteoroids 44 celestial bodies 44 equatorial regions 44 heliosphere 44 suns 44 geomagnetic field 44 pulsar 44 galaxy 44 Pleiades 44 planet