Related by context. Frequent words. (Click for all words.) 68 planet orbits 66 Andromeda galaxy 66 supernova explosion 65 HD #b [002] 65 planets 65 magnetar 65 distant galaxy 63 X ray emission 63 planets orbiting 63 Kuiper belt 63 Eta Carinae 62 planet orbiting 62 extrasolar planets 62 terrestrial planets 62 Orion Nebula 62 orbits 62 Jupiter moons 62 Milky Way Galaxy 61 planetary 61 brown dwarf 61 interplanetary spacecraft 61 rocky planets 61 nebulae 61 dwarf galaxy 61 Andromeda Galaxy 60 Cancri 60 Earth magnetosphere 60 outer planets 60 orbiting 60 galaxy cluster 60 planetoid 60 magnetosphere 60 Large Magellanic Cloud 60 extrasolar planet 60 habitable planets 60 Jupiter Saturn 59 Sedna 59 neutron star 59 COROT 59 supernova remnant 59 ejecta 59 super Earths 59 auroral 59 globular cluster 59 Milky Way galaxy 59 ecliptic 59 moon Charon 59 nebula 59 constellation Perseus 59 hot Jupiters 58 brown dwarfs 58 Solar System 58 elliptical galaxies 58 meteoroids 58 Fomalhaut 58 galaxy 58 gravitationally 58 comet 58 Voyager spacecraft 58 unaided eye 58 supernova explosions 58 Gamma ray bursts 58 celestial bodies 58 habitable planet 58 Uranus 58 XMM Newton 58 globular clusters 58 ringed planet 58 Gliese #g 58 microlensing 58 supernova 57 Venusian 57 Crab Nebula 57 Iapetus 57 GRBs 57 accretion disk 57 galaxy formation 57 comet nucleus 57 exoplanets 57 moons 57 martian 57 Saturn moons 57 Saturn rings 57 coronal mass ejection 57 dwarf galaxies 57 meteoroid 57 ionized gas 57 exoplanet 57 Milky Way 57 celestial object 57 volcanically active 57 gravitational lensing 57 quasar 57 astronomers 57 Jupiter Saturn Uranus 56 supermassive black hole 56 quasars 56 spiral galaxy 56 Alpha Centauri 56 cosmic ray 56 substorms