Related by context. Frequent words. (Click for all words.) 58 distant galaxy 57 habitable planet 57 HD #b [002] 56 magnetar 56 celestial object 55 outer planets 55 habitable planets 55 planets 55 Saturn moons 55 Jupiter moons 55 Gamma ray bursts 55 subatomic particle 55 asteroid 55 observable universe 54 comet nucleus 54 COROT 54 Earth magnetosphere 54 galaxy formation 54 rocky planets 54 gamma ray burst 54 Eta Carinae 54 accretion disk 54 interplanetary spacecraft 53 extrasolar planet 53 super Earths 53 meteoroid 53 galaxy 53 supernova explosion 53 neutron star 53 Gliese #g 53 Saturn rings 53 planet orbiting 53 planetoid 53 galaxy cluster 53 dwarf galaxy 53 interstellar medium 52 exoplanet 52 solar nebula 52 brown dwarfs 52 gravitational attraction 52 spacetime 52 Andromeda galaxy 52 Milky Way Galaxy 52 comet 52 terrestrial planets 52 gamma rays 52 supernova 52 elliptical galaxies 52 Einstein theory 52 distant galaxies 52 Saturn moon 52 galaxies 52 planet 52 infrared telescope 51 heliosphere 51 XMM Newton 51 GRBs 51 quasar 51 coronal mass ejection 51 Sedna 51 astronomers 51 Milky Way galaxy 51 planet orbits 51 coronal mass ejections 51 orbiting 51 quark gluon plasma 51 planetary nebula 50 Kuiper belt 50 brown dwarf 50 astrophysical 50 planetary 50 ionized gas 50 exoplanets 50 Milky Way 50 Colaprete 50 Cassini Huygens 50 auroral 50 gravitationally 50 planets orbiting 50 hot Jupiters 50 cometary 50 galaxy clusters 50 neutrinos 50 substorms 50 van Dokkum 50 X ray emission 50 asteroids 50 galactic 50 supernova explosions 50 supernovas 50 gravitational pull 50 interstellar dust 50 WIMPs 50 Earth asteroids 49 neutrino 49 cosmic rays 49 extrasolar planets 49 Saturn moon Enceladus 49 magnetosphere 49 cosmic 49 gamma ray bursts