Related by context. Frequent words. (Click for all words.) 63 ejecta 63 Kuiper belt 62 supernova explosion 60 terrestrial planets 60 rocky planets 59 meteoroids 59 elliptical galaxies 59 asteroid 58 planets 58 silicates 58 globular cluster 58 extrasolar planet 58 X ray emission 58 comet nucleus 58 planet orbits 57 Eta Carinae 57 martian 57 Saturn rings 57 planetary 57 accretion disk 57 magnetar 57 cometary 57 meteoroid 57 asteroids 56 interstellar dust 56 habitable planets 56 supernova remnant 56 galaxy formation 56 comet 56 accreting 56 globular clusters 56 HD #b [002] 56 interstellar medium 55 Fomalhaut 55 brown dwarf 55 supernova explosions 55 Milky Way Galaxy 55 outer planets 55 habitable planet 55 Meridiani 55 spiral galaxies 55 planet orbiting 55 lavas 55 ionized gas 55 Crab Nebula 55 dwarf galaxies 55 Earth magnetosphere 55 Gliese #g 55 comets 55 galaxy cluster 55 dwarf galaxy 55 olivine 55 regolith 55 nebula 55 brown dwarfs 54 radioactive decay 54 planets orbiting 54 distant galaxy 54 radiative 54 Saturn moons 54 anisotropy 54 lithosphere 54 supernova 54 galaxies 54 oxygen isotopes 54 astrophysical 54 igneous 54 GRBs 54 Enceladus 54 extrasolar planets 54 subatomic particle 54 Saturn moon Enceladus 54 distant galaxies 53 morphologies 53 spectroscopic 53 Andromeda galaxy 53 Martian surface 53 exoplanet 53 silicate 53 cosmic microwave background 53 dynamical 53 aerosol particles 53 neutron star 53 magnetosphere 53 Milky Way galaxy 53 heliosphere 53 basaltic 53 Saturn moon 53 celestial object 53 orbits 53 moons 53 gravitational lensing 53 earths 53 galaxy 52 COROT 52 quark gluon plasma 52 Iapetus 52 exoplanets 52 Jupiter moons 52 martian surface 52 Solar System