Related by context. Frequent words. (Click for all words.) 72 globular clusters 70 galaxies 69 dwarf galaxies 69 spiral galaxies 69 GRBs 69 brown dwarfs 69 rocky planets 68 supernovae 67 nebulae 67 elliptical galaxies 67 terrestrial planets 66 Milky Way Galaxy 66 quasars 66 galaxy clusters 66 supernova explosion 66 planets 65 distant galaxy 65 nebula 65 distant galaxies 64 neutron stars 64 Milky Way galaxy 64 neutron star 64 supernovas 64 extrasolar planets 63 quasar 63 interstellar dust 63 ejecta 63 interstellar medium 63 supermassive black holes 63 galaxy 62 comets 62 galaxy cluster 62 XMM Newton 62 pulsars 62 planets orbiting 61 brown dwarf 61 redshift 61 HD #b [002] 61 exoplanets 61 silicates 60 Milky Way 60 supermassive black hole 60 gamma ray burst 60 gamma ray bursts 60 supernova 60 exoplanet 59 planet orbiting 59 spiral galaxy 59 Saturn rings 59 astrophysical 59 Kuiper Belt 59 cosmic microwave background 59 extrasolar planet 58 gravitational lensing 58 magnetosphere 58 comet nucleus 58 Saturn moons 58 Enceladus 58 astronomers 57 comet 57 Solar System 57 cometary 57 corona 57 organic molecules 57 abundances 57 spacetime 57 outer planets 56 infrared wavelengths 56 pulsar 56 cosmic rays 56 nuclei 56 Spitzer Space Telescope 56 Galaxies 56 Astrophysical Journal 56 Betelgeuse 55 olivine 55 optical telescopes 55 heliosphere 55 gravitational waves 55 unaided eye 55 filaments 55 astrophysicists 55 vortices 55 gamma rays 55 spectroscopic 55 X ray Observatory 55 magnetic fields 54 WMAP 54 positrons 54 celestial objects 54 dynamical 54 occultation 54 galactic 54 Sedna 54 neutrinos 54 orbits 54 Astrophysical Journal Letters 54 interferometry 54 neutrino 54 radioactive decay 53 planetary