Related by context. Frequent words. (Click for all words.) 68 brown dwarfs 67 elliptical galaxies 67 globular clusters 66 brown dwarf 66 GRBs 66 rocky planets 66 neutron star 66 distant galaxy 65 galaxies 65 galaxy cluster 64 dwarf galaxies 63 spiral galaxies 63 galaxy clusters 63 quasars 63 neutron stars 63 planets 62 supernova explosion 62 supermassive black holes 62 supermassive black hole 62 nebula 62 quasar 62 supernovae 61 Milky Way galaxy 61 planet orbiting 61 Milky Way Galaxy 61 Milky Way 60 planets orbiting 60 HD #b [002] 60 terrestrial planets 60 spiral galaxy 59 ejecta 59 unaided eye 59 galaxy 58 extrasolar planets 58 supernova 58 orbits 58 nebulae 57 exoplanet 57 supernovas 57 gamma ray burst 57 pulsars 57 distant galaxies 57 pulsar 57 interstellar dust 57 exoplanets 57 interstellar medium 57 redshift 56 orbiting 56 dwarf planets 56 silicates 56 fainter 56 positrons 55 gamma ray bursts 55 astronomers 55 olivine 55 UB# [003] 55 Sedna 54 comets 54 nuclei 54 asteroids 54 Saturn rings 54 atomic nuclei 54 gamma rays 54 Jupiter Saturn Uranus 54 extrasolar planet 54 astrophysicists 54 Betelgeuse 54 atoms 54 neutrino 53 Saturn moons 53 Kuiper Belt 53 spacetime 53 superfluid 53 gravitational waves 53 Spitzer Space Telescope 52 optical telescopes 52 celestial bodies 52 occultation 52 hydrogen atoms 52 asteroid 52 gravitational lensing 52 asteroid belt 52 Pleiades 52 comet 52 subatomic particles 52 binary 51 XMM Newton 51 X ray Observatory 51 cosmic dust 51 suns 51 Gliese 51 clumped together 51 magnetosphere 51 organic molecules 51 Galaxies 50 astrophysical 50 habitable zone 50 neutrons 50 Enceladus 50 dynamical 50 particles