Related by context. Frequent words. (Click for all words.) 67 supernova explosion 66 Eta Carinae 65 elliptical galaxies 64 planet orbiting 63 extrasolar planet 63 rocky planets 63 planets 62 Milky Way galaxy 61 Milky Way Galaxy 61 brown dwarfs 61 supernova 61 planets orbiting 61 distant galaxy 61 globular clusters 60 Orion Nebula 60 terrestrial planets 60 galaxies 60 supernovae 59 HD #b [002] 59 brown dwarf 59 GRBs 59 extrasolar planets 58 exoplanets 58 distant galaxies 58 neutron star 58 dwarf galaxies 58 galaxy 58 gamma ray burst 58 supernovas 57 Milky Way 57 galaxy clusters 57 pulsar 57 nebula 57 comet nucleus 57 supermassive black holes 56 nebulae 56 supermassive black hole 56 quasar 56 quasars 56 spiral galaxies 56 Saturn rings 56 exoplanet 56 comet 56 comets 55 Saturn moons 55 ringed planet 55 astronomers 55 neutron stars 55 ejecta 54 cosmic microwave background 54 gamma ray bursts 54 outer planets 54 organic molecules 54 spiral galaxy 54 cometary 54 galaxy cluster 53 unaided eye 53 heliosphere 53 pulsars 53 interstellar medium 53 interstellar dust 53 gamma rays 52 Betelgeuse 52 orbiting 52 magnetosphere 52 asteroid 52 XMM Newton 52 galactic 51 Spitzer Space Telescope 51 astrophysical 51 Astronomers 51 cosmologists 51 Enceladus 51 cosmic ray 51 Sedna 51 neutrino 51 NASA Cassini spacecraft 51 Kuiper Belt 51 astrophysicists 51 sunspot 51 planetary 51 corona 50 optical telescopes 50 cosmic rays 50 infrared wavelengths 50 gravitational lensing 50 asteroids 50 gravitational waves 50 celestial objects 50 solar flares 50 moon Europa 50 moons 50 planet 50 positrons 50 silicates 49 superfluid 49 X ray Observatory 49 Saturn moon 49 moon Titan 49 atomic nuclei 49 orbits