Related by context. Frequent words. (Click for all words.) 57 accretion disk 57 supernova remnant 57 galaxy cluster 56 spiral galaxies 56 quasar 56 planetary nebula 55 spiral galaxy 55 supernova explosion 55 Eta Carinae 55 Andromeda galaxy 55 comet nucleus 55 X ray emission 54 Large Magellanic Cloud 54 Fomalhaut 54 quasars 54 galaxy clusters 54 galaxies 53 distant galaxies 53 distant galaxy 53 dwarf galaxy 53 visible wavelengths 53 rocky planets 53 Milky Way galaxy 52 globular clusters 52 Orion Nebula 52 planet orbits 52 Cancri 52 elliptical galaxies 52 infrared wavelengths 52 observable universe 51 solar nebula 51 nebula 51 accreting 51 planet orbiting 51 gamma ray burst 51 globular cluster 51 magnetar 51 ejecta 51 brown dwarfs 51 planets circling 51 planets orbiting 51 Milky Way Galaxy 51 ionized gas 50 supernova explosions 50 GRB # 50 supermassive black hole 50 Galaxy Evolution 50 Kuiper belt 50 interstellar dust 50 neutron star 50 HD #b [002] 50 gravitationally 50 planetary nebulae 49 ringed planet 49 dwarf galaxies 49 neutron stars 49 supernova remnants 49 brown dwarf 49 supermassive black holes 49 astronomical objects 48 Gamma ray bursts 48 GRBs 48 Type Ia supernovae 48 cosmic microwave background 48 shorter wavelengths 48 galaxy 48 XMM Newton 47 Jupiter Saturn Uranus 47 constellation Orion 47 supernovas 47 supernovae 47 hydrogen atoms 47 exoplanets 47 constellation Leo 47 Betelgeuse 47 terrestrial planets 47 Crab Nebula 47 moon Charon 47 Saturn moon Enceladus 46 pulsar 46 redshift 46 Andromeda Galaxy 46 torus 46 Saturn rings 46 extrasolar planets 46 Milky Way 46 electron volts 46 pulsars 46 magnetosphere 46 Enceladus 46 Global Surveyor 46 Earth magnetosphere 46 celestial object 46 supernova 46 Iapetus 46 corona 46 GeV 45 extrasolar planet 45 interstellar medium 45 rovers Spirit 45 infrared telescope