Related by context. Frequent words. (Click for all words.) 69 Andromeda galaxy 68 distant galaxy 67 galaxy cluster 66 Milky Way Galaxy 66 spiral galaxy 66 supernova remnant 66 globular cluster 65 dwarf galaxy 65 Andromeda Galaxy 64 magnetar 64 HD #b [002] 63 supernova explosion 63 Eta Carinae 62 planet orbiting 62 quasar 62 neutron star 62 Milky Way galaxy 62 Orion Nebula 61 globular clusters 61 Large Magellanic Cloud 61 X ray emission 61 planets orbiting 61 elliptical galaxies 61 GRBs 60 brown dwarf 60 distant galaxies 60 galaxies 60 nebula 60 galaxy 59 spiral galaxies 59 supermassive black hole 59 gamma ray burst 59 torus 59 constellation Leo 59 quasars 59 comet nucleus 59 X ray Observatory 59 galaxy clusters 58 ejecta 58 Milky Way 58 redshift 58 XMM Newton 58 brown dwarfs 58 meteoroids 58 nebulae 58 spacetime 57 pulsar 57 unaided eye 57 dwarf galaxies 57 celestial object 57 supernova explosions 57 extrasolar planet 57 supernova 57 accreting 56 orbiting 56 supernovae 56 rocky planets 56 gravitationally 56 Betelgeuse 56 exoplanet 56 orbits 56 gravitational lensing 56 optical telescopes 56 meteoroid 56 neutron stars 55 gamma ray bursts 55 gravitational waves 55 COROT 55 exoplanets 55 Gliese 55 GeV 55 supernovas 55 planets 55 extrasolar planets 55 cosmic microwave background 54 astronomers 54 supermassive black holes 54 Sedna 54 galactic 54 ringed planet 54 super Earths 54 WM Keck Observatory 54 Earth magnetosphere 54 asteroids 53 NASA Chandra 53 fainter 53 auroral 53 pulsars 53 interstellar dust 53 astrophysical 53 interferometry 53 gamma rays 53 gravitational wave 53 comet 53 interstellar medium 53 coronal mass ejection 53 Saturn moons 53 asteroid 53 astronomical objects 52 cosmic rays 52 corona