Related by context. Frequent words. (Click for all words.) 57 Orion Nebula 56 supernova remnant 56 nebula 55 distant galaxy 54 supernova explosion 54 nebulae 54 magnetar 54 supernova explosions 54 extrasolar planet 53 Spitzer Space Telescope 53 Crab Nebula 53 HD #b [002] 52 Large Magellanic Cloud 52 brown dwarf 52 accretion disk 51 brown dwarfs 51 interstellar dust 51 distant galaxies 51 galaxies 51 elliptical galaxies 51 planet orbits 51 dwarf galaxy 51 spiral galaxy 51 supernova 51 galaxy cluster 50 ejecta 50 NGC 50 ionized gas 50 spiral galaxies 50 quasar 50 cosmic dust 50 globular cluster 50 globular clusters 50 celestial object 50 planet orbiting 50 quasars 50 infrared telescope 49 galaxy formation 49 Saturn moon 49 Fomalhaut 48 Eta Carinae 48 accreting 48 galaxy 48 nuclei 48 comet 48 comet nucleus 48 X ray emission 48 Bose Einstein condensate 48 gravitationally 47 neutron stars 47 neutron star 47 pulsar 47 planets 47 Gliese #g 47 rocky planets 47 Milky Way galaxy 47 gamma rays 47 quark gluon plasma 47 Iapetus 47 X ray Observatory 47 gamma ray burst 47 corona 47 supernovae 47 yellowish 47 hot Jupiters 47 Milky Way Galaxy 47 starbursts 47 Andromeda galaxy 46 blobs 46 Kuiper belt 46 galaxy clusters 46 dwarf galaxies 46 supermassive black hole 46 COROT 46 Jupiter moons 46 cosmic microwave background 46 supernovas 46 planets orbiting 46 neutrino 46 orbiting 46 super Earths 46 extrasolar planets 46 redshift 46 XMM Newton 46 ringed planet 46 radioactive decay 46 interstellar medium 46 outer planets 45 cosmic rays 45 muons 45 Milky Way 45 subatomic particle 45 unaided eye 45 infrared wavelengths 45 astronomers 45 Saturn rings 45 cometary 45 exoplanets 45 astrophysicists 45 Astronomers 45 deuterium