Related by context. Frequent words. (Click for all words.) 69 elliptical galaxies 69 brown dwarfs 67 quasars 67 galaxies 66 distant galaxies 66 globular clusters 65 nebulae 65 GRBs 65 galaxy clusters 64 galaxy cluster 64 X ray emission 64 brown dwarf 64 rocky planets 64 spiral galaxies 63 redshift 63 magnetar 63 distant galaxy 63 neutron stars 63 supernovae 63 Orion Nebula 62 supernova explosions 62 Milky Way Galaxy 62 quasar 62 super Earths 61 celestial objects 61 HD #b [002] 61 gamma ray bursts 60 supernovas 60 dwarf galaxy 60 Eta Carinae 60 extrasolar planets 60 pulsars 60 exoplanets 60 supernova remnant 60 infrared wavelengths 60 optical telescopes 60 supernova explosion 59 nebula 59 planets 59 unaided eye 59 Andromeda Galaxy 59 Milky Way galaxy 59 terrestrial planets 59 hot Jupiters 59 XMM Newton 58 planets orbiting 58 gravitational waves 58 dwarf galaxies 58 gamma ray burst 58 galaxy 58 neutron star 58 astrophysical 57 cosmic microwave background 57 ejecta 57 extrasolar planet 57 cosmologists 57 Saturn rings 57 supermassive black holes 57 spacetime 56 Betelgeuse 56 spiral galaxy 56 orbits 56 COROT 56 planet orbiting 56 interferometry 56 wavelengths 56 exoplanet 56 celestial bodies 56 quark gluon plasma 55 supernova 55 Enceladus 55 substorms 55 gamma rays 55 silicates 55 astronomers 55 accreting 55 gravitational lensing 55 Milky Way 55 sunspots 55 cosmic rays 55 comet nucleus 54 interstellar dust 54 muons 54 nuclei 54 spectra 54 electron volts 54 Very Large Telescope 54 supermassive black hole 54 anisotropy 54 auroras 54 general relativity 54 spectroscopic 54 dynamical 54 Large Magellanic Cloud 54 luminosity 54 cosmological 54 X ray Observatory 53 particle accelerators 53 magnetic fields 53 Sedna 53 torus