Related by context. Frequent words. (Click for all words.) 42 X ray emission 41 Eta Carinae 40 supernova 39 supernova explosion 39 Large Magellanic Cloud 38 Sunspot 38 Arcturus 38 Orion Nebula 37 Deneb 37 supernova explosions 37 NGC 36 nebula 36 nebulae 36 brown dwarfs 36 dwarf galaxy 36 quasar 35 supernovae 35 gamma ray burst 35 Scorpius 35 HD #b [002] 35 elliptical galaxies 35 spiral galaxies 35 GRBs 35 brown dwarf 34 globular clusters 34 luminosity 34 GRB 34 Sedna 34 XMM Newton 34 quasars 34 Andromeda 34 planet orbiting 34 corona 33 Betelgeuse 33 ejecta 33 aurora 33 equatorial 33 supernovas 33 galaxy cluster 32 starburst 32 Io 32 exoplanet 32 gamma ray bursts 32 neutron star 32 gamma ray 32 pulsars 32 terrestrial planets 32 Galaxies 31 sunspot 31 Milky Way 31 Milky Way Galaxy 31 spectra 31 gamma rays 31 Cassiopeia 31 Jupiters 31 perigee 31 bluish 30 redshift 30 galaxies 30 dwarf galaxies 30 unaided eye 30 Gliese 30 neutron stars 30 spiral galaxy 30 Pollux 30 supermassive black hole 30 Enceladus 30 spectroscopic 29 Uranus 29 meteor shower 29 galaxy 29 photometric 29 planets orbiting 29 extrasolar planets 29 extrasolar planet 29 ESO Very Large Telescope 29 interstellar medium 29 distant galaxy 29 spacetime 29 Iapetus 28 gravitationally 28 Saturn rings 28 AGN 28 interferometer 28 NASA Chandra 28 accreting 28 galaxy clusters 28 Aldebaran 28 Neptune 28 chargeability anomaly 28 starlight 28 Pleiades 28 Very Large Telescope 28 Spitzer Space Telescope 28 ringed planet 27 Nebula 27 Sagittarius 27 Kuiper Belt 27 cosmic ray 27 ESO 27 occultation