Related by context. Frequent words. (Click for all words.) 56 globular cluster 53 brown dwarf 53 globular clusters 50 Orion Nebula 49 supernova remnant 49 Pulsars 49 Milky Way Galaxy 49 supernova remnants 49 galaxy formation 49 accretion disk 49 magnetar 49 brown dwarfs 48 Fomalhaut 48 nebulae 48 nebula 47 planet orbits 47 terrestrial planets 47 X ray emission 47 supernova explosions 47 Eta Carinae 47 Crab Nebula 47 SDSS 47 auroral 47 elliptical galaxies 46 constellation 46 galaxy 46 redshift 46 spectroscopic 46 supernovas 46 Milky Way 46 Scorpius 46 constellation Leo 46 interstellar medium 46 accreting 45 dwarf galaxy 45 planet orbiting 45 GRBs 45 distant galaxies 45 spectra 45 constellation Orion 45 constellation Perseus 45 Deneb 45 neutron star 45 XMM Newton 45 Cancri 45 anisotropy 44 interferometry 44 celestial object 44 supernova 44 microlensing 44 quasar 44 supernovae 44 astrophysical 44 Andromeda 44 OGLE 44 ionized gas 44 ecliptic 44 supernova explosion 44 galaxies 44 Pleiades 44 pulsar 44 habitable planets 44 ejecta 44 Large Magellanic Cloud 43 dynamical 43 planets 43 Gamma ray bursts 43 Andromeda Galaxy 43 Nebula 43 spiral galaxy 43 Cassiopeia 43 dwarf galaxies 43 spiral galaxies 43 COROT 43 solar nebula 43 photometric 42 Spitzer Space Telescope 42 planets orbiting 42 supermassive black hole 42 interstellar dust 42 gamma ray bursts 42 Arcturus 42 distant galaxy 42 galactic 42 Kuiper belt 42 Betelgeuse 42 galaxy cluster 42 extrasolar planet 42 GRB 42 nuclei 42 quasars 41 gravitationally 41 Andromeda galaxy 41 Galaxies 41 HD #b [002] 41 neutrino 41 gamma ray burst 41 Mimas 41 rocky planets 41 galaxy clusters 41 extrasolar planets