Related by context. Frequent words. (Click for all words.) 61 planetary nebula 61 Eta Carinae 61 Crab Nebula 60 star Gliese 60 supernova explosion 59 X ray emission 59 Fomalhaut 59 supernova remnant 59 Andromeda galaxy 59 planetary nebulae 59 magnetar 59 galaxy cluster 59 planet orbits 59 accretion disk 59 Milky Way Galaxy 58 Orion Nebula 58 Cancri 58 constellation Perseus 58 distant galaxy 57 Large Magellanic Cloud 57 Sgr 57 constellation Leo 57 active galactic nuclei 57 planet orbiting 57 globular cluster 56 gamma ray burst 56 constellation Orion 56 auroral 55 torus 55 solar nebula 55 supermassive black hole 55 z = 55 Andromeda Galaxy 55 GRB # 55 interstellar medium 55 brown dwarf 55 ionized gas 55 HD #b [002] 55 GRBs 55 solar corona 55 nebula 55 galaxy formation 55 Betelgeuse 54 celestial object 54 galaxy 54 supernova explosions 54 magnetic reconnection 54 Hubble observations 54 spiral galaxy 54 supernova remnants 54 quasar 54 Kuiper belt 53 heliosheath 53 coronal mass ejection 53 colliding galaxies 53 Saturn moon Enceladus 53 dwarf galaxy 53 Milky Way galaxy 53 planets circling 53 nuclei 53 Gamma ray bursts 53 Mimas 53 extrasolar planet 53 observable universe 53 planets orbiting 53 galaxy clusters 53 comet tail 53 globular clusters 53 ionised 53 spiral galaxies 53 XMM Newton 53 infrared wavelengths 52 Type Ia supernovae 52 visible wavelengths 52 Earth magnetosphere 52 microlensing 52 ringed planet 52 Gliese #g 52 quark gluon plasma 52 galaxies 52 nebulae 52 Spitzer Space Telescope 52 brown dwarfs 52 ejecta 52 elliptical galaxies 51 supernova 51 neutron star 51 rocky planets 51 innermost planet 51 terrestrial planets 51 NICMOS 51 Galaxy Evolution 51 habitable zones 51 Milky Way 51 supergiant 51 Hawking radiation 51 silicates 51 redshift 51 quasars 51 spectroscopic 50 super Earths