Related by context. Frequent words. (Click for all words.) 67 magnetar 65 Eta Carinae 64 supernova explosion 63 planetary nebula 63 X ray emission 62 Crab Nebula 62 planetary nebulae 62 distant galaxy 62 ionized gas 62 ejecta 62 GRB # 61 Type Ia supernovae 61 accretion disk 61 supernova remnant 61 supernova 60 dwarf galaxy 60 solar nebula 60 solar corona 60 supernova explosions 59 Gamma ray bursts 59 visible wavelengths 59 interstellar dust 59 HD #b [002] 59 galaxy cluster 59 quasars 58 Large Magellanic Cloud 58 supernova remnants 58 nebula 58 gamma ray burst 57 planet orbits 57 quasar 57 Orion Nebula 57 shorter wavelengths 56 Phaethon 56 GRBs 56 supermassive black hole 56 magnetic reconnection 56 Milky Way Galaxy 56 neutron star 56 phosphorescence 56 Andromeda galaxy 56 globular clusters 55 elliptical galaxies 55 observable universe 55 Hubble observations 55 globular cluster 55 gamma rays 55 Gliese #g 55 muons 55 auroral 55 corona 55 XMM Newton 55 Cancri 55 Fomalhaut 55 redshift 54 spiral galaxies 54 planet orbiting 54 Halley comet 54 meteoroids 54 Kuiper belt 54 nebulae 54 brown dwarf 54 neutrino 54 supernovae 54 quark gluon plasma 54 comet 54 supernovas 53 galaxy clusters 53 starbursts 53 super Earths 53 Earth magnetosphere 53 coronal mass ejection 53 cosmic microwave background 53 Spitzer Space Telescope 53 extrasolar planet 53 infrared wavelengths 53 Iapetus 53 comet nucleus 53 Saturn moon Enceladus 53 volcanically active 53 substorms 53 subatomic particle 53 planetoid 53 gravitationally 53 luminosity 53 Galaxy Evolution 53 frequency comb 52 celestial object 52 galaxies 52 planets orbiting 52 cosmic ray 52 positrons 52 ringed planet 52 reddish hue 52 brown dwarfs 52 constellation Perseus 52 gamma ray 52 distant galaxies 52 meteoroid 52 interstellar medium 52 lavas