Related by context. Frequent words. (Click for all words.) 73 supernova explosion 72 magnetar 72 X ray emission 71 supernova 69 supernovae 69 supernova remnant 69 gamma ray burst 69 GRBs 69 Eta Carinae 68 dwarf galaxy 66 supernovas 66 supernova explosions 65 globular clusters 64 galaxy clusters 64 gamma ray bursts 63 galaxy cluster 63 ejecta 63 neutron star 63 distant galaxy 63 brown dwarfs 63 neutron stars 63 elliptical galaxies 62 spiral galaxies 62 planet orbiting 62 quasar 62 quasars 61 redshift 61 brown dwarf 61 pulsar 61 galaxies 61 dwarf galaxies 61 supermassive black hole 60 spiral galaxy 60 HD #b [002] 60 exoplanet 59 Orion Nebula 59 Large Magellanic Cloud 59 pulsars 59 Milky Way Galaxy 59 interstellar medium 59 substorms 59 super Earths 59 quark gluon plasma 59 nebula 58 XMM Newton 58 supermassive black holes 58 nebulae 57 coronal mass ejection 57 extrasolar planet 57 rocky planets 57 cosmic ray 57 planets orbiting 57 comet nucleus 57 X ray Observatory 57 exoplanets 56 gamma rays 56 galaxy 56 NASA Chandra 56 coronal mass ejections 56 distant galaxies 56 Geminids 55 cosmic rays 55 Milky Way galaxy 55 gravitational lensing 55 spacetime 55 hot Jupiters 55 astronomers 55 extrasolar planets 55 astronomical objects 55 neutrino 55 Saturn rings 55 Earth magnetosphere 54 interferometry 54 positrons 54 solar flares 54 radioactive decay 54 infrared wavelengths 54 Andromeda Galaxy 54 Leonids 54 terrestrial planets 54 spectra 54 cosmic microwave background 53 interstellar dust 53 luminosity 53 accreting 53 cometary 53 astrophysicists 53 nuclei 53 ringed planet 53 gravitational wave 53 atomic nuclei 53 comet 53 atomic nucleus 53 occultation 53 sunspot 53 gravitationally 53 spectroscopic 53 gamma ray 52 astrophysical 52 Betelgeuse 52 GRB