Related by context. Frequent words. (Click for all words.) 66 supernova remnant 64 Crab Nebula 63 Eta Carinae 63 magnetar 63 supernovas 61 supernova explosion 60 supernova 60 distant galaxy 59 Milky Way Galaxy 59 supernovae 58 Orion Nebula 58 galaxy cluster 58 planet orbiting 58 X ray emission 58 spiral galaxy 58 supernova explosions 58 ionized gas 57 Large Magellanic Cloud 57 HD #b [002] 56 Andromeda galaxy 56 gamma ray burst 56 quasar 56 spiral galaxies 56 ringed planet 56 GRBs 56 dwarf galaxy 56 gamma rays 56 Saturn rings 56 pulsar 55 comet 55 globular cluster 55 supermassive black hole 54 galaxies 54 galaxy clusters 54 extrasolar planet 54 nebula 54 accretion disk 54 coronal mass ejection 54 galaxy 54 Milky Way galaxy 54 nebulae 54 dwarf galaxies 54 interstellar medium 54 Andromeda Galaxy 54 comet nucleus 54 globular clusters 54 pulsars 54 Earth magnetosphere 54 meteoroids 53 CMEs 53 auroral 53 distant galaxies 53 elliptical galaxies 53 planets orbiting 53 XMM Newton 53 meteoroid 53 exoplanets 53 coronal mass ejections 53 gamma ray 52 quasars 52 gamma ray bursts 52 cosmic ray 52 ejecta 52 subatomic particle 52 Saturn moon Enceladus 52 cosmic rays 52 Kuiper belt 52 torus 52 supermassive black holes 52 Milky Way 52 neutrino 52 Saturn moons 52 brown dwarf 52 particle beam 52 celestial object 51 positrons 51 neutron star 51 atomic nuclei 51 astronomical objects 51 X ray Observatory 51 extrasolar planets 51 neutron stars 51 asteroid 51 astronomers 51 Spitzer Space Telescope 51 astrophysicists 51 Fomalhaut 51 interstellar dust 50 exoplanet 50 galaxy formation 50 Very Large Array 50 corona 50 gravitationally 50 planets 50 magnetosphere 50 subatomic particles 50 auroras 50 asteroids 50 Gamma Ray 50 gravitational lensing 50 muons