Related by context. Frequent words. (Click for all words.) 60 magnetar 59 ionized gas 59 supernova explosion 59 accretion disk 59 dwarf galaxy 57 neutron star 57 supernova remnant 57 planet orbits 57 planetary nebula 57 X ray emission 57 accreting 56 active galactic nuclei 56 pulsar 56 Eta Carinae 55 supernova explosions 55 globular cluster 54 gravitational attraction 54 observable universe 54 interstellar medium 54 supernova 54 planetary nebulae 54 supernova remnants 53 Crab Nebula 53 Andromeda galaxy 53 Kuiper belt 53 quasar 53 gravitationally 52 supermassive black hole 52 Saturn moon Enceladus 52 supermassive black holes 52 Pulsars 52 galaxy cluster 52 nebula 52 galaxy clusters 52 distant galaxy 51 nebulae 51 brown dwarf 51 galaxy formation 51 gamma ray burst 51 pyroclastic flow 51 gravitational tug 51 Milky Way Galaxy 51 star Gliese 51 Betelgeuse 51 Gamma ray bursts 51 rocky planets 51 Gliese #g 51 ionize 51 atomic nuclei 51 HD #b [002] 50 planet orbiting 50 ejecta 50 Type Ia supernovae 50 Phaethon 50 celestial object 50 constellation Perseus 50 ionised 50 lithosphere 50 galaxy 49 GRB # 49 colliding galaxies 49 solar nebula 49 supernovae 49 heliosheath 49 solar corona 49 interstellar dust 49 Cancri 49 outer layers 49 outer crust 49 planetoid 49 Opportunity rover 49 magnetosphere 49 X ray Observatory 49 supernovas 48 galaxies 48 supergiant 48 Galaxy Evolution 48 infrared telescope 48 Cabeus crater 48 neutron stars 48 pulsars 48 Large Magellanic Cloud 48 spiral galaxy 48 planets circling 48 silicates 48 globular clusters 48 radioactive decay 48 coronal mass ejection 48 gravitational pull 47 hot Jupiters 47 Astrophysicists 47 constellation Orion 47 torus 47 muons 47 brown dwarfs 47 Orion Nebula 47 meteoroids 47 comet nucleus 47 Milky Way galaxy 47 terrestrial planets 47 spacetime