Related by context. Frequent words. (Click for all words.) 68 X ray emission 67 ionized gas 66 supernova explosion 66 ejecta 66 dwarf galaxy 65 interstellar medium 65 gravitationally 65 galaxy cluster 64 GeV 64 neutron star 64 magnetosphere 64 magnetar 64 galaxy clusters 64 lithosphere 63 outer layers 63 torus 63 supernova explosions 63 vortices 63 spiral galaxies 63 Earth magnetosphere 62 filaments 62 globular cluster 62 spiral galaxy 62 dwarf galaxies 61 nuclei 61 spacetime 61 Andromeda galaxy 61 Eta Carinae 61 accreting 61 Milky Way Galaxy 61 nebula 61 galaxy 61 quasar 61 interstellar dust 60 distant galaxy 60 supernova remnant 60 atomic nuclei 60 galaxies 60 Saturn rings 60 gravitational tug 60 elliptical galaxies 60 globular clusters 60 magnetic fields 60 orbits 60 supermassive black hole 59 meteoroids 59 Iapetus 59 muons 59 filament 59 hydrogen atoms 59 neutron stars 59 Milky Way galaxy 59 crystal lattice 59 Andromeda Galaxy 59 magnetization 59 gravitational 59 comet nucleus 58 interstellar space 58 meteoroid 58 atoms 58 Milky Way 58 comet 58 convective 57 superfluid 57 radioactive decay 57 angular momentum 57 silicates 57 hot Jupiters 57 HD #b [002] 57 supermassive black holes 57 nebulae 57 volcanic plume 57 GRBs 57 pulsar 57 distant galaxies 57 ecliptic 57 heliosphere 57 auroral 57 aerosol particles 57 neutrons 57 crustal 56 rocky planets 56 planet orbiting 56 gamma rays 56 phonons 56 anisotropy 56 redshift 56 cosmic rays 56 corona 56 supernova 56 cosmic ray 56 terrestrial planets 56 troposphere 56 velocities 56 WIMPs 56 positrons 56 supernovae 56 particles 56 electron beams 56 radiative 55 Saturn moon Enceladus