Related by context. Frequent words. (Click for all words.) 64 accretion disk 61 galaxy formation 61 supernova explosions 60 supernova explosion 59 X ray emission 59 accreting 59 ionized gas 58 magnetar 58 interstellar medium 57 Eta Carinae 57 planetary nebulae 56 neutron star 56 dwarf galaxy 55 gravitationally 55 supermassive black hole 55 interstellar dust 55 solar corona 55 ejecta 55 solar nebula 55 supernova remnants 54 observable universe 54 colliding galaxies 54 planet orbits 54 magnetic reconnection 54 outer layers 53 meteoroids 53 gravitational attraction 53 meteoroid 53 supernova 52 planetary nebula 52 lithosphere 52 gravitational waves 52 supermassive black holes 52 rocky planets 52 antiprotons 52 globular clusters 52 neutron stars 52 WIMPs 52 distant galaxies 52 cosmic rays 51 explosive eruptions 51 supernovae 51 shorter wavelengths 51 Saturn moon Enceladus 51 Earth magnetosphere 51 pulsar 51 supernovas 51 magnetosphere 51 Gamma ray bursts 51 pulsations 51 Milky Way Galaxy 51 gravitational 51 supernova remnant 51 Ultraviolet light 50 oceanic crust 50 Saturn moons 50 astrophysical 50 quasars 50 planet orbiting 50 pyroclastic flow 50 quasar 50 haloes 50 crustal 50 magnetic fields 50 cosmic radiation 50 brown dwarfs 50 distant galaxy 50 Andromeda galaxy 50 singularities 50 globular cluster 49 GRBs 49 ionizing 49 Jupiter moons 49 magma chamber 49 silicates 49 subatomic particle 49 radioactive decay 49 terrestrial planets 49 vortexes 49 aerosol particles 49 muons 49 alpha particles 49 brown dwarf 49 microlensing 49 gravitational tug 49 volcanic plume 49 convective 49 starbursts 49 spacetime 49 earth crust 49 galaxy clusters 49 electron beams 49 gravitational wave 49 elliptical galaxies 49 extrasolar planet 49 Hubble observations 49 atomic nuclei 49 gamma rays 49 planets circling 49 nebulae 49 habitable planets