Related by context. Frequent words. (Click for all words.) 63 supernova explosion 62 Eta Carinae 60 GRBs 60 ejecta 60 elliptical galaxies 60 X ray emission 59 magnetar 59 globular clusters 58 Saturn rings 58 spiral galaxies 58 rocky planets 58 supernova remnant 58 brown dwarfs 57 dwarf galaxies 57 dwarf galaxy 57 distant galaxy 57 galaxy cluster 56 planet orbiting 56 supernova 56 spiral galaxy 56 HD #b [002] 56 nebula 56 interstellar medium 56 supernovas 56 supernova explosions 56 supermassive black hole 56 gravitationally 56 silicates 55 neutron stars 55 Einstein theory 55 brown dwarf 55 Saturn moons 55 Orion Nebula 55 quasar 55 Large Magellanic Cloud 55 terrestrial planets 55 cosmic microwave background 55 cosmological 55 Milky Way Galaxy 55 galaxies 55 astronomers 55 torus 54 planets orbiting 54 redshift 54 supermassive black holes 54 spacetime 54 interstellar dust 54 comet nucleus 54 galaxy clusters 54 XMM Newton 54 quasars 54 quark gluon plasma 54 neutron star 54 astrophysical 54 planets 53 hot Jupiters 53 nebulae 53 magnetosphere 53 Iapetus 53 supernovae 53 gravitational wave 53 Milky Way galaxy 53 Enceladus 53 cosmological constant 53 WMAP 53 super Earths 53 general relativity 53 quantum theory 53 gravitational lensing 53 pulsars 52 X ray Observatory 52 distant galaxies 52 pulsar 52 astrophysicists 52 comet 52 gamma ray burst 52 olivine 52 occultation 52 extrasolar planets 52 exoplanet 52 Cassini imaging 52 Andromeda Galaxy 52 spectroscopic 52 subatomic 52 cosmologists 51 celestial bodies 51 organic molecules 51 neutrino 51 atomic nuclei 51 muons 51 gamma ray bursts 51 quantum gravity 51 comets 51 Uranus 51 superfluid 51 chemical composition 51 Milky Way 51 galaxy 51 cosmic ray 51 dynamical 50 planetary