Related by context. Frequent words. (Click for all words.) 63 supernova remnant 63 magnetar 61 supernova 60 globular cluster 59 Eta Carinae 59 X ray emission 59 supernova explosion 58 planet orbiting 58 redshift 57 galaxy clusters 57 galaxy cluster 57 supernova explosions 57 supernovae 57 ejecta 56 dwarf galaxy 56 neutron star 56 HD #b [002] 55 elliptical galaxies 55 GRBs 55 spiral galaxy 55 gamma ray burst 55 globular clusters 55 brown dwarf 54 spiral galaxies 54 supernovas 54 brown dwarfs 54 pulsars 54 quasar 54 quark gluon plasma 54 nebula 54 auroral 53 gamma ray bursts 53 Large Magellanic Cloud 53 quasars 53 X ray Observatory 53 gamma rays 53 dwarf galaxies 53 distant galaxy 52 neutrino 52 neutron stars 52 gravitational lensing 52 astronomers 52 exoplanet 52 cosmic ray 51 galaxies 51 coronal mass ejection 51 supermassive black hole 51 WIMPs 51 pulsar 51 anisotropy 50 cosmic rays 50 GRB 50 muons 50 cosmic microwave background 50 XMM Newton 50 celestial object 50 silicates 50 gravitationally 50 super Earths 50 deuterium 50 interstellar medium 50 terrestrial planets 50 meteoroid 50 Milky Way Galaxy 50 astrophysicists 49 cosmological 49 extrasolar planet 49 rocky planets 49 hydrogen atom 49 morphologies 49 exoplanets 49 Orion Nebula 49 positrons 49 planets orbiting 49 solar flares 49 NASA Chandra 49 astronomical objects 48 Earth magnetosphere 48 dynamical 48 cosmologists 48 magmatic 48 interstellar dust 48 superfluid 48 GeV 48 neutrinos 48 muon 48 gravitational wave 48 nebulae 48 nuclei 48 comet 48 spectra 47 Brownian motion 47 Saturn rings 47 meteor 47 Andromeda galaxy 47 meteoroids 47 isotopic 47 superfluidity 47 extrasolar planets 47 adenine 47 accreting