Related by context. Frequent words. (Click for all words.) 65 X ray emission 64 Eta Carinae 63 GRBs 62 elliptical galaxies 62 magnetar 61 dwarf galaxy 61 supernova explosion 60 spiral galaxies 60 supernovae 60 galaxy clusters 60 Milky Way Galaxy 60 gravitationally 59 COROT 59 Andromeda Galaxy 59 neutron star 59 galaxy formation 59 galaxies 59 distant galaxy 58 celestial object 58 galaxy cluster 58 interferometry 58 globular cluster 58 dynamical 58 neutron stars 58 supernova 58 supernova explosions 57 spiral galaxy 57 spacetime 57 gamma ray burst 57 Andromeda galaxy 57 substorms 57 orbits 57 WIMPs 57 planets 57 Milky Way galaxy 57 atomic nuclei 57 planet orbiting 56 supermassive black holes 56 dwarf galaxies 56 interstellar dust 56 supermassive black hole 56 nebulae 56 Earth magnetosphere 56 gamma ray bursts 56 nebula 56 brown dwarfs 56 extrasolar planet 56 supernova remnant 56 ejecta 56 astronomers 56 Saturn rings 56 galaxy 55 ionized gas 55 XMM Newton 55 quasar 55 supernovas 55 auroral 55 pulsars 55 spectra 55 gravitational lensing 55 distant galaxies 55 globular clusters 55 interstellar medium 55 HD #b [002] 55 binary 55 exoplanets 55 pulsar 55 hot Jupiters 55 gravitational waves 55 astrophysicists 55 comet nucleus 55 astronomical observations 55 planets orbiting 55 gravitational wave 55 gamma rays 54 occultation 54 extrasolar planets 54 meteoroids 54 Milky Way 54 superfluid 54 redshift 54 Brownian motion 54 ecliptic 54 quasars 53 atomic particles 53 neutrino 53 celestial objects 53 nuclei 53 Saturn moon Enceladus 53 brown dwarf 53 Large Magellanic Cloud 53 general relativity 53 interferometer 53 optical telescopes 53 Mimas 53 muons 53 orbiting 53 gravitational tug 53 infrared wavelengths 53 rocky planets 53 Einstein theory