Related by context. Frequent words. (Click for all words.) 70 GRBs 69 pulsars 68 supernovas 68 gamma ray bursts 67 supernovae 66 globular clusters 66 brown dwarfs 66 quasars 66 supernova explosion 65 neutron stars 65 elliptical galaxies 64 exoplanets 64 galaxies 63 gamma ray burst 63 rocky planets 63 distant galaxy 63 neutron star 63 spiral galaxies 63 extrasolar planets 63 galaxy clusters 62 HD #b [002] 62 Eta Carinae 62 planets orbiting 62 dwarf galaxies 61 terrestrial planets 61 supernova 61 quasar 61 galaxy cluster 61 astronomers 61 redshift 61 Milky Way Galaxy 61 planets 60 pulsar 60 distant galaxies 60 gravitational lensing 60 planet orbiting 59 optical telescopes 59 X ray Observatory 59 XMM Newton 58 Saturn rings 58 supermassive black holes 58 solar flares 58 brown dwarf 58 spiral galaxy 58 gravitational waves 58 comet nucleus 57 nebulae 57 ejecta 57 cosmologists 57 comets 57 gamma rays 56 astrophysicists 56 CMEs 56 nebula 56 asteroids 56 exoplanet 56 orbits 56 NASA Chandra 56 extrasolar planet 56 Betelgeuse 55 galaxy 55 cosmic rays 55 supermassive black hole 55 Milky Way galaxy 55 neutrinos 55 celestial objects 55 unaided eye 55 Astronomers 54 atomic nuclei 54 magnetic fields 54 celestial bodies 54 nuclei 54 outer planets 54 Sedna 54 Kuiper Belt 54 dwarf planets 54 magnetosphere 53 cosmic ray 53 fainter 53 Milky Way 53 olivine 53 spacetime 53 silicates 53 vortices 53 oscillations 53 auroras 52 meteorites 52 interferometry 52 interstellar medium 52 meteors 52 neutrino 52 infrared wavelengths 52 cosmic microwave background 52 spectra 52 Gliese 52 Jupiter Saturn Uranus 52 neutrons 52 positrons 51 Spitzer Space Telescope 51 astrophysical 51 comet