Related by context. Frequent words. (Click for all words.) 57 GRBs 57 WIMPs 57 magnetar 55 supersymmetry 55 elliptical galaxies 54 HD #b [002] 54 rocky planets 54 redshift 53 globular clusters 53 supernovas 53 supernova remnant 53 unaided eye 53 cosmologists 52 Eta Carinae 52 brown dwarfs 52 gravitational lensing 52 meteoroid 52 Saturn rings 52 hot Jupiters 51 globular cluster 51 super Earths 51 spiral galaxies 51 brown dwarf 51 distant galaxy 51 cosmic microwave background 51 dwarf galaxies 51 planet orbiting 51 extrasolar planet 51 habitable planets 51 GeV 51 muon 51 Milky Way Galaxy 51 X ray emission 50 constellation Perseus 50 astrophysicists 50 Kuiper belt 50 supernovae 50 Andromeda galaxy 50 Andromeda Galaxy 50 ionized gas 50 quasar 50 spacetime 50 corona 50 Betelgeuse 50 nebulae 50 astronomical objects 50 constellation Leo 50 nebula 50 gamma ray bursts 50 quasars 50 neutron star 50 neutron stars 50 Sedna 49 galaxy clusters 49 Einstein theory 49 COROT 49 distant galaxies 49 supernova 49 X ray Observatory 49 Milky Way 49 ejecta 49 dwarf galaxy 49 gamma ray burst 49 spiral galaxy 48 cosmic ray 48 gravitational wave 48 exoplanets 48 galaxies 48 gravitational waves 48 galaxy cluster 48 supernova explosions 48 terrestrial planets 48 exoplanet 48 planets orbiting 48 Lutetia 47 meteoroids 47 Mimas 47 general relativity 47 halos 47 Milky Way galaxy 47 celestial object 47 planets 47 subatomic particles 47 auroral 47 Enceladus 47 cosmological 47 meteors 47 supernova explosion 47 extrasolar planets 46 Jupiter moons 46 Orion Nebula 46 Geminids 46 Astronomers 46 particle accelerators 46 infrared wavelengths 46 spectroscopic 46 astronomers 46 astrophysical 46 WM Keck Observatory 46 WMAP 46 JILA