Related by context. Frequent words. (Click for all words.) 69 planet orbiting 68 Eta Carinae 66 planets orbiting 65 globular cluster 65 HD #b [002] 64 extrasolar planet 64 magnetar 63 super Earths 63 Andromeda galaxy 62 supernova 62 brown dwarf 62 distant galaxy 61 brown dwarfs 61 COROT 61 X ray emission 61 supernova remnant 61 XMM Newton 61 Milky Way Galaxy 60 Orion Nebula 60 dwarf galaxy 60 exoplanet 60 rocky planets 60 globular clusters 60 exoplanets 60 supernova explosion 60 gamma ray burst 60 elliptical galaxies 59 quasar 59 galaxy 59 celestial object 59 galaxy cluster 59 spiral galaxy 59 terrestrial planets 59 neutron star 59 extrasolar planets 59 unaided eye 58 Andromeda Galaxy 58 nebula 58 GRBs 58 supernova explosions 58 Betelgeuse 57 pulsar 57 spiral galaxies 57 Milky Way galaxy 57 Milky Way 56 planets 56 infrared wavelengths 56 gamma rays 56 dwarf galaxies 56 redshift 56 nebulae 56 galaxies 56 Gliese 55 Sedna 55 astronomers 55 supernovae 55 astronomical objects 55 Large Magellanic Cloud 55 gravitationally 54 distant galaxies 54 GeV 54 ejecta 54 constellation Leo 54 galaxy clusters 54 auroral 54 habitable planet 54 interstellar dust 54 hot Jupiters 54 Solar System 53 ringed planet 53 quasars 53 Spitzer Space Telescope 53 pulsars 53 orbits 53 nova 53 orbiting 53 gamma ray bursts 53 fainter 53 neutron stars 53 cosmic ray 53 UB# [003] 53 gravitational wave 53 luminosity 52 optical telescopes 52 comet nucleus 52 comet 52 astrophysical 52 corona 52 astrophysicists 52 interstellar medium 52 celestial objects 52 Alpha Centauri 52 supermassive black hole 52 neutrino 52 supermassive black holes 52 Cassiopeia 52 gravitational lensing 51 habitable zone 51 sunspot 51 cosmic microwave background 51 supernovas