Related by context. Frequent words. (Click for all words.) 66 extrasolar planets 66 distant galaxies 66 GRBs 65 astronomical objects 65 XMM Newton 65 exoplanets 64 elliptical galaxies 64 extrasolar planet 64 supernovae 64 quasars 64 redshift 63 distant galaxy 63 globular clusters 63 Andromeda galaxy 63 planets orbiting 63 pulsars 63 supernovas 62 cosmologists 62 Andromeda Galaxy 62 galaxies 62 brown dwarfs 62 astronomers 62 galaxy clusters 62 gamma ray bursts 62 cosmic microwave background 62 supernova remnant 61 globular cluster 61 optical telescopes 61 muons 61 X ray emission 61 HD #b [002] 61 habitable planets 61 rocky planets 61 magnetar 61 gravitational waves 61 WIMPs 61 Orion Nebula 61 super Earths 61 spectroscopic 60 NASA Chandra 60 terrestrial planets 60 planets 60 comet nucleus 60 supernova explosions 60 Milky Way Galaxy 60 dwarf galaxy 60 dwarf galaxies 60 exoplanet 60 Saturn rings 59 Milky Way galaxy 59 supernova explosion 59 Eta Carinae 59 gamma ray burst 59 infrared wavelengths 59 nebulae 59 pulsar 59 spiral galaxies 59 astrophysical 58 COROT 58 planet orbiting 58 quark gluon plasma 58 cosmic rays 58 celestial objects 58 gravitational wave 58 Spitzer Space Telescope 58 gravitational lensing 58 galaxy cluster 58 comets 58 gamma rays 58 interferometry 58 WMAP 58 astrophysicists 57 quasar 57 supernova 57 gamma ray 57 Very Large Array 57 hot Jupiters 57 celestial bodies 57 neutrinos 57 ESO Very Large Telescope 57 Saturn moons 57 neutrino 57 ejecta 57 neutron stars 57 Kuiper belt 56 NASA Cassini spacecraft 56 astronomical observations 56 supermassive black holes 56 celestial object 56 interstellar dust 56 positrons 56 Large Magellanic Cloud 56 atomic particles 56 aerosol particles 56 WM Keck Observatory 56 spectra 56 infrared telescope 55 Hubble Telescope 55 X ray Observatory 55 subatomic particles 55 Very Large Telescope