Related by context. Frequent words. (Click for all words.) 59 GRBs 59 globular clusters 58 brown dwarfs 57 habitable planets 57 spiral galaxies 57 planets 56 rocky planets 56 Orion Nebula 56 extrasolar planets 56 terrestrial planets 55 exoplanets 55 super Earths 55 planets orbiting 55 comets 55 supernovae 55 celestial bodies 54 ejecta 54 astronomical objects 54 extrasolar planet 54 Saturn rings 54 orbits 54 XMM Newton 54 celestial object 54 supernovas 53 Milky Way Galaxy 53 COROT 53 elliptical galaxies 53 hot Jupiters 53 meteoroids 52 ecliptic 52 magnetar 52 exoplanet 52 distant galaxies 52 muon 52 brown dwarf 52 dwarf galaxies 52 HD #b [002] 52 astronomical observations 52 gamma ray bursts 52 galaxy clusters 52 occultation 52 Saturn moons 52 infrared wavelengths 52 nebulae 51 gamma ray burst 51 supernova explosions 51 supernova explosion 51 dwarf galaxy 51 globular cluster 51 Eta Carinae 51 moons 51 astronomers 51 asteroids 51 X ray emission 51 meteoroid 51 optical telescopes 51 moon Europa 51 unaided eye 51 spectroscopic 51 abundances 50 OGLE 50 distant galaxy 50 pulsars 50 Lutetia 50 Mimas 50 galaxies 50 comet 50 astrophysical 50 redshift 50 planet orbiting 50 interferometry 50 Earth asteroids 50 celestial objects 49 quasars 49 Betelgeuse 49 Milky Way galaxy 49 spiral galaxy 49 outer planets 49 comet nucleus 49 Kuiper belt 49 Spitzer Space Telescope 49 supernova remnant 49 nebula 49 interstellar dust 49 gravitational wave 48 substorms 48 radioactive decay 48 Andromeda galaxy 48 WIMPs 48 Geminids 48 interstellar medium 48 Large Magellanic Cloud 48 neutrino 48 asteroid 48 galaxy cluster 48 gravitational lensing 48 silicates 48 planetary 48 gamma rays 48 photometric 47 thermal emission spectrometer