Related by context. Frequent words. (Click for all words.) 70 extrasolar planets 69 globular clusters 68 planets 68 rocky planets 67 GRBs 67 elliptical galaxies 67 brown dwarfs 66 planets orbiting 66 exoplanets 65 dwarf galaxies 65 Saturn rings 65 galaxies 64 galaxy clusters 64 terrestrial planets 64 ejecta 64 quasars 63 supernovae 63 optical telescopes 63 comets 63 HD #b [002] 62 spiral galaxies 62 orbits 62 infrared wavelengths 61 extrasolar planet 61 distant galaxies 61 asteroids 61 Sedna 61 Orion Nebula 60 astronomers 60 planet orbiting 60 XMM Newton 60 outer planets 60 nebulae 60 galaxy cluster 60 celestial bodies 60 gamma ray bursts 60 silicates 60 exoplanet 60 pulsars 60 Eta Carinae 59 moons 59 Milky Way Galaxy 59 supernovas 59 Saturn moons 59 brown dwarf 59 comet nucleus 59 redshift 59 distant galaxy 58 unaided eye 58 Saturn moon 58 Enceladus 58 Earth asteroids 58 Milky Way galaxy 58 olivine 58 Milky Way 58 interstellar dust 58 gravitational lensing 58 supernova explosion 57 moon Europa 57 Kuiper Belt 57 neutron stars 57 abundances 57 dust devils 57 celestial objects 57 magnetosphere 57 Solar System 57 nebula 57 organic molecules 56 spectra 56 galaxy 56 Spitzer Space Telescope 56 astrophysical 55 gamma ray burst 55 solar flares 55 Astronomers 55 comet 55 nuclei 55 Phobos 55 neutron star 55 interferometry 55 Martian surface 55 supernova 55 magnetic fields 55 dwarf planets 55 NASA Cassini spacecraft 55 quasar 54 occultation 54 Jupiter Saturn Uranus 54 wavelengths 54 CMEs 54 asteroid 54 sunspots 54 meteorites 54 X ray Observatory 54 craters 54 NEOs 54 regolith 54 gravitational waves 54 cometary 54 astrophysicists 54 supermassive black holes