Related by context. Frequent words. (Click for all words.) 74 planets orbiting 70 planet orbiting 69 exoplanets 68 rocky planets 68 extrasolar planets 68 planets 68 Eta Carinae 67 brown dwarfs 67 HD #b [002] 66 GRBs 66 distant galaxy 66 brown dwarf 66 supernova explosion 65 Orion Nebula 65 globular clusters 65 nebulae 64 terrestrial planets 64 distant galaxies 64 quasars 63 elliptical galaxies 62 galaxies 62 Milky Way Galaxy 62 supernovae 62 Milky Way galaxy 62 supernovas 61 unaided eye 61 supernova explosions 61 Saturn moons 61 extrasolar planet 61 spiral galaxies 61 Spitzer Space Telescope 61 Earth asteroids 61 dwarf galaxies 60 Betelgeuse 60 Milky Way 60 gamma ray burst 60 orbits 60 galaxy cluster 60 asteroids 60 exoplanet 59 galaxy 59 celestial objects 59 XMM Newton 59 gamma ray bursts 58 infrared wavelengths 58 positrons 58 outer planets 58 planetary 58 pulsars 58 nebula 58 supermassive black holes 57 quasar 57 Gliese 57 supernova 57 astrophysical 57 redshift 57 Saturn rings 57 supermassive black hole 57 galaxy clusters 57 asteroid 57 astronomers 56 solar flares 56 spiral galaxy 56 neutrino 56 comets 56 neutron star 56 pulsar 56 WM Keck Observatory 56 neutrinos 56 orbiting 56 interstellar dust 55 Very Large Telescope 55 optical telescopes 55 moons 55 gamma rays 55 Alpha Centauri 55 Sedna 55 celestial bodies 55 comet 55 neutron stars 55 moon Europa 55 auroras 55 ejecta 55 gravitational lensing 54 X ray Observatory 54 Solar System 54 Earths 54 gravitationally 54 ringed planet 54 NASA Chandra 54 Saturn moon 54 NASA Cassini spacecraft 54 suns 54 Lutetia 54 occultation 54 gravitational waves 54 meteor showers 54 Kuiper Belt 54 telescopes 54 observatories 54 moon Titan