Related by context. Frequent words. (Click for all words.) 65 constellation Leo 59 distant galaxy 59 Betelgeuse 59 spiral galaxy 58 constellation Orion 58 Andromeda Galaxy 58 Andromeda galaxy 57 Large Magellanic Cloud 57 nebula 56 constellation Perseus 56 Orion Nebula 56 globular cluster 56 nebulae 56 galaxy cluster 56 astronomical objects 56 Pleiades 55 Milky Way Galaxy 55 Milky Way 55 Cassiopeia 55 Crab Nebula 55 HD #b [002] 55 Mimas 54 supernova remnant 54 spiral galaxies 54 dwarf galaxy 54 Kuiper belt 53 Cancri 53 distant galaxies 53 XMM Newton 53 visible wavelengths 53 celestial object 53 constellations 53 Scorpius 52 Fomalhaut 52 Sedna 52 Nebula 52 galaxies 52 galaxy 51 Gamma ray bursts 51 Andromeda 51 Aldebaran 51 ecliptic 51 constellation 51 redshift 51 Arcturus 51 Deneb 51 Eta Carinae 51 unaided eye 51 celestial objects 50 quasar 50 quasars 50 magnetar 50 dwarf galaxies 50 Milky Way galaxy 50 planet orbits 50 starbursts 49 Ursa Major 49 gamma ray burst 49 planet orbiting 49 globular clusters 49 brown dwarfs 49 Bootes 49 Alpha Centauri 49 COROT 49 infrared wavelengths 49 auroral 49 GRBs 49 Ophiuchus 48 gravitationally 48 Voyager spacecraft 48 X ray emission 48 habitable planets 48 Iapetus 48 ionized gas 48 ringed planet 48 brown dwarf 48 planets 48 starlight 48 supernova explosion 48 Little Dipper 47 Gliese #g 47 whorls 47 Leonids 47 extrasolar planet 47 Jupiter Saturn 47 super Earths 47 pulsar 47 Spitzer Space Telescope 47 umbra 47 elliptical galaxies 47 accretion disk 47 exoplanets 46 celestial 46 ESO Very Large Telescope 46 ejecta 46 ellipse 46 moons 46 luminous 46 comet 46 galaxy clusters 46 terrestrial planets