Related by context. Frequent words. (Click for all words.) 62 constellation Leo 59 constellation Orion 57 constellation Perseus 56 Andromeda Galaxy 56 Betelgeuse 55 Scorpius 55 Fomalhaut 53 planetary nebula 53 Pleiades 53 constellation 53 planet Uranus 52 celestial object 52 nebulae 52 Cassiopeia 52 constellations 52 aurorae 51 planetary nebulae 51 Orion Nebula 51 Galaxy Evolution 51 Andromeda galaxy 51 unaided eye 51 Crab Nebula 51 Mimas 51 Bootes 51 Cancri 51 Arcturus 51 Sunspots 51 Deneb 51 ecliptic 51 Kuiper belt 50 globular cluster 50 distant galaxy 50 Oort Cloud 50 Olympus Mons 50 Aurora Borealis 49 celestial objects 49 Nebula 49 Eta Carinae 49 Milky Way 49 Sagittarius 49 nebula 49 supernova remnant 49 Cepheids 49 spiral galaxy 49 Milky Way Galaxy 48 Spica 48 Large Magellanic Cloud 48 Gamma ray bursts 48 astronomical objects 48 reddish 48 haloes 48 Perseids 48 HD #b [002] 48 galaxy cluster 48 moonlets 48 luminous 48 Venusian 47 celestial 47 Supernovae 47 faintly visible 47 reddish hue 47 Lunar eclipse 47 Ursa Major 47 Suzaku 47 dwarf galaxy 47 shines brightly 47 ringlets 47 Valles Marineris 47 XMM Newton 47 coppery 47 iridescent blue 47 Comet McNaught 46 star Gliese 46 Jupiter Saturn 46 Kuiper Belt objects 46 infrared wavelengths 46 globular clusters 46 Procyon 46 umbra 46 tiny specks 46 quasars 46 occultation 46 twinkles 46 planet orbits 46 optical wavelengths 46 Phaethon 46 supernova remnants 45 magnetars 45 tiger stripes 45 La Silla Chile 45 aurora 45 annular eclipse 45 Sunspot 45 reddish color 45 GRBs 45 reddish purple 45 X ray emission 45 microlensing 45 Sedna 45 Mauna Kea Hawaii 45 GRB #