Related by context. Frequent words. (Click for all words.) 50 Arcturus 49 constellation Leo 49 Betelgeuse 48 Fomalhaut 48 Deneb 47 constellation Orion 47 constellation Perseus 47 Crab Nebula 46 Cassiopeia 46 Bootes 46 Scorpius 45 planet orbiting 45 constellation 44 celestial object 44 Andromeda Galaxy 44 Sedna 44 HD #b [002] 44 XMM Newton 44 planetary nebula 44 globular cluster 43 Spica 43 Milky Way Galaxy 43 Mimas 43 Pleiades 43 GRB # 42 COROT 42 astronomical objects 42 nebula 42 ecliptic 42 Nebula 41 extrasolar planet 41 spiral galaxy 41 Cancri 41 supernova remnant 41 Andromeda galaxy 41 Eta Carinae 41 magnetar 40 shines brightly 40 distant galaxy 40 Andromeda 40 interferometer 40 orb 40 ESO Very Large Telescope 40 Large Magellanic Cloud 40 infrared wavelengths 40 Orion Nebula 40 luminous 40 optical telescope 39 reddish color 39 ellipse 39 Astrophysicist 39 galaxy 39 Pollux 39 auroral 39 supernova 39 unaided eye 39 Alpha Centauri 39 constellations 39 redshift 39 planets orbiting 39 supernovas 39 Ursa Major 39 dwarf galaxy 39 Deimos 38 globular clusters 38 interferometry 38 Venusian 38 Charon 38 quasar 38 X ray emission 38 galaxy cluster 38 Procyon 38 Kuiper belt 38 occultation 38 planetoid 37 extrasolar planets 37 halo 37 ejecta 37 Aldebaran 37 planet orbits 37 supernova remnants 37 luminosity 37 OGLE 37 pulsar 37 Jupiter Saturn 37 phosphorescence 37 Gamma ray bursts 37 Milky Way 37 tiger stripes 37 Spitzer Space Telescope 37 accretion disk 37 celestial objects 37 supernovae 37 haloes 37 Ophiuchus 37 VLBA 36 brown dwarf 36 coppery 36 Aurora Borealis 36 GRBs 36 fainter