Related by context. Frequent words. (Click for all words.) 61 Crab Nebula 59 Andromeda Galaxy 59 Betelgeuse 59 Andromeda galaxy 59 globular cluster 58 Orion Nebula 58 Fomalhaut 58 constellation Orion 57 spiral galaxy 56 supernova remnant 56 planetary nebula 55 constellation Leo 54 distant galaxy 54 Cancri 54 HD #b [002] 54 Milky Way Galaxy 53 Scorpius 53 Cassiopeia 53 Large Magellanic Cloud 53 Eta Carinae 53 nebula 53 planetary nebulae 53 constellation Perseus 52 star Gliese 52 dwarf galaxy 52 galaxy 51 M# M# [001] 51 M# [002] 51 galaxy cluster 51 Arcturus 51 planet orbits 51 Kuiper belt 51 XMM Newton 50 supernova explosion 50 GRB # 50 Galaxy Evolution 50 Mimas 49 Milky Way 49 brown dwarf 49 Lutetia 49 magnetar 49 gamma ray burst 49 celestial object 48 La Silla Chile 48 extrasolar planet 48 Mauna Kea Hawaii 48 XP# [004] 48 Gamma ray bursts 48 Deneb 48 Milky Way galaxy 48 Spica 48 planet orbiting 48 cigar shaped 48 Sedna 47 planetoid 47 COROT 47 Nebula 47 supernova 47 Comet McNaught 47 Suzaku 47 redshift 47 Voyager spacecraft 47 ellipse 47 infrared wavelengths 47 ringed planet 47 Gliese 47 solar corona 47 exoplanets 47 spiral galaxies 46 constellation 46 ecliptic 46 radial velocity 46 interferometry 46 Andromeda 46 globular clusters 46 Halley comet 46 nebulae 46 Phaethon 46 supergiant 46 supernova remnants 46 GeV 46 Martian equator 46 planets orbiting 46 innermost planet 46 comet nucleus 46 Gliese #g 46 Comet Tempel 1 46 observable universe 46 Very Large Telescope 46 ESO Very Large Telescope 45 Astrophysicists 45 extrasolar planets 45 unaided eye 45 photometry 45 Phobos 45 Ursa Major 45 M# [005] 45 optical telescope 45 supermassive black hole 45 Valles Marineris 45 distant galaxies