Related by context. Frequent words. (Click for all words.) 49 Pleiades 49 Scorpius 47 Spica 45 Arcturus 45 Procyon 44 constellation 44 Betelgeuse 44 Cassiopeia 41 Cygnus 41 Andromeda 41 Uranus 40 Regulus 40 Ursa Major 39 Orion Nebula 39 Gamma 38 Nebula 38 nebula 38 Big Dipper 38 Milky Way Galaxy 38 nebulae 38 Eta Carinae 38 Antares 37 Milky Way 37 planets orbiting 37 HD #b [002] 37 Sagittarius 37 Perseus 36 constellations 36 Ophiuchus 36 Pisces 36 Sedna 36 Aldebaran 36 Phobos 36 circular orbit 35 bluish 35 Virgo 35 fainter 35 Jupiter 34 extrasolar planet 34 Auriga 34 Ganymede 34 perigee 34 celestial 34 crescent 33 Zeus 33 globular clusters 33 brown dwarfs 33 Canopus 33 twinkles 33 spiral galaxy 33 distant galaxy 33 Alpha Centauri 33 Rahu 33 Io 33 galaxy 33 supernovae 32 supernovas 32 spiral galaxies 32 orbits 32 outer planets 32 unaided eye 32 interstellar space 32 Galaxies 32 Helios 32 Stargazer 32 Gliese 32 supernova explosions 32 orb 31 Venus 31 Altair 31 crescent moon 31 Icarus 31 Saturn 31 Artemis 31 supernova 31 extrasolar planets 31 planet orbiting 31 infrared wavelengths 31 Spitzer Space Telescope 31 Athena 31 suns 30 celestial objects 30 ringed planet 30 brown dwarf 30 ellipse 30 Hera 30 planetary 30 Fragment 30 Solar System 30 planets 30 equator 30 XMM Newton 30 Milky Way galaxy 30 dwarf galaxy 30 Horus 30 Full Moon 30 Grendel 30 Xenon 30 astrological 30 occultation 30 Perseids