What's Hot This Week Distant Spiral Galaxy May Reveal Clues About Our Milky Way By SPACE.com Staff A beautiful spiral galaxy 60 million light-years from Earth could help astronomers better understand our own Milky Way because of a trademark central bar-like structure.     Earth's Seasons Change at Wednesday's Not-So-Equal Equinox By Joe Rao The seasons on Earth will officially change Wednesday, heralding their shifting nature with an astronomical feat: the autumnal equinox.     Sponsored by: Hellish Venus Atmosphere May Have Had Cooling Effect 'Star Trek' Actor William Shatner Boldly Talks a Little $#*! Shuttle Discovery's Last Launch Pad Trip Cannibal Star Gobbles Up Companion and Starts Acting Younger Rare Sky Show: Two Planets Align with Harvest Moon

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