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imagine we now represent the milky way by a single grain of sand. the universe is billion light years across. how many feet would this correspond to?
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imagine we now represent the milky way by a single grain of sand. the universe is billion light years across. how many feet would this correspond to?

User Shan Eapen Koshy
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If our Milky Way galaxy, which is around 125,000ly across was to be shrunken down to a grain of sand, the observable universe would be roughly 372 meters (1220 feet) wide.
User Xavi Rigau
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