Why do we have a night sky?

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Just saw a video of the hubble telescope zooming into a small patch of seemingly empty night sky revealing millions of stars and galaxies invisible to the naked eye.

Makes me wonder, if space is mostly empty and there’s possibly infinite number of stars and galaxies in any given part of the night sky, shouldn’t the night be as bright as the day?

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Anonymous 0 Comments

Stars are really far, so far that even stray atoms and space dust scattered in mostly empty space dim their light eventually. All the stars that you see with naked eye as single stars are closer than 10000 lightyears or so.

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