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The Andromeda Galaxy, despite being 2.5 million light years away, is the biggest and brightest in our sky. It covers an area several times bigger than the diameter of a full moon. If you go to even a moderately dark location it is easy to spot with the naked eye. Several satellite galaxies can also be seen in this picture. This was taken in the Bitterroot Mountains in Idaho which has some of the darkest skies I've ever photographed.