November 22, 2019

How Far Can YOU See?

How far can you see with that thing?” I hear that one a lot at star parties. It’s a sort of ambiguous question to an astronomer; distance varies with the scale of the structures in our universe observed, and a myriad of factors both near and far conspire to make this number an enigma not as straight forward as it might sound. On the Earth, we’re limited by the atmosphere and the curvature of the planet to a line of sight of maybe 50 or so miles on a clear day from a high mountain top… but in space…

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