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Article #994Blue Sky at Night
From: tvaughan
Date: Mon, 10 Aug 1992 18:27
Date: Mon, 10 Aug 1992 18:27
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An interesting sidelight to the ongoing blue sky and Olbers' paradox discussion is the fact that the night sky is almost exactly the same color as the daytime sky, only much dimmer. The reason for this is that moonlight has almost the same spectral composition as sunlight. Long-exposure photos of the night sky verify this quite dramatically. See, for instance, _Rainbows, Halos, and Glories_ by Greenler. Tim
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Path: arc1-ca.pugleaf.net!sparky!uunet!elroy.jpl.nasa.gov!usc!zaphod.mps.ohio-state.edu!pacific.mps.ohio-state.edu!linac!att!bu.edu!buphyk.bu.edu!tvaughan From: tvaughan@buphyk.bu.edu (tvaughan) Newsgroups: sci.physics Subject: Blue Sky at Night Message-ID: <93291@bu.edu> Date: 10 Aug 92 18:27:00 GMT Sender: news@bu.edu Organization: Boston University Physics Department Lines: 10