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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Sunset, sunrise, civil & nautical twilight
From: Dave Weilacher
Date: 2002 Jan 30, 2:04 PM
From: Dave Weilacher
Date: 2002 Jan 30, 2:04 PM
A definition I've read for these is: Sunset occurs right when the top of the sun disappears over the horizon. Civil twilight occurs when the sun is 6 degrees below the horizon, and nautical twilight occurs at 12 degrees. Sunset might make sense but the 6 and 12 degree notion doesn't seem right to me. The closer to a pole you are, the longer twilight lasts (yes or no?) in which case the degrees don't work. Would someone be willing to clarify this for me? -------------------------------------------------------------------- mail2web - Check your email from the web at http://mail2web.com/ .
