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sunset calculation
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The Exact Time of Sundown Today: What You Need to Know
The discrepancy between civil twilight (when the sun is 6° below the horizon) and nautical twilight (12° below) can shift the perceived time of sundown by...
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The discrepancy between civil twilight (when the sun is 6° below the horizon) and nautical twilight (12° below) can shift the perceived time of sundown by...