Civil polar night

Civil polar night occurs at locations where the geometric centre of the Sun does not rise above 6 degrees below the horizon for at least 24 hours (there is no civil twilight during the winter solstice). Around local noon, only nautical twilight can be experienced. It occurs at latitudes located 6 degrees north of the Arctic Circle and 6 degrees below the Antarctic Circle, which confines it to the latitudes north of 72.56°N and south of 72.56°S.

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