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Antarctic CircleLatitude of 66.5° South. The northern limit of the area of the Earth that experiences 24 hours of darkness or 24 hours of day at least one day during the year.
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Antarctic Circleline of latitude at 66.5 degrees south that encircles the continent of Antarctica.
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Antarctic CircleThe Antarctic Circle is an imaginary circle at latitude 66°30' S, around the south pole.
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Antarctic CircleThe circle of latitude south of which, on the solstices, every location experiences a period of continuous day or night (Lesson 29)
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Antarctic CirclePoleward of this latitude (66 degrees 33 minutes S) there are 24 hours of sunlight on the summer solstice and 24 hours of darkness on the winter solstice.
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