The Antarctic <<ant AHRK tihk>> Circle is an imaginary line that runs around the globe near the South Pole. It lies at 66 degrees 33 minutes southlatitude. Latitude is a measure of distance north or south of the equator. The equator is at 0 degrees latitude, and the South Pole is at 90 degrees south latitude. Almost the entire continent of Antarctica is inside the Antarctic Circle.
In every place on the Antarctic Circle, the sun never sets on the longest day of summer, around December 21. In the same places, the sun never rises on the shortest day of winter, around June 21. In places farther south, there are more days in summer when the sun never sets. There are also more days in winter when the sun never rises. At the South Pole, the sun remains in the sky for 90 days before and 90 days after December 21. The sun cannot be seen for 90 days before and 90 days after June 21.
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