The Antarctic Circle -- about 66 degrees S -- marks the latitude beyond which the geography experiences at least one 24-hour period of no sunrise or sunset annually.
At the South Pole -- 90 degrees S, this period is six months of no sunrises or sunsets.
Northern
I'm not positive, but I think it's the June Solstice.
the tilt of the earth's axis
Never.The Antarctic Circle marks the latitude on planet earth south of which at least one 24-hour period has no sunrise or no sunset.All latitudes north of the Antarctic Circle experience one sunrise and one sunset each day...until the latitude of the Arctic Circle, where the reverse occurs.
The Antarctic Circle
North of the Arctic Circle and south of the Antarctic one, the periods of daylight and darkness both vary from zero to six months, during the course of a year.
This phenomenon occurs because the Earth tilts away from the sun, and this is the day where the extent of that phenomenon is shortest: one 24-hour period.
The Southern Hemisphere experiences summer when it's winter in the Northern Hemisphere.
Areas north of the Artic Circle
Areas north of the Artic Circle
Areas north of the Artic Circle
During the Southern Hemisphere summer (Dec 21 to March 22), the Antarctic continent south of the Antarctic Circle experiences at least one 24 hour period of daylight. At South Pole, there is no sunset for six months. During the Southern Hemisphere winter (June 21 to Sept 22), the Antarctic continent south of the Antarctic Circle experiences at least experiences one 24 hour period of darkness. At the South Pole, there is no sunrise for six months. Since the continent of Antarctica is 10% of the earth's surface: as large as USA and Mexico, combined, the length of 24 hour sun or no sun varies, as above