antarctic circle
1 of 1noun/æntˈɑrktɪk ˈsɜrkəl/
Forms:Antarctic Circles
1
an imaginary circle around 66.5 degrees south of the equator, marking the southernmost point where the sun stays above or below the horizon for 24 hours during the respective solstices
- The Antarctic Circle is a latitude line that sits around 66.5 degrees south of the equator.
- Regions within the Antarctic Circle experience periods of continuous daylight during the Southern Hemisphere's summer solstice.
- During the winter solstice, areas within the Antarctic Circle encounter 24 hours of darkness.
- The Antarctic Circle is a significant reference for understanding polar day and polar night phenomena.
- The Antarctic Circle is a crucial geographical marker for studying the Earth's axial tilt and its impact on daylight hours.