Technically, they are the latitudes farthest from the north and south poles that have a
continuous period of 24 hours without a sunset, and a similar period without a sunrise.
Mid-latitudes
Those are the "polar" regions.
"High" latitudes. The equator has a latitude of zero. The area between the Tropic of Cancer (at 23.5 degrees north) and the Tropic of Capricorn (at 23.5 degrees south) are the "tropics" or low latitudes. The "polar regions" are above the Arctic Circle or below the Antarctic Circle, where the latitudes are higher than 66.5 degrees (north or south) are "high". The areas between the tropics and the arctic/antarctic are called "mid-latitudes or "temperate zones".
Arctic Circle, Tropic Of Cancer, Equator, Tropic Of Capricorn, Antarctic Circle (from top to bottom)
The Tropic of Cancer is to the Tropic of Capricorn as the Arctic Circle is to the Antarctic Circle. They are lines of latitude either north (Arctic Circle, Tropic of Cancer) or south of the equator.
The Arctic Circle is in the Northern Hemisphere and encompasses the area around the North Pole, while the Antarctic Circle is in the Southern Hemisphere and surrounds the South Pole. The Arctic Circle is predominantly ocean surrounded by land, while the Antarctic Circle is mostly landmass surrounded by ocean. Both circles mark the latitudes where 24 hours of continuous daylight or darkness can occur, depending on the time of year.
Antarctic Circle
The Arctic Circle is located in the Northern Hemisphere, while the Antarctic Circle is in the Southern Hemisphere. The Arctic Circle surrounds the North Pole, while the Antarctic Circle surrounds the South Pole. The Arctic Circle has Arctic tundra vegetation, while the Antarctic Circle is largely covered in ice.
The Arctic and the Antarctic
The parallel latitude that circumscribes the polar tundra zone is the Arctic Circle in the Northern Hemisphere and the Antarctic Circle in the Southern Hemisphere. These latitudes mark the boundaries of the tundra biome, characterized by cold temperatures and a lack of trees due to permafrost.
The Antarctic Circle is parallel to the Arctic Circle, as they both mark the latitudes at approximately 66.5 degrees north and south, respectively. These circles denote the points where the sun does not set on the summer solstice and does not rise on the winter solstice.
The Arctic and the Antarctic respectively.