The line of latitude 66°34′N (often taken as 66 Along this line the sun does not set on the day of the summer solstice, about June 21, and does not rise on the day of the winter solstice, about December 22. From this line the number of twenty- four-hour periods of continuous day or of continuous night increases northward to about six months each at the North Pole.
The parallel of latitude approximately 66°30' north. It forms the boundary between the North Temperate and North Frigid zones. This parallel marks the southern limit of the area within which for at least one day each year the Sun does not set (about June 21st) or rise (about December 21st).
parallel of latitude at 66°N
r-tic cir-ul The parallel of latitude 66°C 33' N., forming an imaginary line round the Arctic regions.
a line of latitude near but south of the north pole; it marks the northernmost point at which the sun is visible on the northern winter solstice and the southernmost point at which the midnight sun can be seen on the northern summer solstice
Parallel of latitude 66°30' N; at this latitude the noon altitude of the Sun is 0° on the date of the winter solstice.
The imaginary boundary of the northern polar region
This is the parallel of latitude that runs approximately 66.5º north of the Equator. Within the Arctic Circle, the arctic sun is above the horizon for, at least, 24 continuous hours per year at the time of the summer solstice , and at winter solstice, the arctic sun is below the horizon for at least 24 continuous hours.
The Arctic Circle is an imaginary circle at latitude 66°30' N, around the north pole.
The line of latitude on Earth's surface that is 23.5 degrees south of the North Pole. The Arctic Circle marks the southernmost point in the Northern Hemisphere that experience the Midnight Sun.
A line of latitude at 66° 33' North, when shown as a fixed position on a map, delineates a region, which at the time of the summer solstice (in the Northern Hemisphere), the Sun is above the horizon at local midnight time at all points in this region. Also the complement of the Tropic of Cancer, which lies at latitude 23° 27' North.
an imaginary circle that is 23 degrees 28 minutes south of the North Pole (and parallel to the equator).
An imaginary circle on the surface of the earth at 66.5°N latitude, or, 23.5° south of the North Pole. It marks the northernmost point at which the sun can be seen at the winter solstice (about Dec. 22) and the southernmost point of the northern polar regions at which the midnight sun is visible..
66.5 degrees north latitude, 23.5 degrees latitude south of the Earth's north pole. Above this latitude, the summer sun never sets, and the winter sun never rises.
The Arctic Circle is one of the five major circles of latitude that mark maps of the Earth. This is the parallel of latitude that (in 2000) runs 66° 33′ 39″ (or 66.56083°) north of the Equator. Everything north of this circle is known as the Arctic, and the zone just to the south of this circle is the Northern Temperate Zone.