The parallel of latitude that runs 66° 33′ 39″ north of the Equator. The region north of this circle is known as the Arctic
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
The line of latitude 6634N (often taken as 66N) 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 that is approximately 66 5 degrees north of the equator and that circumscribes the northern frigid zone
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
is a line of latitude at 66°33'N On the shortest day of the year, the center of the sun does not rise above the horizon at this latitude
is a line of latitude at 66°33'N On the shortest day of the year, the center of the sun does not rise above the horizon at this latitude
Parallel of latitude 66°30' N; at this latitude the noon altitude of the Sun is 0° on the date of the winter solstice