Find your Acrtic Circle - Additional information

Further information
	The tip of the Earth's axis of rotation on the northern hemisphere.
	The line on the surface of the Earth, on whose north side the sun does not rise for one day during winter, nor set during summer for at least one day.
	The line on the surface of the Earth, on which the sun shines perpendicularly at high noon during summer solstice.
	The line on the surface of the Earth, on which the sun shines perpendicularly at high noon during equinoxes.
	The line on the surface of the Earth, on which the sun shines perpendicularly at high noon during winter solstice.
	The line on the surface of the Earth, on whose south side the sun does not rise during summer, nor set during winter for at least one day.
	The tip of the Earth's axis of rotation on the southern hemisphere.
	The Earth's axis of rotation goes through the Poles and is on average at a 66,5° angle towards the Earth's plane of orbit. The angle of the axis, and at the same time it's inclination varies constantly. The movement is created by gravitational forces from, among other things, the moon and other planets.
	The Arctic Circle is in continuous motion. It depends on the continuous wavering of the Earth's axis of rotation. The movement reaches it's maximum value in timeframes of about 41 000 years. The distance between the extreme positions of the Arctic Circle has been as much as 250 km over the ages.