Arctic Circle


This is the name given to an imaginary line parallel to the Earth, it is located in the arctic region of the Earth, specifically at latitude 66 ° 33′ 44”, this line is found through different countries, such as Canada, Russia , Finland, Denmark, Finland, Norway and Sweden, in the northern region of the Arctic Circle during the summer the sun does not hide for at least one day and during the winter the opposite effect occurs, this phenomenon can be seen increased in the amount of days as you go further from this line.

The arctic circle is the limit in the extreme south between the polar days d of the summer solstice and the polar nights of the winter solstice, within this imaginary line on the day of the summer solstice the Sun does not set for a period of 24 consecutive hours, while on the winter solstice the sun will not rise for the same period of time.

The latitude of this region is established by the inclination of the axis of rotation of the planet Earth with respect to the ecliptic (curved line where the Sun travels around the planet). Its angle is not consistent, since on the contrary it has a somewhat complicated movement which is related to several periods that go from short to very long, an example of this is one of the cycles that has the longest period of duration and consists of an approximate time of 41 years, with an extension of 2.4 ° which is equal to 267 kilometers in the most superficial part.

For its part, nutation (the name given to the oscillation movement of the terrestrial pole in relation to its location with the celestial sphere) is very similar to the movement made by spinning tops when they lose their power and therefore are about to stop, said oscillation causes the terrestrial poles to move approximately 9 seconds of arcs every certain time (18 and a half years) for this reason and due to said oscillation the inclination can be modified in approximately 280 meters in the crust during that period of time.