https://en.wikipedia.org/wiki/Arctic_Circle#/media/File:Arctic_circle.svg
As the North Pole ( and the entire surface) rotates parallel to the orbital plane as a function of the Earth's orbital motion, the distance between the North Pole and the dark hemisphere begins to shrink and with it the circumference where the Sun
remains constantly in view, slowly at first but with increasing contraction over the next few months towards the September Equinox.
After the September Equinox when the North Pole passes through the planet's divisor and into the dark hemisphere of the Earth, an increasing circumference where the Sun remains out of view will take its place.
It takes two surface rotations to explain the seasons and from there into the traits of planetary climate. Experimental theorists can't handle cyclical motions so in the absence of inspirational qualities found in solar system and Earth science research,
they resort to dire conclusions.
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