This is an example of an astronomical theme which emerges from known observations and a number of unanswered questions.
In this case, how come the North pole on the surface of the Earth, where daily rotation is absent, maintains the same orientation in space throughout an orbit of the Sun yet experiences a single day/night cycle throughout the year?.
A 'tilting' Earth would change the orientation to Polaris, so rather than focus on tilting towards and away from the Sun, in only the briefest glimpse one Saturday afternoon, the idea of another surface rotation emerged. It then became a leisurely
endeavour to build up a picture of that rotation as a function of orbital motion along with all the effects that go along with two surface rotations acting in combination.
Uranus provided an exceptional step in creating that visual narrative-
https://www.youtube.com/watch?v=612gSZsplpE
With the radius between the North pole and the dark hemisphere starting to expand where the Sun constantly remains in view until its maximum circumference on the June Solstice as the surface of the Earth slowly turns parallel to the orbital plane, it is
lovely to consider how astronomical compositions are much like musical compositions along with all the enjoyment it brings.
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