Many incompetents who try to comment on this topic will pass off into oblivion having not passed through life enjoying what is in front with them, especially with all the benefits of imaging and technology. The outward appearance of stability which once was Royal Society empiricism suddenly becomes exposed as a pivoting circle of illumination as a function of RA/Dec.

The cause of the 24 hour day/night cycle is intrinsic rotation with a maximum equatorial speed of 1037.5 miles per hour while the seasons are a combination of rotations - the normal 24 hour rotation in combination with the surface rotation as a function of the Earth's orbital motion, the latter easily understood as the Polar day/night cycles at the North/South poles.

https://www.usap.gov/videoclipsandmaps/spwebcam.cfm

The area where the Sun is constantly in view is down to roughly 1,587 miles from a maximum area of 3,105 miles on the December Solstice and on the March Equinox that distance will reduce to zero as the Sun goes out of sight for the one and only time in 2018 at the South pole.

For people to research the Polar day/night cycle in any meaningful way, the notion of axial precession has to give way to the surface rotation as a function of the annual orbital motion of the Earth. While most people have no respect for themselves and will leave the Earth this way, the option is not to suffer a pivoting circle of illumination but to get stuck into the cause of the Polar day/night cycle as a prelude for researching climate, the seasons, orbital speed variations and multiple other topics.

Wish the nuisances would stick with discussing cars, bicycles and telescopes but this is an unmoderated forum after all and that is unavoidable.