From Newsgroup: sci.astro.amateur
https://gml.noaa.gov/obop/spo/livecamera.html
The single sunset at the South Pole is fast approaching as that latitude passes from the light into the dark hemisphere for the next six months.
It was not possible to propose this rotation within the Ptolemaic framework, as Copernicus tried, and Galileo considered it a type of rest rather than a rotation.
"From what I see, did not understand very well- was a certain experiment which I exhibited to some gentlemen there at Rome in partial explanation and partial refutation of the "third motion" attributed by Copernicus to the Earth. This extra rotation, opposite in direction to all other celestial motions, appeared to many to be the most improbable thing and one that upset the whole Copernican system. What I said was designed to remove a difficulty attributed to the Copernican system, and I later added that anyone who would reflect upon the matter more carefully would see that Copernicus had spoken falsely when he attributed his "third motion" to the Earth since this would not be a motion at all, but a kind of rest. " Galileo, The Assayer
It is time to revisit the cause of the seasons and extend it to planetary climate.
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