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The Moon landing

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oriel36

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Feb 22, 2024, 4:06:28 AMFeb 22
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The Moon has an ecliptic South Pole, but as it does not also rotate like the Earth, it does not have a daily rotational South Pole. When they say a spacecraft will land at the Moon's South Pole today, they mean the ecliptic South Pole.
https://upload.wikimedia.org/.../6/61/AxialTiltObliquity.png
Only the unthinking following Newton believe the Moon also rotates as it runs its monthly circuit of the Earth. Walk around a central object with an outstretched arm pointing at the centre, and this imitates the Moon's motion of the Earth and why we see the same side.
"The Sun and the Earth rotate on their own axes. The purpose of this motion is to confer motion on the planets located around them; on the six primary planets in the case of the Sun, and the Moon in the case of the Earth. On the other hand, the Moon does not rotate on the axis of its own body, as its spots prove " Kepler
Astronomy was taken over by mathematical theorists in the 17th century, so society today inherits stupid notions like a rotating Moon despite the fact we see the same side from the surface of a rotating Earth and its orbital motion.
It disrupts appreciation of the phases, including the dark phase (New Moon), and the motion of the Moon behind the Sun and its glare monthly and at a solar eclipse. The Neolithic people could appreciate celestial objects lost to the glare of the Sun periodically and it is hoped that eventually contemporaries do the same.

oriel36

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Feb 22, 2024, 6:16:20 AMFeb 22
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Briefly, the Moon acts like a car travelling around a traffic roundabout where the same side always faces the centre as a property of its orbital motion. Call it revolution.

There was a purpose in introducing Kepler's perspective on a non-rotating yet orbiting Moon as his Somnium work lends itself to misinterpretation on that account. His revolution is orbital motion and uses the poles of the ecliptic, which the Earth also has, as inferred by the ecliptic plane.

https://books.google.ie/books?id=OdCJAS0eQ64C&pg=PA80&lpg#v=onepage&q&f=false

The RA/Dec framework tries to dispense with the ecliptic poles and tries to gauge everything off the daily rotational characteristics on the Earth like so.

https://www.youtube.com/watch?v=WvXTUcYVXzI&t=104s

Contributors here should already see there are complex issues involved, and the least of them all is a discussion on the Moon's orbital motion of the Earth. The first Sun-centred astronomers worked off the ecliptic plane and poles rather than the clockwork solar system, which works off RA/Dec conceptions.

"The third movement is the declination movement. For the axis of daily rotation is not parallel to the axis of the great circle but is inclined to it by such a part of the circumference, which in our time is almost 23 and a half degrees. Thus, the Earth's centre always remains in the plane of the ecliptic, i.e. on the circumference of a great circle, and its poles revolve, drawing small circles on both sides around the centres equidistant from the axis of the great circle. This movement, too, takes place over almost a year and is almost equal to the revolution of the great wheel" Copernicus, Commentariolus.
All this becomes important when dealing with Kepler's representation of Mars over sixteen years and, once again, misinterpreted by a mathematician. It does involve what is called frames of reference in modern terminology.

https://en.wikipedia.org/wiki/Johannes_Kepler#/media/File:Kepler_Mars_retrograde.jpg


[ I imagined this would not be posted to Google Groups given that this discussion group is meant to be frozen in time.]
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