Is Nutation explained in the tychos

I have what may be another silly question.

How does the Tychos deal with nutation. The slight “nodding” of the so called, (but as we know) non-existent wobble?
Is there an observable nodding and if
so why?

Dear MUU,

Here’s from the Encyclopaedia Britannica:

nutation , in astronomy, a small irregularity in the precession of the equinoxes. Precession is the slow, toplike wobbling of the spinning Earth, with a period of about 25,772 years. Nutation (Latin nutare , “to nod”) superimposes a small oscillation, with a period of 18.6 years and an amplitude of 9.2 seconds of arc, upon this great slow movement.”

Of course, the TYCHOS rejects the wobbling theory of the Earth’s axis - as an explanation for the precession of the equinoxes (which is simply caused by the Earth’s 25344-year path around its PVP orbit). As for the so-called nutation, it is clearly connected to our Moon - and doesn’t imply any wobbling of the Earth’s axis either…

Here’s from the Wikipedia: “The largest component of Earth’s nutation has a period of 18.6 years, the same as that of the precession of the Moon’s orbital nodes:”

In other words, the observed nutation is a very small oscillation entirely related to the Moon’s orbital motion - and the TYCHOS model has no issues with that.

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