It is well known that a
variation in the direction of Earth’s
rotation axis is a real astronomical phenomenon, named nutation. It is interesting if a
variation of this axis can take place only in intensity, in the simplest
theoretical case of only two rigid body dynamics. This paper presents two
positions of the Moon during its monthly orbit, where a sudden variation of
Earth’s rotation axis in intensity
can take place. The duration of this phenomenon is limited in time, maybe an instant or a day,
and then a vortex can appear.
References
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Ciobanu, M.Z. (2021) About the Free and Forced Nutation: The Daily Nutation. American Journal of Astronomy and Astrophysics, 9, 18-21. https://doi.org/10.11648/j.ajaa.20210902.12
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