The dynamics of the Earth-Moon system is quite different from the Sun-Earth system especially after a long duration for the gravitational attraction of the Sun.

And we are acutely aware of the dynamics of the Earth wobble, which can switch into and out of an opposition lean quickly as well as go back and forth in a daily polar wobble.

The coupling between the element geochemical behavior and the tectonic dynamics of the Earth the theoretical basis for understanding the geochemical response of tectonic opening-closing.