First of all the rotation axis ... wobble. Although it was already discovered by American astronomer Seth Carlo Chandler in 1891 the exact cause of this change of Earth’s spin with a period ...

This event is commonly called the "African Humid Period (AHP ... and a 20,000-year cycle in the "wobble" — much like a top wobbles — of the Earth's axis (precession). All three of orbital ...

Superimposed is a subtler wobble. The axis keeps steady in space, but over an uneven period of about one year, the bulk of the earth moves slightly in relation to the axis. Gold uses this motion ...

The “Chandler Wobble” – a natural shifting of the Earth’s axis as the planet is not perfectly ... think this could be the beginning of a new period of shorter days. Australian astronomer ...