What long-term, slow wobble of the Earth's axis takes approximately $26,000$ years to complete a cycle?

Answer

Precession

Precession is a slow wobbling motion of the Earth's axis, caused by gravitational forces acting on the equatorial bulge, spanning a cycle of roughly 26,000 years.

What long-term, slow wobble of the Earth's axis takes approximately $26,000$ years to complete a cycle?
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