what is the precession cycle
Next is precession, or wobble. This cycle occurs every 26,000 years. This gyroscopic wobble of the earths axis is driven by tidal forces which are influenced by our sun and moon. The Earth is actually not perfectly round so the gravitational pull tugs the axis over time creating the wobble cycle. Now there's a technical term for you.
Main article: Axial precession. Axial precession is the movement of the rotational axis of an astronomical body, whereby the axis slowly traces out a cone. In the case of Earth, this type of precession is also known as the precession of the equinoxes, lunisolar precession, or precession of the equator.