Axial Precession
Axial precession is the gradual shift in the orientation of an astronomical body's rotational axis. For Earth, this means that the axis wobbles over time, tracing a circular path. This phenomenon occurs due to gravitational forces exerted by the Sun and Moon on Earth's equatorial bulge, causing the axis to change its direction.
The cycle of axial precession takes about 26,000 years to complete. This movement affects the position of the North Star and can influence climate patterns over long periods. Understanding axial precession helps scientists study Earth's past climate and predict future changes.