Axial precession: End of a long cycle and Climate Change

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The tilting of the earth changes everything” … natural planetary warming and cooling periods based on the position of the earth and its axis in relationship to the sun. ”

In astronomy, axial precession is a gravity-induced, slow, and continuous change in the orientation of an astronomical body’s rotational axis. In particular, it can refer to the gradual shift in the orientation of Earth’s axis of rotation in a cycle of approximately 25,772 years.

This is similar to the precession of a spinning-top, with the axis tracing out a pair of cones joined at their apices. The term “precession” typically refers only to this largest part of the motion; other changes in the alignment of Earth’s axis—nutation and polar motion—are much smaller in magnitude.

Earth’s precession was historically called the precession of the equinoxes, because the equinoxes moved westward along the ecliptic relative to the fixed stars, opposite to the yearly motion of the Sun along the ecliptic.

Historically, the discovery of the precession of the equinoxes is usually attributed in the West to the 2nd-century-BC astronomer Hipparchus.

Wikipedia

 

 

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