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Precession of the Equinoxes

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Over a period of nearly 26,000 years, the Earth's rotational axis moves in a circle with respect to the stars. This is known as precession. As a result, our current north star, Polaris, will appear to slowly drift and be replaced by a different north star.

Contributed by: Jeff Bryant (March 2011)
Open content licensed under CC BY-NC-SA

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