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The Last 100 Days of the Mayan Calendar

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Listeners have e-mailed their questions, comments and concerns regarding December 21, 2012.

Precession of the Equinoxes

Since the rotation axis is precessing in space, the orientation of the Celestial Equator also precesses with the same period. This means that the position of the equinoxes is changing slowly with respect to the background stars. This precession of the equinoxes means that the right ascension and declination of objects changes very slowly over a 26,000 year period. This effect is negligibly small for casual observing, but is an important correction for precise observations. 

 

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