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Graph of the precession of the equinox



This graph shows the precession of the equinox over the last 750,000 years. The precession is expressed as the longitude of the perihelion from the vernal equinox. The blue line traces the precession; the orange line shows today's value for comparison. The data are from Berger and Loutre (1991).
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http://www.museum.state.il.us/exhibits/ice_ages/precession_graph.html, Last modified August 30th 2007, 02:59PM.