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The Epic Interactive Encyclopedia 1998
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Epic Interactive Encyclopedia, The - 1998 Edition (1998)(Epic Marketing).iso
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Precession
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INFOTEXT
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1992-09-03
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265b
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Precession is a slow wobble of the Earth on
its axis, like that of a spinning top. The
gravitational pulls of the Sun and Moon on
the Earth's equatorial bulge cause the
Earth's axis to trace out a circle on the sky
every 25,800 years.
Subject by: Vince Pike