PRECESSION

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PRECESSION

• web-help

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A Spinning Top
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That Motion is Called Precession
AXIS
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But what causes this motion?
gravity
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gravity
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North Celestial Pole
25,600 YEARS
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Spring
Precession
Winter
DAY
Summer
Fall
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Precession of the Equinoxes
Spring
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Spring Equinox
1 AD
2500 AD
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Things get a little bit trickier
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