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Author Topic: How does the moon stabilise the Earth's rotation?  (Read 1194 times)

Offline chris

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Many people suggest that the Earth owes its stable, life-nurturing environment to the presence of the moon. But how does the Moon do this?

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Offline Soul Surfer

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How does the moon stabilise the Earth's rotation?
« Reply #1 on: 11/03/2010 23:43:51 »
The earth is an oblate spheroid with an equatorial bulge.  The orbit of the moon is in the plane of the ecliptic i.e. in line with the planets and the equator of the sun this means that there is a small force from the moon tending to pull the rotation earth into the plane of the ecliptic.  This causes the earth's polar inclination to precess regularly every 25,000 years.  The absence of this steady force would allow the earth's polar inclination tp change by a much greater amount like mars which is predicted to change in polar inclination by a large amount over millions of years
 

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How does the moon stabilise the Earth's rotation?
« Reply #2 on: 12/03/2010 08:45:21 »
Thank you.
 

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How does the moon stabilise the Earth's rotation?
« Reply #2 on: 12/03/2010 08:45:21 »

 

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