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How do the moon's & earth's orbital planes intersect?

  1. Dec 31, 2005 #1

    -Job-

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    Consider the earth's orbit around the sun to be in a plane A and the moon's orbit around the earth to be in a plane B. How do these planes intersect? Are they parallel or perpendicular? At what angle do they intersect themselves? Does the angle stay the same, or does it vary.
     
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  3. Dec 31, 2005 #2

    tony873004

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    The Moon's orbit is inclined roughly 5 degrees to the ecliptic. The ecliptic is defined to be the plane of the Earth's orbit. The orientation rotates one complete revolution every 18+ years. The argument of perigee rotates one complete revolution every ~9 years. Click the link for an animation. This is viewed from the ecliptic, so if it were shown, the Earth's orbital plane would be a horizontal line through the center of the Earth.

    http://www.orbitsimulator.com/gravity/saros.GIF
     
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