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Blakut

02 Ian 2009 12:49



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Am pus o imagine cu precesia, asa cum am inteles-o eu. Daca e corecta, de acolo se observa de ce ar trebui ca axa in jurul careia se face precesia nu este in lungul campului gravitational.

edit:
Plus am mai gasit asta:
http://upload.wikimedia.org/math/c/f/8/cf8e77f2b5ddbad563e8ba4e5c3b5a4d.png
    Gm = standard gravitational parameter of the perturbing body
    r = geocentric distance to the perturbing body
    C = moment of inertia around Earth's axis of rotation
    A = moment of inertia around any equatorial diameter of Earth
    C−A = moment of inertia of Earth's equatorial bulge (C>A)
    δ = declination of the perturbing body (north or south of equator)
    α = right ascension of the perturbing body (east from vernal equinox)
edit 2: merita citita toata asta
http://en.wikipedia.org/wiki/Precession_of_the_axis#Cause