Astrophysics

    

Precession of the Equinoxes

Authors: Nainan K. Varghese

Wobbling, caused by slow continuous change in the orientation of earth’s apparent rotational axis, is called ‘precession of the equinoxes’. Rotation of earth is an apparent motion only with respect to its central axis. Deflection of earth’s apparent rotational axis is caused by shift in its center of gravity from its geometrical centre due to non-uniform distribution of its 3D matter-content rather than by precession due to its apparent spin motion. Deflections of earth’s apparent spin axis, caused by the northward shift of its center of gravity, during earth’s orbital path on either side of the Sun’s mean path are in opposite directions and hence the resultant magnitude of deflection depends on eccentricity of earth’s apparent elliptical orbit around the sun.

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[v1] 2022-01-18 04:03:34

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