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The influence of tidal energy losses upon a planet's rotation rate and upon the tilt of its axis is re-examined for a range of assumptions concerning the tidal retarding torques. In the case of the earth-moon system or similar systems, regardless of the type of the tidal loss-function, the component of the planet's angular velocity normal to the orbital plane of the satellite decreases almost as the square of the component parallel to this plane. The result is a continual tilting of the axis of spin into the plane of the orbit. Numerical results are presented for three assumed types of tidal retarding torques.
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Louis B. Slichter (1963) studied this question.
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