The term precession of the equinoxes refers to the fact
Chapter , Problem 83(choose chapter or problem)
The term precession of the equinoxes refers to the fact that Earths spin axis does not stay fixed but sweeps out a cone once every (This explains why our pole star, Polaris, will not remain the pole star forever.) The reason for this instability is that Earth is a giant gyroscope. The spin axis of Earth precesses because of the torques exerted on it by the gravitational forces of the Sun and moon. The angle between the direction of Earths spin axis and the normal to the ecliptic plane (the plane of Earths orbit) is 22.5 degrees. Calculate an approximate value for this torque, given that the period of rotation of Earth is and its moment of inertia is
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