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physical phenomena > process > physical process > motion > axis motion > precession > general precession |
general precession comparison table |
Subject | has rate | is an instance of | is a kind of | has definition |
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precession | axis motion | The uniformly progressing motion of the pole of rotation of a freely rotating body undergoing torque from external gravitational forces. In the case of the Earth, the component of precession caused by the Sun and Moon acting on the Earth's equatorial bulge is called lunisolar precession; the component caused by the action of the planets is called planetary precession. The sum of lunisolar and planetary precession is called general precession. (See nutation.) | ||
general precession | 50".27 per year | precession | The sum of the lunisolar and the planetary precession. It causes the ecliptic longitude to increase at a constant rate but has no effect on ecliptic latitude. |
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