## Precession

**Precession** is a change in the orientation of the rotational axis of a rotating body. It can be defined as a change in direction of the rotation axis in which the second Euler angle (nutation) is constant. In physics, there are two types of precession: torque-free and torque-induced.

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### Some articles on precession:

Astronomy - Perihelion

... This is called perihelion

**Precession**... This is called perihelion

**precession**or apsidal**precession**... Discrepancies between the observed perihelion**precession**rate of the planet Mercury and that predicted by classical mechanics were prominent among the forms of ... See also nodal**precession**...Apsidal

... In celestial mechanics, perihelion

**Precession**... In celestial mechanics, perihelion

**precession**, apsidal**precession**or orbital**precession**is the**precession**(rotation) of the orbit of a celestial body ...SERF - Typical Operation

... lasers to polarize and monitor spin

... lasers to polarize and monitor spin

**precession**... An orthogonal probe beam detects the**precession**using optical rotation of linearly polarized light ... SERF magnetometer, the spins merely tip by a very small angle because the**precession**frequency is slow compared to the relaxation rates ...Two-body Problem In General Relativity - Historical Context - Apsidal

... See also Apsidal

**Precession**... See also Apsidal

**precession**and Laplace–Runge–Lenz vector If the potential energy between the two bodies is not exactly the 1/r potential of Newton's gravitational law but differs only slightly, then the ... This apsidal**precession**is observed for all the planets orbiting the Sun, primarily due to the oblateness of the Sun (it is not perfectly spherical) and the attractions of the other planets for ... (the periapsis and apoapsis, respectively) apsidal**precession**corresponds to the rotation of the line joining the apsides ...Lense–Thirring

... Therefore the Earth introduces a

**Precession**- Derivation... Therefore the Earth introduces a

**precession**on all gyroscopes in a stationary system surrounding the Earth ... This**precession**is called the Lense–Thirring**precession**with a magnitude As an example the latitude of the city of Nijmegen in the Netherlands is used for reference ... This latitude gives a value for the Lense–Thirring**precession**of The total relativistic**precessions**on Earth is given by the sum of the De Sitter**precession**and the Lense–Thirring**precession**...### More definitions of "precession":

- (
*noun*): The motion of a spinning body (as a top) in which it wobbles so that the axis of rotation sweeps out a cone.

### Famous quotes containing the word precession:

“But how is one to make a scientist understand that there is something unalterably deranged about differential calculus, quantum theory, or the obscene and so inanely liturgical ordeals of the *precession* of the equinoxes.”

—Antonin Artaud (1896–1948)