**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.

In astronomy, "precession" refers to any of several slow changes in an astronomical body's rotational or orbital parameters, and especially to the Earth's precession of the equinoxes. See Precession (astronomy).

Read more about Precession: Torque-free, Torque-induced, Astronomy

### Other articles related to "precession, precessions":

**Precession**

... In celestial mechanics, perihelion

**precession**, apsidal

**precession**or orbital

**precession**is the

**precession**(rotation) of the orbit of a celestial body ...

**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 ellipse ... 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 ... (the periapsis and apoapsis, respectively) apsidal

**precession**corresponds to the rotation of the line joining the apsides ...

**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 ... 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 ...

**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**...

... of low noise diode lasers to polarize and monitor spin

**precession**... An orthogonal probe beam detects the

**precession**using optical rotation of linearly polarized light ... In a typical SERF magnetometer, the spins merely tip by a very small angle because the

**precession**frequency is slow compared to the relaxation rates ...

### 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)