Precession of a gyroscope
Sphere rotating around one of its diameters
The response of a rotating system to an applied torque. When the device swivels, and some roll is added, the wheel tends to pitch.
An example of rotation. Each part of the worm drive—both the worm and the worm gear—is rotating on its own axis.
Apsidal precession—the orbit rotates gradually over time.

In an appropriate reference frame it can be defined as a change in the first Euler angle, whereas the third Euler angle defines the rotation itself.

- Precession

The fixed-axis hypothesis excludes the possibility of an axis changing its orientation and cannot describe such phenomena as wobbling or precession.

- Rotation around a fixed axis
Precession of a gyroscope

2 related topics


Rotation, precession, and nutation in obliquity of a planet


Rotation, precession, and nutation in obliquity of a planet
Yearly changes in the location of the Tropic of Cancer near a highway in Mexico

Nutation is a rocking, swaying, or nodding motion in the axis of rotation of a largely axially symmetric object, such as a gyroscope, planet, or bullet in flight, or as an intended behaviour of a mechanism.

However, in spacecraft dynamics, precession (a change in the first Euler angle) is sometimes referred to as nutation.

A sphere rotating (spinning) about an axis


A sphere rotating (spinning) about an axis
Rotation (angular displacement) of a planar figure around a point
Rotational Orbit v Spin
Relations between rotation axis, plane of orbit and axial tilt (for Earth).
Star trails caused by the Earth's rotation during the camera's long exposure time.
Euler rotations of the Earth. Intrinsic (green), Precession (blue) and Nutation (red)
The principal axes of rotation in space

Rotation is the circular movement of an object around an axis of rotation.

Another consequence of the rotation of a planet is the phenomenon of precession.