# rotation

In physics, rotation is the turning or spinning of a body, such as a planet, star, or galaxy, about an axis running through it. See also rotational period.

In mathematics, rotation is a transformation in which a figure turns through a specific angle about a fixed point,
called the **center of rotation**. The center of rotation
may be inside or outside the figure that is being transformed. If the
figure is turned anticlockwise, the rotation is considered positive,
while a negative rotation turns the figure clockwise.