Other forms: Earth's rotations
Earth's rotation is the spin of our planet on its axis. From the perspective of Polaris, also known as the North Star, Earth's rotation is counterclockwise.
Polaris is almost perfectly aligned with Earth's axis, the imaginary line running straight through the middle of the planet from the North Pole to the South Pole. Earth's rotation is simply its constant turning around this line. One complete spin takes one day, or about 24 hours, though this rotation is slowing over time, gradually increasing the length of a day by roughly two milliseconds per century. At the equator, the surface moves at more than 1,040 miles per hour, but our bodies can't perceive how fast we're spinning in space.