The Earth's rotation is about to accelerate significantly. According to scientists, July 9, July 22, and August 5 of this year will be some of the shortest days in recent memory as a result, slicing ...

Tracking the rotation speed of solid planets, like the Earth and Mars, is a relatively simple task: Just measure the time it takes for a surface feature to roll into view again. But giant gas planets ...

The familiar 24‑hour day is based on how long it takes the Sun to return to the same position in our sky, not on an absolutely constant spin rate.

Every second, the Earth spins at an incredible speed, completing a full rotation in just 24 hours. While this may seem ...