I have been told the effects of their spinning, but never why they spin in the first place. — Carson Lee Fifer Jr., Alexandria, Va. A: To answer this question, it helps to picture a game of pool. read more
Planets form from material in this disk, through accretion of smaller particles. In our solar system, the giant gas planets (Jupiter, Saturn, Uranus, and Neptune) spin more rapidly on their axes than the inner planets do and possess most of the system's angular momentum. read more