Which planet rotates so fast that its day is only 10 hours long?
Jupiter, often called the King of the Planets, is the largest planet in our solar system and fifth from the sun. Like the rest of the Gaseous planets, Jupiter is composed primarily of the gases hydrogen and helium and has no solid surface. Jupiter is unique, however, in the fact that it gives off more energy than it receives from the Sun. 1,000 km beneath Jupiter’s cloud tops, the enormous pressure turns the hydrogen gas into liquid hydrogen. Jupiter spins so fast (its day is the shortest of all the planets, at ten hours) that its liquid mass bulges outward at the equator. The temperature at Jupiter’s cloud tops is -148 C. Jupiter is also known for its storms; the Great Red Spot is the center of a storm system that was first seen more than 300 years ago. Viewed from Earth, Jupiter is the fourth brightest object in the sky after the Sun, the Moon, and Venus. Jupiter’s year is 11 years and 314.96 days long and with it on its huge orbit it drags at least 16 moons. The largest four are Eur
