Saturn’s hexagon is a persisting six sided cloud pattern around the north pole of the planet. It is created by a band of upper-atmospheric winds, and the sides of it are about 13,800 km (8,600 mi) long, which is longer than the Earth’s diameter. There’s a hurricane swirling within the hexagon.
Saturn’s bright satellite Enceladus is covered with water ice that reflects almost all the Sun’s light back into space.
The geologically active moon, discovered in 1789 by William Herschel, has craters, ridges and smooth plains. Most spectacularly, Enceladus has geysers that spew frozen water thousands of kilometres into space.
An animation of the hexagonal storm present on Saturn’s north pole. The hexagon is 30,000 kilometers across and has constant winds of more than 300 kilometers per hour. Images acquired by the Cassini spacecraft on December 10th, 2012.