Saturn's hexagon
Saturn's hexagon is a persistent approximately hexagonal cloud pattern around the north pole of the planet Saturn, located at about 78°N. The sides of the hexagon are about 14,500 km (9,000 mi) long, which is about 2,000 km (1,200 mi) longer than the diameter of Earth. The hexagon is around 300 km (190 mi) high, and may be a jet stream made of atmospheric gases moving at 320 km/h (200 mph).