Saturn's north pole features a striking, persistent hexagonal cloud pattern roughly 14,500 km across, with sides longer than Earth's diameter, driven by a jet stream moving at 320 km/h. Discovered from Voyager flyby data in 1981 by David Godfrey and later studied by the Cassini mission in 2006, this hexagon rotates with a period of 10h 39m 24s, matching Saturn's internal radio emissions. Between 2012 and 2016, Cassini observed the hexagon change from blue to golden, likely due to seasonal sunlight creating haze, while the south pole lacks a hexagon but has a decagon-shaped wave. Scientists have proposed several explanations, including Rossby waves and Oxford University lab experiments showing that rotating fluids at different speeds create stable polygonal vortices. A 2020 Caltech mathematical study suggests the North Polar vortex is crucial for stabilizing the jet, though the exact mechanism remains a fascinating atmospheric mystery.