Hubble Images Uncover Massive 10-Sided Wave Brewing at Saturn's South Pole

A striking 10-sided weather pattern, dubbed a decagon wave, has been observed at Saturn’s stormy south pole by the Hubble Space Telescope. Researchers from the University of the Basque Country are intrigued by this geometric structure, as it marks the first time such a formation has been detected at the icy planet’s southern hemisphere.

The discovery came to light in 2023 when the Hubble captured red-filtered images revealing the unusual shape in Saturn's south pole region. This is a stark contrast to the hexagon wave, a stable 6-sided feature that has been locked in Saturn's north pole jet stream for over 40 years since its first discovery by NASA's Voyager missions in 1980.

Scientists are eager to understand the similarities and differences between the two patterns, with the decagon wave currently appearing to evolve and strengthen. The researchers believe the wave may have been triggered by a disturbance in Saturn’s jet stream or a nearby swirling vortex near a storm system. These atmospheric conditions seem to allow the formation of these complex patterns on Saturn, which contrasts with Earth's more chaotic weather system.