Scientists have identified a previously unseen 10-sided wave pattern in the atmosphere of Saturn’s South Pole, marking a significant addition to the planet’s known atmospheric phenomena. This decagonal structure was detected in recent images as Saturn’s southern hemisphere transitions out of a prolonged winter period.

The discovery offers a contrast to an earlier well-documented feature—a hexagonal wave encircling Saturn’s North Pole observed by NASA’s Voyager 1 and 2 spacecraft during their flybys in 1980 and 1981. The North Polar Hexagon has been extensively studied as a stable and long-lasting atmospheric pattern.

Professor Leigh Fletcher, who contributed to the research published in the journal Science Advances, noted the rare timing and conditions surrounding the new observation. He explained that Saturn’s southern hemisphere had been shrouded in winter darkness for over a decade, and the emergence of this complex ten-sided wave suggests significant atmospheric changes during that period. According to Fletcher, the unfolding of this striking new shape around the South Pole indicates dynamic shifts as the hemisphere moves into seasonal change.

The 10-sided atmospheric feature adds valuable insight into the meteorological activity and climate behavior on Saturn, expanding understanding beyond the previously known polar hexagon. The observation underscores the planet’s complex atmospheric dynamics and their responsiveness to seasonal variations.

Researchers continue to analyze the characteristics and underlying mechanisms of the decagonal wave to determine how it forms and evolves compared to the hexagonal pattern in the northern hemisphere. The findings may contribute to broader knowledge of planetary atmospheres and the processes driving such intricate wave structures on gas giants.