What the Heck? Another Perfect Geometric Shape Has Been Detected on Saturn

Astronomers using the Hubble Space Telescope identified a decagonal cloud pattern near Saturn’s south pole, each side about 16,800 km long, with a surrounding jet stream reaching 116 m s−1 while the polygon itself drifts at only 2.5 m s−1. The feature, first hinted by ground-based observations and traced to 2023 images, became clearly defined by 2025, joining the planet’s northern hexagon as a rare atmospheric wave confined by jet streams.