Hubble discovers mysterious 10-sided wave forming on Saturn

The Hubble telescope detected a large atmospheric wave with 10 sides at Saturn's south pole, the first such structure in the planet's southern hemisphere. It resembles Saturn's northern hexagon but differs from it and, based on data since 2023, is strengthening. The results were published in Science Advances.

• Wave embedded in a powerful jet stream and spans several atmospheric layers
• Faint signs seen in 2024 ground images; Hubble confirmed data from 2023
• Saturn's northern hexagon observed for over 40 years; no southern analog before
• Cause of the decagon and its lifespan remain unknown