science & space•Thu, September 3, 2026•4 min read

Saturn Just Developed a Mysterious 10-Sided Wave at Its South Pole

Researchers have discovered a massive, ten-sided atmospheric wave circling Saturn’s south pole. This unexpected decagon mirrors the planet’s long-standing northern hexagon but has experts questioning why it formed now.

A New Geometric Mystery in the Gas Giant

For decades, Saturn’s north pole has captivated astronomers with its stable, perfect hexagon—a six-sided jet stream pattern that has persisted since it was first spotted by Voyager spacecraft in the 1980s. Now, that northern curiosity has a southern counterpart. Researchers have officially identified a new, ten-sided wave structure, or 'decagon,' encircling Saturn’s south pole.

The discovery, published in the journal Science Advances, was made using the Hubble Space Telescope. Unlike the long-observed northern hexagon, this southern decagon appears to be a recent development, leaving planetary scientists scrambling to understand the mechanics behind its sudden appearance.

Hubble imagery reveals the distinct 10-sided wave pattern orbiting the southern pole of Saturn.

What We Know About the Decagon

The atmospheric structure is not just a localized storm; it is a sprawling, vertically extended wave that sits within one of Saturn’s powerful jet streams. Because it spans multiple layers of the atmosphere, researchers believe it is a deep-seated feature rather than just a shallow cloud formation.

It is a 10-sided (decagonal) wave structure.
The feature was identified using Hubble Space Telescope data from 2024 and 2025.
It is positioned within a high-speed jet stream at the planet's south pole.
Unlike the stable northern hexagon, this structure appears to have formed recently.

The most intriguing part to me is that this seems to have just formed recently. The question is, why did it suddenly form now when we haven’t seen one before?
— Amy, Researcher (via ESA Hubble)

Implications for Planetary Science

The emergence of the decagon highlights the dynamic and often unpredictable nature of gas giants. While computer models have helped us theorize how the northern hexagon maintains its shape, the appearance of a new, distinct polygon at the opposite pole suggests that the atmospheric processes on Saturn are far more complex than previously assumed.

Further investigation is already being planned. Scientists aim to leverage additional observations from the James Webb Space Telescope and advanced computer simulations to determine the decagon’s longevity and its relationship to the planet's overall atmospheric circulation. Until then, the southern pole remains one of the most enigmatic regions in our solar system.

Key Takeaways

A massive 10-sided atmospheric wave, or 'decagon,' has been discovered at Saturn's south pole.
The discovery was made using Hubble Space Telescope data gathered in 2024 and 2025.
The feature is a vertically extended wave embedded within a powerful jet stream.
Scientists are currently investigating why the structure formed only recently.
Future studies will involve the James Webb Space Telescope to better understand the decagon's evolution.

FAQ

What is the decagon found on Saturn?

It is a 10-sided wave pattern discovered in the atmosphere at Saturn's south pole.

Is the decagon the same as the hexagon on Saturn's north pole?

No, they are different structures. The hexagon has been known since the 1980s, while the decagon appears to be a new, recently formed feature.

How did scientists find this wave?

Researchers identified the structure using high-resolution images captured by the Hubble Space Telescope.

Why is the discovery of the decagon significant?

It provides new insights into the complex atmospheric dynamics of Saturn and challenges existing models of how such regular-sided wave patterns form.