The Saturn 10-sided shape appears around the planet’s southern polar region. A strange geometric pattern is emerging around Saturn’s south pole. New observations from NASA’s Hubble Space Telescope reveal a giant, evolving 10-sided atmospheric wave—and scientists are getting a rare opportunity to watch the feature develop.
Saturn is already famous for its spectacular rings and its bizarre northern polar hexagon. Now, astronomers have found something remarkably different on the other side of the planet.
Recent Hubble observations reveal a 10-sided atmospheric pattern, known as a decagon, surrounding Saturn’s south pole.
It is not a giant solid object, artificial structure, or permanent feature sitting above Saturn. Instead, scientists believe the shape is produced by the complex motion of gases and waves inside Saturn’s atmosphere.
What makes the discovery particularly interesting is that the feature appears to have strengthened over time. Researchers have traced evidence of the pattern back to Hubble observations from 2023, giving them an unusual chance to study a giant atmospheric structure while it develops.
Saturn 10-Sided Shape Explained
Hubble observations reveal an evolving atmospheric pattern around Saturn’s south pole. Here’s the discovery at a glance.
Hubble Observes
Hubble tracks Saturn’s southern polar atmosphere as the region becomes easier to observe.
Pattern Emerges
Observations dating back to 2023 reveal an unusual atmospheric boundary.
Ten Sides Appear
The boundary forms a recognizable decagonal pattern around the south pole.
Atmospheric Waves
The feature is linked to atmospheric motion and a powerful jet-stream system.
Scientists Investigate
Researchers are studying why the pattern has this unusual geometry and how it will evolve.
⬡ Saturn’s North Pole
The famous six-sided hexagon is a long-lived atmospheric feature that has been observed for decades.
⬢ Saturn’s South Pole
The newly observed decagon is a different atmospheric pattern that appears to be evolving.
Saturn’s strange atmosphere is another reminder that space is full of discoveries that can challenge what scientists expect to see. If you enjoy following unusual developments in space exploration, you can also read our report on the NASA Crew-13 launch delay after a SpaceX Dragon propulsion-system leak, where engineers had to investigate an unexpected spacecraft problem before astronauts could fly.
For another look at how scientists reconstruct extraordinary natural events, explore our Nepal–Tibet Flash Flood 2026 investigation, which examines the suspected glacier collapse and the chain of events that turned it into a devastating Himalayan flood.
Sources
- NASA: Hubble Tracks New Decagon Encircling Saturn’s South Pole
- NASA APOD—September 8, 2026: Hubble Decagon Around Saturn’s South Pole
- ESA: Hubble Tracks New Decagon Encircling Saturn’s South Pole
- NASA: Decagon on Saturn’s South Pole — Color Image
- ESA: Decagon on Saturn’s South Pole — Single Filter Image
- ESA: Decagon on Saturn’s South Pole — Colour Image
