Source report. Hubble observations trace an atmospheric wave that differs from the planet’s familiar northern hexagon.
Source: NASA / Hubble. Original source published 2 September 2026. Published on Alder Atlas: 14 September 2026.
A changing polar pattern
NASA has described a ten-sided atmospheric pattern around Saturn’s south pole, drawing on Hubble observations from 2023 onwards and later observations from the ground. The research, reported on 2 September, appears in Science Advances.
Weather with a geometric outline
The decagon is a pattern in the atmosphere, not a solid feature on the planet. It is distinct from the long-observed hexagon around Saturn’s north pole. Tracking its evolution gives researchers another way to investigate how large atmospheric waves behave.
The value of returning
A single striking picture would reveal an outline but little about how it develops. Repeated observations make it possible to distinguish a persistent structure from a temporary appearance. The developing southern pattern therefore adds a time dimension to the familiar images of Saturn, while leaving its future evolution open.
Sources & further reading
This is an independently worded, source-based report prepared with AI assistance for the Alder Atlas editorial project. It is not first-hand reporting.