Saturn decagonal wave observed
- The Hindu Science reported today that researchers observed a decagonal wave pattern in Saturn's atmosphere during recent analysis, the post said publicly. - Researchers' data showed tenfold symmetry forming a roughly ten-sided atmospheric wave structure, described in the social post as a 'decagon' pattern term. - Researchers shared images on X; the post date was Sept. 8, 2026, per the Hindu Science account. (x.com)
Researchers are reporting a new polygon in Saturn’s atmosphere: a 10-sided wave wrapped around the planet’s south pole. NASA and ESA said recent Hubble observations revealed a giant, evolving atmospheric wave with tenfold symmetry, and the results were published in *Science Advances* on Sept. 2. (science.nasa.gov) That matters because Saturn was already famous for a different geometric jet pattern — the long-lived hexagon at its north pole. Amy Simon, a co-author and principal investigator for Hubble’s Outer Planet Atmospheres Legacy program at NASA’s Goddard Space Flight Center, said researchers had “never seen anything quite like this” in Saturn’s southern hemisphere and that the new feature appears to be strengthening. (esa.int) Here’s the basic picture. The new structure is not a solid object and not a ring. It is a wave pattern embedded in one of Saturn’s jet streams, forming a roughly decagonal outline around the south pole. NASA and ESA said observations indicate the feature extends through multiple layers of Saturn’s atmosphere, which suggests it is a vertically extended structure rather than just a cloud-top oddity. (science.nasa.gov) The discovery appears to have come together in stages. ESA said researchers pieced together Hubble observations dating back to 2023, found clearer hints in 2024 and 2025, and combined those data with ground-based images. Agustín Sánchez-Lavega of the University of the Basque Country, the study’s lead author, said researchers had been searching Hubble images for a southern counterpart to Saturn’s northern hexagon since 1990, while Cassini images from 2004 to 2017 had shown no sign of a long-lived formation there. (esa.int) Amateur astronomers also played a role. ESA said Trevor Barry and Jean-Paul Oger were among the observers who noticed a subtle undulating band in ground-based images in 2024, before Hubble’s sharper space-based view helped define the pattern more clearly. That mix of amateur observations and Hubble follow-up is part of why scientists can now say the feature seems to have emerged recently, rather than being a stable structure seen for decades. (esa.int) One reason the finding drew attention on Sept. 8 is that *The Hindu* included Saturn’s “decagonal wave” in a science roundup, and the outlet’s science account posted images publicly on X the same day. The core reporting, though, traces back to the Sept. 2 NASA and ESA releases tied to the *Science Advances* paper. (thehindu.com) What scientists do not have yet is a settled explanation. ESA said the decagon looks similar to the northern hexagon but is also “distinctly different,” and researchers are still tracking how it forms and evolves. For now, the clearest takeaway is narrow: Hubble has captured a new, ten-sided atmospheric wave at Saturn’s south pole, and astronomers now have a chance to watch whether it persists, strengthens or changes in the coming years. (esa.int)
