Former Australian Miner Co-Authors World-First Discovery of 10-Sided Atmospheric Wave on Saturn

An unusual feature spotted on Saturn from an amateur astronomer's backyard in Australia has helped guide researchers to the identification of a massive, 10-sided atmospheric wave situated around the planet's south pole. Trevor Barry, a former miner residing in Broken Hill, New South Wales, was observing Saturn using his homemade backyard observatory when he detected an unusual ripple in 2024. According to The Times of India, his initial findings became a crucial component of a broader international research effort that eventually confirmed the geometric structure using historical and ongoing observations from NASA's Hubble Space Telescope. The scientific findings were officially published in the journal Science Advances, with NASA noting that the feature marks the first large, regular-sided jet pattern identified within Saturn's southern hemisphere.

Barry has spent decades observing the night sky and capturing planetary images from his Broken Hill observatory since the early 2000s. His routine monitoring of Saturn took a significant turn in 2024 when he spotted a subtle ripple developing across the southern polar region. He chose to share his ground-based findings with Agustín Sánchez-Lavega, a researcher at the University of the Basque Country in Spain, with whom Barry had collaborated since 2008. While Barry initially characterized the anomaly simply as a ripple, Sánchez-Lavega recognized its potential scientific significance and encouraged him to maintain his monitoring schedule.

Although Barry's backyard equipment could not independently establish the definitive nature of the atmospheric feature, his data supplied a vital evidentiary piece that could be cross-referenced with professional astronomical instrumentation. The collaborative research team also incorporated observations from French amateur astronomer Jean-Paul Oger. Like Barry, Oger contributed ground-based data through the Planetary Virtual Observatory Laboratory, an academic platform operated by the University of the Basque Country designed to aggregate planetary images captured by amateur observers worldwide.

Further analysis revealed that the spotted feature formed a striking geometric pattern around Saturn's south pole. Unlike the famous six-sided feature located at Saturn's north pole, this newly identified structure possesses ten sides, leading researchers to describe it as a decagon. NASA explained that the decagon functions as a major atmospheric wave embedded directly inside one of Saturn's powerful jet streams. Observational data demonstrates that this wave extends across multiple layers of the planet's atmosphere, confirming it is not merely a localized phenomenon visible at a single cloud deck.

The discovery gained definitive confirmation through data collected by NASA's Hubble Space Telescope, whose vantage point above Earth avoids the atmospheric blurring that impacts ground-based telescopes. Researchers analyzed Hubble observations gathered over several years via the Outer Planet Atmospheres Legacy, or OPAL, program. While the decagon appeared significantly more distinct in later imagery, scientists also found evidence of the structure beginning to emerge within archival Hubble data dating back to 2023. This extended timeline proved essential, allowing the research team to track the feature as it evolved instead of relying on a single isolated snapshot.

The finding adds a new dimension to our understanding of Saturn's meteorology, particularly because the planet's north pole has famously hosted a hexagon-shaped atmospheric feature for decades. NASA's Voyager spacecraft initially discovered the six-sided northern pattern during flybys conducted in 1980 and 1981, and it has remained visible ever since. Conversely, scientists had spent decades searching for a corresponding southern structure in Hubble data starting from 1990, but even NASA's Cassini spacecraft mission—which orbited Saturn from 2004 until 2017—did not uncover evidence of a comparable long-lived formation in the southern hemisphere.

Because Saturn's south pole was obscured from Earth's direct view during portions of the pre-2023 period and the Cassini mission concluded in 2017, researchers cannot pinpoint the exact moment the decagon originally formed. Nevertheless, the southern decagon's association with atmospheric circulation and powerful jet streams suggests it is actively evolving and strengthening. Scientists emphasize that its multi-layered presence provides valuable clues regarding how gas giant atmospheres move and how large-scale waves materialize under rapid planetary rotation, even though the precise triggers behind its development remain undetermined.

Barry's involvement underscores the growing contribution of citizen science and amateur astronomy to modern planetary research. Operating from his residential property in Broken Hill, his imagery successfully integrated into an extensive scientific investigation bridging independent observers, major research institutions, space telescopes, and multi-year datasets. NASA formally recognized Barry and Oger for their contributions in bringing the subtle southern polar pattern to light. Following the publication, local reports from ABC News indicated that Barry intends to continue his monitoring of Saturn as researchers endeavor to track how the decagon changes over time.

Looking ahead, astronomers face numerous unanswered questions regarding the newly identified structure. Key objectives include determining the exact formation mechanism of the decagon, calculating its expected lifespan, and assessing whether it will eventually stabilize in a manner similar to the northern hexagon. Investigators plan to utilize further observations from Hubble, NASA's James Webb Space Telescope, and advanced computer modeling to examine the atmospheric dynamics driving the pattern. Ultimately, the discovery underscores how a combination of space-based observatories and dedicated backyard astronomy can continue to unveil unprecedented phenomena across the solar system.