NASA's Cassini spacecraft circled Saturn for 13 years and never saw a shape at the south pole, but when the planet's slow seasons tilted that pole back toward Earth, a giant ten-sided figure was waiting there — and it had not existed while the probe was watch - Space Daily
NASA and international researchers have confirmed the existence of a ten-sided atmospheric wave, or decagon, at Saturn's south pole. This discovery was made possible by changing seasonal tilts that finally brought the pole into view for Earth-based telescopes.
Why it matters
This discovery challenges previous assumptions about Saturn's atmospheric dynamics and demonstrates the importance of long-term planetary observation.
A perfect ten-sided storm has materialized at Saturn's south pole—and it vanished the moment scientists stopped looking.
Published September 4, 2026 · How we edit
Saturn has been keeping a secret at its bottom, and it took the planet’s own calendar to give it away.
This week, NASA and an international team announced that Hubble has confirmed a decagon — a giant, regular, ten-sided atmospheric wave — wrapped around Saturn’s south pole. The study, led by Agustín Sánchez-Lavega of the University of the Basque Country, was published in Science Advances on September 2.
It is the first large geometric jet pattern ever found in Saturn’s southern hemisphere. And the strangest part is not the shape. It is the timing.
Get smarter about the news
Sign up free for a feed built around what you actually care about, Dive Deeper research on any story, and the full text of every article.
Create free accountAlready have an account? Sign in