{"id":528326,"date":"2026-09-03T04:00:37","date_gmt":"2026-09-02T18:00:37","guid":{"rendered":"https:\/\/science.nasa.gov\/missions\/hubble\/nasas-hubble-tracks-new-decagon-encircling-saturns-south-pole\/"},"modified":"2026-09-03T04:00:37","modified_gmt":"2026-09-02T18:00:37","slug":"nasas-hubble-tracks-new-decagon-encircling-saturns-south-pole","status":"publish","type":"post","link":"https:\/\/www.vibewire.com.au\/?p=528326","title":{"rendered":"NASA\u2019s Hubble Tracks New Decagon Encircling Saturn\u2019s South Pole"},"content":{"rendered":"<div id=\"\" class=\"hds-module hds-module-full alignfull wp-block-nasa-blocks-secondary-navigation\">\n<div class=\"hds-secondary-navigation-wrapper z-top width-100 padding-0\">\n<div id=\"\" class=\"hds-secondary-navigation width-full border-bottom-1px text-center hds-color-mode-dark hds-module hds-module-full alignfull wp-block-nasa-blocks-hdsnav\"><button type=\"button\" class=\"hds-secondary-nav-mobile-button display-flex tablet:display-flex desktop:display-none width-full flex-align-center bg-carbon-90 border-color-carbon-80 color-spacesuit-white\" aria-expanded=\"false\" aria-controls=\"hds-secondary-nav-track\"><span>Explore Hubble<\/span><svg width=\"16\" height=\"16\" alt=\"\" enable-background=\"new 0 0 400 400\" viewBox=\"0 0 400 400\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"m4.2 122.2 195.1 195.1 196.5-196.6-37.9-38-157.8 157.8-156.8-156.8z\" \/><\/svg><\/button><\/p>\n<div class=\"hds-secondary-nav-track grid-container grid-container-extrawide padding-0 tablet:padding-x-3 desktop:padding-x-2 hds-secondary-navigation-has-breadcrumbs\">\n<div class=\"hds-secondary-navigation-breadcrumbs display-none tablet:display-none desktop:display-flex flex-align-center\">\n<nav class=\"usa-breadcrumb\" aria-label=\"Breadcrumbs\">\n<ol class=\"usa-breadcrumb__list\">\n<li class=\"usa-breadcrumb__list-item\"><a href=\"https:\/\/science.nasa.gov\/\" class=\"usa-breadcrumb__link\" 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class=\"width-full maxw-full article-header\">\n<div class=\"margin-bottom-2 width-full maxw-full\">\n<p class=\"label carbon-60 margin-0 margin-bottom-3 padding-0\">5 min read<\/p>\n<h1 class=\"display-48 margin-bottom-2\">NASA\u2019s Hubble Tracks New Decagon Encircling Saturn\u2019s South Pole<\/h1>\n<\/div>\n<\/div>\n<\/div>\n<div id=\"\" class=\"hds-media hds-module wp-block-image\">\n<div class=\"margin-left-auto margin-right-auto nasa-block-align-wide\">\n<div class=\"hds-media-wrapper margin-left-auto margin-right-auto\">\n<figure class=\"hds-media-inner hds-cover-wrapper hds-media-ratio-fit \"><a href=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/09\/STScI-01M0T8BARTCFQW684XQ932TNNM.png?w=2494&#038;h=1247&#038;%23038;fit=clip&#038;%23038;crop=faces%2Cfocalpoint\" rel=\"noopener\"><img fetchpriority=\"high\" decoding=\"async\" width=\"2494\" height=\"1247\" src=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/09\/STScI-01M0T8BARTCFQW684XQ932TNNM.png?w=2494&#038;h=1247&#038;%23038;fit=clip&#038;%23038;crop=faces%2Cfocalpoint\" class=\"attachment-2048x2048 size-2048x2048\" alt=\"Side-by-side comparison of two views of the gas giant Saturn, labeled \u201cAugust 29, 2025\u201d at the top left corner. At left is a straight-on view of Saturn, a globe with pale yellow horizontal bands at the equator and orange and pink at the mid-latitudes. Some bands towards the north and south pole have a light blue hue. There are prominent horizontal rings circling at the equator. At right, labeled \u201cSaturn\u2019s south pole,\u201d the south-polar view of Saturn shows concentric bands in its atmosphere, mostly tan and orange, surrounding a dark central region that has a 10-sided outline. A small, dashed circle at the very center of the pole with an \u201cX\u201d inside denotes missing data.\" style=\"transform: scale(1); transform-origin: 50% 50%; object-position: 50% 50%; object-fit: cover;\" block_context=\"nasa-block\" loading=\"eager\" srcset=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/09\/STScI-01M0T8BARTCFQW684XQ932TNNM.png?w=2494&#038;h=1247&#038;fit=crop&#038;crop=faces%2Cfocalpoint 2494w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/09\/STScI-01M0T8BARTCFQW684XQ932TNNM.png?w=300&#038;h=150&#038;fit=crop&#038;crop=faces%2Cfocalpoint 300w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/09\/STScI-01M0T8BARTCFQW684XQ932TNNM.png?w=768&#038;h=384&#038;fit=crop&#038;crop=faces%2Cfocalpoint 768w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/09\/STScI-01M0T8BARTCFQW684XQ932TNNM.png?w=1024&#038;h=512&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1024w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/09\/STScI-01M0T8BARTCFQW684XQ932TNNM.png?w=1536&#038;h=768&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1536w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/09\/STScI-01M0T8BARTCFQW684XQ932TNNM.png?w=2048&#038;h=1024&#038;fit=crop&#038;crop=faces%2Cfocalpoint 2048w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/09\/STScI-01M0T8BARTCFQW684XQ932TNNM.png?w=400&#038;h=200&#038;fit=crop&#038;crop=faces%2Cfocalpoint 400w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/09\/STScI-01M0T8BARTCFQW684XQ932TNNM.png?w=600&#038;h=300&#038;fit=crop&#038;crop=faces%2Cfocalpoint 600w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/09\/STScI-01M0T8BARTCFQW684XQ932TNNM.png?w=900&#038;h=450&#038;fit=crop&#038;crop=faces%2Cfocalpoint 900w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/09\/STScI-01M0T8BARTCFQW684XQ932TNNM.png?w=1200&#038;h=600&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1200w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/09\/STScI-01M0T8BARTCFQW684XQ932TNNM.png?w=2000&#038;h=1000&#038;fit=crop&#038;crop=faces%2Cfocalpoint 2000w\" sizes=\"auto, (max-width: 2494px) 100vw, 2494px\" \/><\/a><\/figure><figcaption class=\"hds-caption padding-y-2\">\n<div class=\"hds-caption-text p-sm margin-0\">Recent NASA Hubble Space Telescope images show the gas giant Saturn and its southern pole, where astronomers have discovered a 10-sided atmospheric wave. Observations show the decagon extends through multiple layers of Saturn\u2019s atmosphere.<\/div>\n<div class=\"hds-credits\">Image: NASA, ESA, STScI, Agustin S\u00e1nchez-Lavega (UPV), Amy Simon (NASA-GSFC), Michael Wong (UC Berkeley); Image Processing: Alyssa Pagan<\/div>\n<\/figcaption><\/div>\n<\/div>\n<\/div>\n<p class=\"wp-block-paragraph\">Recent observations with NASA\u2019s <a href=\"https:\/\/science.nasa.gov\/mission\/hubble\/\" rel=\"noopener\">Hubble Space Telescope<\/a> have revealed a giant, evolving, 10-sided atmospheric wave encircling Saturn\u2019s south pole. This discovery marks the first time a large, regular-sided jet pattern has been observed in the planet\u2019s southern hemisphere. The feature appears remarkably similar to Saturn\u2019s <a href=\"https:\/\/science.nasa.gov\/mission\/cassini\/science\/saturn\/hexagon-in-motion\/\" rel=\"noopener\">famous hexagon at its northern pole<\/a>, but is also distinctly different, suggesting scientists may be witnessing a new atmospheric phenomenon develop on the iconic gas giant.<\/p>\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/www.science.org\/doi\/10.1126\/sciadv.aee4251\"  rel=\"noreferrer noopener nofollow\">The results<\/a> published Wednesday in the journal Science Advances.\u00a0<\/p>\n<p class=\"wp-block-paragraph\">By piecing together several years of Hubble observations dating back to 2023, researchers found subtle hints of the structure beginning to emerge before it became a clearly defined pattern. Those observations were taken as part of Hubble\u2019s Outer Planet Atmospheres Legacy (OPAL) program, which has photographed the outer planets annually for <a href=\"https:\/\/science.nasa.gov\/missions\/hubble\/nasas-hubble-celebrates-decade-of-tracking-outer-planets\/\" rel=\"noopener\">more than a decade<\/a>.\u00a0<\/p>\n<p class=\"wp-block-paragraph\">\u201cWe\u2019ve never seen anything quite like this in Saturn\u2019s southern hemisphere,\u201d said Amy Simon, study co-author and OPAL principal investigator, NASA\u2019s Goddard Space Flight Center in Greenbelt, Maryland. \u201cThe northern hexagon has been there every time we\u2019ve looked for more than 40 years. This feature is different \u2014 it appears to be strengthening, giving us the rare opportunity to watch a giant atmospheric pattern develop.\u201d<\/p>\n<p class=\"wp-block-paragraph\">The discovery was possible because Saturn\u2019s changing seasons gradually brought the planet\u2019s south pole back into view from Earth, where astronomers who collectively analyze images of Saturn from ground-based observatories first identified it.<\/p>\n<p class=\"wp-block-paragraph\">Agust\u00edn S\u00e1nchez-Lavega, lead author of the new study, is a researcher at the University of the Basque Country in Spain. The university manages a website, called <a href=\"http:\/\/pvol2.ehu.eus\/pvol2\/\"  rel=\"noreferrer noopener nofollow\">Planetary Virtual Observatory Laboratory<\/a>, that accepts ground-based images of solar system planets contributed by observers all over the world. It was in those images, first in 2024, that S\u00e1nchez-Lavega and amateur astronomers Trevor Barry and Jean-Paul Oger noticed a subtle undulating band along the southern pole. Additional 2025 imagery taken from the ground hinted even more strongly toward this decagon structure.<\/p>\n<p class=\"wp-block-paragraph\">That\u2019s when the Hubble observations come into the picture. Hubble\u2019s view from space offers unmatched image sharpness and spatial resolution over full rotations of Saturn, without smearing by Earth\u2019s atmosphere.\u00a0<\/p>\n<p class=\"wp-block-paragraph\">\u201cGiven Saturn\u2019s symmetry in its north-south jet stream system, we have been searching for a counterpart to Saturn\u2019s northern hexagon on the south pole in Hubble images since 1990,\u201d S\u00e1nchez-Lavega said. \u201cImages from NASA\u2019s Cassini spacecraft, which orbited Saturn between 2004 and 2017, showed no inkling of a long-lived formation, either. The Hubble data confirmed the feature\u2019s presence back to 2023.\u201d<\/p>\n<div id=\"\" class=\"hds-media hds-module wp-block-image\">\n<div class=\"margin-left-auto margin-right-auto nasa-block-align-inline\">\n<div class=\"hds-media-wrapper margin-left-auto margin-right-auto\">\n<figure class=\"hds-media-inner hds-cover-wrapper hds-media-ratio-cover \"><img decoding=\"async\" loading=\"lazy\" width=\"2048px\" height=\"2048px\" data-no-id=\"true\" sizes=\"auto, (max-width: 2048px) 100vw, 2048px\" srcset=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/09\/STScI-01M0TEDY8SNMB6C5E0F9T3GSJZ.tif?w=2048 2048w\" alt=\"A black and white view of Saturn\u2019s south pole, labeled \u201cAugust 29, 2025\u201d and \u201cF763M.\u201d The south-polar view of Saturn shows concentric bands of its atmosphere, transitioning from bright outer bands to a dark central region outlined in a 10-sided pattern. This outline is labeled \u201cdecagon.\u201d A small, dashed circle at the very center of the pole with an \u201cX\u201d inside denotes missing data.\" style=\"transform: scale(1); transform-origin: 50% 50%; object-position: 50% 50%; object-fit: cover;\" src=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/09\/STScI-01M0TEDY8SNMB6C5E0F9T3GSJZ.tif?w=2048\" ><\/figure><figcaption class=\"hds-caption padding-y-2\">\n<div class=\"hds-caption-text p-sm margin-0\">A single filter from NASA\u2019s Hubble Space Telescope distinctly shows a 10-sided wave encircling Saturn\u2019s south pole, labeled \u201cdecagon\u201d. An \u201cX\u201d denotes where data was not captured.<\/div>\n<div class=\"hds-credits\">Image: NASA, ESA, STScI, Agustin S\u00e1nchez-Lavega (UPV), Amy Simon (NASA-GSFC), Michael Wong (UC Berkeley); Image Processing: Alyssa Pagan<\/div>\n<\/figcaption><\/div>\n<\/div>\n<\/div>\n<p class=\"wp-block-paragraph\">The wave sits within one of Saturn\u2019s powerful jet streams and extends through multiple layers of the atmosphere, indicating it is not just a cloud-level feature, but a vertically extended atmospheric structure. The decagon\u2019s apparent position shifts slightly, because Hubble captures images from different wavelengths. Those different wavelengths probe different altitudes in Saturn\u2019s atmosphere.<\/p>\n<p class=\"wp-block-paragraph\">\u201cThe most intriguing part to me is that this seems to have just formed recently,\u201d said Simon. \u201cThe question is, why did it suddenly form now when we haven\u2019t seen one before?\u201d\u00a0<\/p>\n<p class=\"wp-block-paragraph\">The authors say further study is needed from Hubble and NASA\u2019s <a href=\"https:\/\/science.nasa.gov\/mission\/webb\/\" rel=\"noopener\">James Webb Space Telescope<\/a>, as well as analysis of computer models, to understand how the decagon formed, how long it may last, and how it compares to the long-lived hexagon in the north.<\/p>\n<p class=\"wp-block-paragraph\">Hubble\u2019s long duration in operation has allowed astronomers to track changes over time in solar system planets and <a href=\"https:\/\/science.nasa.gov\/missions\/hubble\/nasas-hubble-revisits-crab-nebula-to-track-25-years-of-expansion\/\" rel=\"noopener\">other astronomical objects<\/a> as well.<\/p>\n<p class=\"wp-block-paragraph\">Rather than providing a single snapshot, the OPAL program allows scientists to follow seasonal changes, track short-lived storms, and identify other atmospheric features that evolve slowly over time.<\/p>\n<p class=\"wp-block-paragraph\">\u201cWhen we started the OPAL program, we expected compelling surprises, but we didn\u2019t know what to expect specifically,\u201d said Mike Wong, study co-author, University of California, Berkeley. \u201cA lot of the discoveries we see coming from OPAL are not just based on one observation, but on years and years of data. Regular observations over time are enabling a lot of new findings.\u201d<\/p>\n<p class=\"wp-block-paragraph\">The team plans to continue observing Saturn to determine whether the decagon settles into a long-lived, stable configuration like the northern hexagon or continues to evolve. Future observations also could help scientists determine what drives the wave, what it reveals about the atmospheric dynamics of giant planets throughout the solar system, and how they may relate to those we see here on Earth.<\/p>\n<p class=\"wp-block-paragraph\"><em>The Hubble Space Telescope has been operating for more than three decades and continues to make ground-breaking discoveries that shape our fundamental understanding of the universe. Hubble is a project of international cooperation between NASA and ESA (European Space Agency). NASA\u2019s Goddard Space Flight Center in Greenbelt, Maryland, manages the telescope and mission operations. Lockheed Martin Space also supports mission operations at Goddard. 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Videos\t\t\t<\/h2>\n<\/p>\n<\/div>\n<div class=\"grid-row padding-y-2 border-top-1px border-color-carbon-30-important\">\n<div class=\"grid-row featured-link-list-row width-full flex-align-center\">\n<div class=\"grid-col-2 desktop:grid-col-1 tablet:padding-right-3 desktop:padding-right-5\">\n<div class=\"width-full\">\n<div class=\"hds-cover-wrapper width-full ratio-1x1 radius-pill overflow-hidden\">\n<figure class=\"hds-media-background  \"><img decoding=\"async\" width=\"2494\" height=\"1247\" src=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/09\/STScI-01M0T8BARTCFQW684XQ932TNNM.png?w=2494&#038;h=1247&#038;%23038;fit=clip&#038;%23038;crop=faces%2Cfocalpoint\" class=\"attachment-thumbnail size-thumbnail\" alt=\"Side-by-side comparison of two views of the gas giant Saturn, labeled \u201cAugust 29, 2025\u201d at the top left corner. At left is a straight-on view of Saturn, a globe with pale yellow horizontal bands at the equator and orange and pink at the mid-latitudes. Some bands towards the north and south pole have a light blue hue. There are prominent horizontal rings circling at the equator. At right, labeled \u201cSaturn\u2019s south pole,\u201d the south-polar view of Saturn shows concentric bands in its atmosphere, mostly tan and orange, surrounding a dark central region that has a 10-sided outline. A small, dashed circle at the very center of the pole with an \u201cX\u201d inside denotes missing data.\" style=\"transform: scale(1.2); transform-origin: 50% 50%; object-position: 50% 50%; object-fit: cover;\" block_context=\"nasa-block\" loading=\"lazy\" srcset=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/09\/STScI-01M0T8BARTCFQW684XQ932TNNM.png?w=2494&#038;h=1247&#038;fit=crop&#038;crop=faces%2Cfocalpoint 2494w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/09\/STScI-01M0T8BARTCFQW684XQ932TNNM.png?w=300&#038;h=150&#038;fit=crop&#038;crop=faces%2Cfocalpoint 300w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/09\/STScI-01M0T8BARTCFQW684XQ932TNNM.png?w=768&#038;h=384&#038;fit=crop&#038;crop=faces%2Cfocalpoint 768w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/09\/STScI-01M0T8BARTCFQW684XQ932TNNM.png?w=1024&#038;h=512&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1024w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/09\/STScI-01M0T8BARTCFQW684XQ932TNNM.png?w=1536&#038;h=768&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1536w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/09\/STScI-01M0T8BARTCFQW684XQ932TNNM.png?w=2048&#038;h=1024&#038;fit=crop&#038;crop=faces%2Cfocalpoint 2048w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/09\/STScI-01M0T8BARTCFQW684XQ932TNNM.png?w=400&#038;h=200&#038;fit=crop&#038;crop=faces%2Cfocalpoint 400w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/09\/STScI-01M0T8BARTCFQW684XQ932TNNM.png?w=600&#038;h=300&#038;fit=crop&#038;crop=faces%2Cfocalpoint 600w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/09\/STScI-01M0T8BARTCFQW684XQ932TNNM.png?w=900&#038;h=450&#038;fit=crop&#038;crop=faces%2Cfocalpoint 900w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/09\/STScI-01M0T8BARTCFQW684XQ932TNNM.png?w=1200&#038;h=600&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1200w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/09\/STScI-01M0T8BARTCFQW684XQ932TNNM.png?w=2000&#038;h=1000&#038;fit=crop&#038;crop=faces%2Cfocalpoint 2000w\" sizes=\"auto, (max-width: 2494px) 100vw, 2494px\" \/><\/figure>\n<\/p>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"grid-col-8 desktop:grid-col-10 padding-left-3 desktop:padding-left-0\">\n<div class=\"grid-row flex-align-center\">\n<div class=\"grid-col-12 desktop:grid-col-6\">\n<h2 class=\"heading-36 margin-0\">Decagon on Saturn\u2019s South Pole (Color)<\/h2>\n<\/p>\n<\/div>\n<div class=\"grid-col-12 desktop:grid-col-6\">\n<p class=\"p-md margin-0 color-carbon-black-important\">Recent NASA Hubble Space Telescope images show the gas giant Saturn and its southern pole, where astronomers have discovered a 10-sided atmospheric wave. Observations show the decagon extends through multiple layers of Saturn\u2019s atmosphere.<\/p>\n<\/p>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"grid-col-2 desktop:grid-col-1 display-flex flex-justify-end\">\n\t\t\t\t\t\t<a href=\"https:\/\/science.nasa.gov\/asset\/hubble\/decagon-on-saturns-south-pole-color\/\"  aria-label=\"Decagon on Saturn\u2019s South Pole (Color)\" class=\"link-external-false\" rel=\"noopener\"><br \/>\n                            <svg class=\"hds-featured-link-list-button margin-left-auto margin-right-0\" viewBox=\"0 0 32 32\" fill=\"none\">\n                                <circle class=\"color-nasa-red\" cx=\"16\" cy=\"16\" r=\"16\"><\/circle><path d=\"M8 16.956h12.604l-3.844 4.106 1.252 1.338L24 16l-5.988-6.4-1.252 1.338 3.844 4.106H8v1.912z\" class=\"color-spacesuit-white\"><\/path>\n                            <\/svg><br \/>\n\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n<\/p>\n<\/div>\n<\/div>\n<div class=\"grid-row padding-y-2 border-top-1px border-color-carbon-30-important\">\n<div class=\"grid-row featured-link-list-row width-full flex-align-center\">\n<div class=\"grid-col-2 desktop:grid-col-1 tablet:padding-right-3 desktop:padding-right-5\">\n<div class=\"width-full\">\n<div class=\"hds-cover-wrapper width-full ratio-1x1 radius-pill overflow-hidden\">\n<figure class=\"hds-media-background  \"><img decoding=\"async\" loading=\"lazy\" width=\"150px\" height=\"150px\" data-no-id=\"true\" sizes=\"auto, (max-width: 150px) 100vw, 150px\" srcset=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/09\/STScI-01M0TEDY8SNMB6C5E0F9T3GSJZ.tif?w=150 150w\" alt=\"A black and white view of Saturn\u2019s south pole, labeled \u201cAugust 29, 2025\u201d and \u201cF763M.\u201d The south-polar view of Saturn shows concentric bands of its atmosphere, transitioning from bright outer bands to a dark central region outlined in a 10-sided pattern. This outline is labeled \u201cdecagon.\u201d A small, dashed circle at the very center of the pole with an \u201cX\u201d inside denotes missing data.\" style=\"transform: scale(1.2); transform-origin: 50% 50%; object-position: 50% 50%; object-fit: cover;\" src=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2026\/09\/STScI-01M0TEDY8SNMB6C5E0F9T3GSJZ.tif?w=150\" ><\/figure>\n<\/p>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"grid-col-8 desktop:grid-col-10 padding-left-3 desktop:padding-left-0\">\n<div class=\"grid-row flex-align-center\">\n<div class=\"grid-col-12 desktop:grid-col-6\">\n<h2 class=\"heading-36 margin-0\">Decagon on Saturn\u2019s South Pole (Single Filter)<\/h2>\n<\/p>\n<\/div>\n<div class=\"grid-col-12 desktop:grid-col-6\">\n<p class=\"p-md margin-0 color-carbon-black-important\">A single filter from NASA\u2019s Hubble Space Telescope distinctly shows a 10-sided wave encircling Saturn\u2019s south pole, labeled \u201cdecagon\u201d. An \u201cX\u201d denotes where data was not captured.<\/p>\n<\/p>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"grid-col-2 desktop:grid-col-1 display-flex flex-justify-end\">\n\t\t\t\t\t\t<a href=\"https:\/\/science.nasa.gov\/asset\/hubble\/decagon-on-saturns-south-pole-single-filter\/\"  aria-label=\"Decagon on Saturn\u2019s South Pole (Single Filter)\" class=\"link-external-false\" rel=\"noopener\"><br \/>\n                            <svg class=\"hds-featured-link-list-button margin-left-auto margin-right-0\" viewBox=\"0 0 32 32\" fill=\"none\">\n                                <circle class=\"color-nasa-red\" cx=\"16\" cy=\"16\" r=\"16\"><\/circle><path d=\"M8 16.956h12.604l-3.844 4.106 1.252 1.338L24 16l-5.988-6.4-1.252 1.338 3.844 4.106H8v1.912z\" class=\"color-spacesuit-white\"><\/path>\n                            <\/svg><br \/>\n\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p><!DOCTYPE html PUBLIC \"-\/\/W3C\/\/DTD HTML 4.0 Transitional\/\/EN\" 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2.5s-2.48-1.119-2.48-2.5c0-1.38 1.11-2.5 2.48-2.5s2.48 1.12 2.48 2.5zm.02 4.5h-5v16h5v-16zm7.982 0h-4.968v16h4.969v-8.399c0-4.67 6.029-5.052 6.029 0v8.399h4.988v-10.131c0-7.88-8.922-7.593-11.018-3.714v-2.155z\"><\/path><\/svg><br \/>\n\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t<\/li>\n<li class=\"social-icon social-icon-rss\">\n\t\t\t\t\t\t\t<a href=\"https:\/\/science.nasa.gov\/feed\/\" aria-label=\"Subscribe to RSS feed.\"><br \/>\n\t\t\t\t\t\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 800 800\" aria-hidden=\"true\"><path d=\"M493 652H392c0-134-111-244-244-244V307c189 0 345 156 345 345zm71 0c0-228-188-416-416-416V132c285 0 520 235 520 520z\"><\/path><circle cx=\"219\" cy=\"581\" r=\"71\"><\/circle><\/svg><br \/>\n\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"grid-col-12 desktop:grid-col-5 padding-right-4 margin-bottom-5 desktop:margin-bottom-0\">\n<div class=\"padding-top-3 border-top-1px border-color-carbon-black\">\n<div class=\"margin-bottom-2\">\n<h2 class=\"heading-14\">Details<\/h2>\n<\/p>\n<\/div>\n<div class=\"grid-row margin-bottom-3\">\n<div class=\"grid-col-4\">\n<div class=\"subheading\">Last Updated<\/div>\n<\/p>\n<\/div>\n<div class=\"grid-col-8\">Sep 02, 2026<\/div>\n<\/p>\n<\/div>\n<div class=\"grid-row margin-bottom-3\">\n<div class=\"grid-col-4\">\n<div class=\"subheading\">Editor<\/div>\n<\/div>\n<div class=\"grid-col-8\">Andrea Gianopoulos<\/div>\n<\/div>\n<div class=\"grid-row\">\n<div class=\"grid-col-4\">\n<div class=\"subheading\">Location<\/div>\n<\/div>\n<div class=\"grid-col-8\"><a class=\"hds-location-tag-name\" href=\"https:\/\/nasa.gov\/goddard\" rel=\"noopener\"><span class=\"hds-meta-heading\">NASA Goddard Space Flight Center<\/span><\/a><\/div>\n<\/div>\n<div class=\"grid-row margin-y-3\">\n<div class=\"grid-col-4\">\n<div class=\"subheading\">Contact<\/div>\n<\/p>\n<\/div>\n<div class=\"grid-col-8\">\n<div class=\"margin-bottom-3\">\n<div class=\"heading-16 padding-bottom-1 border-bottom margin-bottom-2\">Media<\/div>\n<div class=\"cnd-extra-left-wysiwyg\">\n<p><strong>Claire Andreoli<\/strong><br \/>\nNASA\u2019s Goddard Space Flight Center<br \/>\nGreenbelt, Maryland<br \/>\n<a href=\"mailto:claire.andreoli@nasa.gov\">claire.andreoli@nasa.gov<\/a><\/p>\n<p><strong>Hannah Braun<\/strong><br \/>\nSpace Telescope Science Institute<br \/>\nBaltimore, Maryland<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"grid-col-12 desktop:grid-col-5 padding-right-4 margin-bottom-5 desktop:margin-bottom-0\">\n<div class=\"padding-top-3 border-top-1px border-color-carbon-black \">\n<div class=\"margin-bottom-2\">\n<h2 class=\"heading-14\">Related Terms<\/h2>\n<\/div>\n<ul class=\"article-tags\">\n<li class=\"article-tag\"><a href=\"https:\/\/science.nasa.gov\/mission\/hubble\" rel=\"noopener\">Hubble Space Telescope<\/a><\/li>\n<li class=\"article-tag\"><a href=\"https:\/\/science.nasa.gov\/astrophysics\/\" rel=\"noopener\">Astrophysics<\/a><\/li>\n<li class=\"article-tag\"><a href=\"https:\/\/science.nasa.gov\/astrophysics\/\" rel=\"noopener\">Astrophysics Division<\/a><\/li>\n<li class=\"article-tag\"><a href=\"https:\/\/www.nasa.gov\/goddard\/\" rel=\"noopener\">Goddard Space Flight Center<\/a><\/li>\n<li class=\"article-tag\"><a href=\"https:\/\/science.nasa.gov\/saturn\/\" rel=\"noopener\">Saturn<\/a><\/li>\n<li class=\"article-tag\"><a href=\"https:\/\/science.nasa.gov\/solar-system\/\" rel=\"noopener\">The Solar System<\/a><\/li>\n<\/ul>\n<p><html><body><\/p>\n<div class=\"margin-top-6\">\n<h2 class=\"heading-14 margin-bottom-2\">Related Links and Documents<\/h2>\n<div class=\"cnd-extra-right-wysiwyg\">\n<ul>\n<li><a href=\"https:\/\/esahubble.org\/news\/heic2612\/\" rel=\"noopener\">This story on ESA\/Hubble\u2019s website.<\/a><\/li>\n<\/ul>\n<\/div>\n<\/div>\n<p><\/body><\/html><\/div>\n<\/div>\n<\/div>\n<\/section>\n<\/div>\n<p><\/body><\/html><\/p>\n<div id=\"\" class=\"hds-topic-cards nasa-gb-align-full maxw-full width-full padding-y-6 padding-x-3 color-mode-dark hds-module hds-module-full alignfull wp-block-nasa-blocks-topic-cards\">\n<div class=\"grid-container grid-container-block-lg padding-x-0\">\n<div class=\"grid-row flex-align-center margin-bottom-3\">\n<div class=\"desktop:grid-col-8 margin-bottom-2 desktop:margin-bottom-0\">\n<div class=\"label color-carbon-60 margin-bottom-2\">Keep Exploring<\/div>\n<h2 class=\"heading-36 line-height-sm\">Discover More Topics From Hubble<\/h2>\n<\/p>\n<\/div>\n<\/div>\n<div class=\"grid-row grid-gap-2 hds-topic-cards-wrapper\">\n\t\t\t\t\t<a href=\"https:\/\/science.nasa.gov\/mission\/hubble\/\" class=\"mobile:grid-col-12 tablet:grid-col-6 desktop:grid-col-3 topic-card margin-bottom-4 desktop:margin-bottom-0\" rel=\"noopener\"><\/p>\n<div class=\"hds-topic-card hds-cover-wrapper cover-hover-zoom bg-carbon-black\">\n<div class=\"skrim-overlay skrim-overlay-dark skrim-left mobile-skrim-top padding-3 display-flex flex-align-end flex-justify-start z-200\">\n<div>\n<h3 class=\"hds-topic-card-heading heading-29 color-spacesuit-white line-height-sm margin-top-0 margin-bottom-1\">\n\t\t\t\t\t\t\t\t<span>Hubble Space Telescope<\/span><br \/>\n\t\t\t\t\t\t\t\t<svg viewBox=\"0 0 32 32\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><circle class=\"color-nasa-red\" cx=\"16\" cy=\"16\" r=\"16\"><\/circle><path d=\"M8 16.956h12.604l-3.844 4.106 1.252 1.338L24 16l-5.988-6.4-1.252 1.338 3.844 4.106H8v1.912z\" class=\"color-spacesuit-white\"><\/path><\/svg><br \/>\n\t\t\t\t\t\t\t<\/h3>\n<p class=\"margin-bottom-0 margin-top-2 color-carbon-20-important\">Since its 1990 launch, the Hubble Space Telescope has changed our fundamental understanding of the universe.<\/p>\n<\/p>\n<\/div>\n<\/div>\n<figure class=\"hds-media-background  \"><img decoding=\"async\" width=\"4031\" height=\"4095\" src=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/cds\/general\/images\/2023\/07\/hubble-space-telescope-hst-6.jpg?w=4031&#038;h=4095&#038;%23038;fit=clip&#038;%23038;crop=faces%2Cfocalpoint\" class=\"attachment-1536x1536 size-1536x1536\" alt=\"\" style=\"transform: scale(1); transform-origin: 50% 50%; object-position: 50% 50%; object-fit: cover;\" block_context=\"nasa-block\" loading=\"lazy\" srcset=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/cds\/general\/images\/2023\/07\/hubble-space-telescope-hst-6.jpg?w=4031&#038;h=4095&#038;fit=crop&#038;crop=faces%2Cfocalpoint 4031w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/cds\/general\/images\/2023\/07\/hubble-space-telescope-hst-6.jpg?w=295&#038;h=300&#038;fit=crop&#038;crop=faces%2Cfocalpoint 295w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/cds\/general\/images\/2023\/07\/hubble-space-telescope-hst-6.jpg?w=768&#038;h=780&#038;fit=crop&#038;crop=faces%2Cfocalpoint 768w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/cds\/general\/images\/2023\/07\/hubble-space-telescope-hst-6.jpg?w=1008&#038;h=1024&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1008w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/cds\/general\/images\/2023\/07\/hubble-space-telescope-hst-6.jpg?w=1512&#038;h=1536&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1512w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/cds\/general\/images\/2023\/07\/hubble-space-telescope-hst-6.jpg?w=2016&#038;h=2048&#038;fit=crop&#038;crop=faces%2Cfocalpoint 2016w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/cds\/general\/images\/2023\/07\/hubble-space-telescope-hst-6.jpg?w=50&#038;h=51&#038;fit=crop&#038;crop=faces%2Cfocalpoint 50w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/cds\/general\/images\/2023\/07\/hubble-space-telescope-hst-6.jpg?w=394&#038;h=400&#038;fit=crop&#038;crop=faces%2Cfocalpoint 394w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/cds\/general\/images\/2023\/07\/hubble-space-telescope-hst-6.jpg?w=591&#038;h=600&#038;fit=crop&#038;crop=faces%2Cfocalpoint 591w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/cds\/general\/images\/2023\/07\/hubble-space-telescope-hst-6.jpg?w=886&#038;h=900&#038;fit=crop&#038;crop=faces%2Cfocalpoint 886w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/cds\/general\/images\/2023\/07\/hubble-space-telescope-hst-6.jpg?w=1181&#038;h=1200&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1181w, https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/cds\/general\/images\/2023\/07\/hubble-space-telescope-hst-6.jpg?w=1969&#038;h=2000&#038;fit=crop&#038;crop=faces%2Cfocalpoint 1969w\" sizes=\"auto, (max-width: 4031px) 100vw, 4031px\" \/><\/figure>\n<\/p>\n<\/div>\n<p>\t\t\t<\/a><br \/>\n\t\t\t\t\t<a href=\"https:\/\/science.nasa.gov\/mission\/hubble\/science\/science-highlights\/\" class=\"mobile:grid-col-12 tablet:grid-col-6 desktop:grid-col-3 topic-card margin-bottom-4 desktop:margin-bottom-0\" rel=\"noopener\"><\/p>\n<div class=\"hds-topic-card hds-cover-wrapper cover-hover-zoom bg-carbon-black\">\n<div class=\"skrim-overlay skrim-overlay-dark skrim-left mobile-skrim-top padding-3 display-flex flex-align-end flex-justify-start z-200\">\n<div>\n<h3 class=\"hds-topic-card-heading heading-29 color-spacesuit-white line-height-sm margin-top-0 margin-bottom-1\">\n\t\t\t\t\t\t\t\t<span>Hubble Science Highlights<\/span><br \/>\n\t\t\t\t\t\t\t\t<svg viewBox=\"0 0 32 32\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><circle class=\"color-nasa-red\" cx=\"16\" cy=\"16\" r=\"16\"><\/circle><path d=\"M8 16.956h12.604l-3.844 4.106 1.252 1.338L24 16l-5.988-6.4-1.252 1.338 3.844 4.106H8v1.912z\" class=\"color-spacesuit-white\"><\/path><\/svg><br \/>\n\t\t\t\t\t\t\t<\/h3>\n<p class=\"margin-bottom-0 margin-top-2 color-carbon-20-important\">Hubble&#8217;s most notable scientific discoveries reflect the broad range of research and the breakthroughs it has achieved.<\/p>\n<\/p>\n<\/div>\n<\/div>\n<figure class=\"hds-media-background  \"><img decoding=\"async\" width=\"539\" height=\"565\" src=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/astro\/universe\/internal_resources\/462\/Pillars_of_Creation-1.jpeg?w=539&#038;h=565&#038;%23038;fit=clip&#038;%23038;crop=faces%2Cfocalpoint\" class=\"attachment-1536x1536 size-1536x1536\" alt=\"\" style=\"transform: scale(1); transform-origin: 50% 50%; object-position: 50% 50%; object-fit: cover;\" block_context=\"nasa-block\" loading=\"lazy\" \/><\/figure>\n<\/p>\n<\/div>\n<p>\t\t\t<\/a><br \/>\n\t\t\t\t\t<a href=\"https:\/\/science.nasa.gov\/mission\/hubble\/multimedia\/hubble-images\/\" class=\"mobile:grid-col-12 tablet:grid-col-6 desktop:grid-col-3 topic-card margin-bottom-4 desktop:margin-bottom-0\" rel=\"noopener\"><\/p>\n<div class=\"hds-topic-card hds-cover-wrapper cover-hover-zoom bg-carbon-black\">\n<div class=\"skrim-overlay skrim-overlay-dark skrim-left mobile-skrim-top padding-3 display-flex flex-align-end flex-justify-start z-200\">\n<div>\n<h3 class=\"hds-topic-card-heading heading-29 color-spacesuit-white line-height-sm margin-top-0 margin-bottom-1\">\n\t\t\t\t\t\t\t\t<span>Hubble Images<\/span><br \/>\n\t\t\t\t\t\t\t\t<svg viewBox=\"0 0 32 32\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><circle class=\"color-nasa-red\" cx=\"16\" cy=\"16\" r=\"16\"><\/circle><path d=\"M8 16.956h12.604l-3.844 4.106 1.252 1.338L24 16l-5.988-6.4-1.252 1.338 3.844 4.106H8v1.912z\" class=\"color-spacesuit-white\"><\/path><\/svg><br \/>\n\t\t\t\t\t\t\t<\/h3>\n<p class=\"margin-bottom-0 margin-top-2 color-carbon-20-important\">Explore Hubble&#8217;s iconic images of the universe, and view photos of mission operations and astronauts servicing Hubble in space.<\/p>\n<\/p>\n<\/div>\n<\/div>\n<figure class=\"hds-media-background  \"><img decoding=\"async\" loading=\"lazy\" width=\"1536px\" height=\"1536px\" data-no-id=\"true\" sizes=\"auto, (max-width: 1536px) 100vw, 1536px\" srcset=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2024\/07\/STScI-01J1X1RNTC893XMKJREG898ZXB.tif?w=1536 1536w\" alt=\"\" style=\"transform: scale(1); transform-origin: 50% 50%; object-position: 50% 50%; object-fit: cover;\" src=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2024\/07\/STScI-01J1X1RNTC893XMKJREG898ZXB.tif?w=1536\" ><\/figure>\n<\/p>\n<\/div>\n<p>\t\t\t<\/a><br \/>\n\t\t\t\t\t<a href=\"https:\/\/science.nasa.gov\/?post_type=mission&#038;p=53188\" class=\"mobile:grid-col-12 tablet:grid-col-6 desktop:grid-col-3 topic-card margin-bottom-4 desktop:margin-bottom-0\" rel=\"noopener\"><\/p>\n<div class=\"hds-topic-card hds-cover-wrapper cover-hover-zoom bg-carbon-black\">\n<div class=\"skrim-overlay skrim-overlay-dark skrim-left mobile-skrim-top padding-3 display-flex flex-align-end flex-justify-start z-200\">\n<div>\n<p class=\"hds-topic-card-heading heading-29 color-spacesuit-white line-height-sm margin-top-0 margin-bottom-1\">\n\t\t\t\t\t\t\t\t<span>Hubble News<\/span><br \/>\n\t\t\t\t\t\t\t\t<svg viewBox=\"0 0 32 32\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><circle class=\"color-nasa-red\" cx=\"16\" cy=\"16\" r=\"16\"><\/circle><path d=\"M8 16.956h12.604l-3.844 4.106 1.252 1.338L24 16l-5.988-6.4-1.252 1.338 3.844 4.106H8v1.912z\" class=\"color-spacesuit-white\"><\/path><\/svg>\n\t\t\t\t\t\t\t<\/p>\n<\/p>\n<\/div>\n<\/div>\n<figure class=\"hds-media-background  \"><img decoding=\"async\" loading=\"lazy\" width=\"1536px\" height=\"1536px\" data-no-id=\"true\" sizes=\"auto, (max-width: 1536px) 100vw, 1536px\" srcset=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2005\/02\/STScI-01EVT8D2PRXPF512PH8C8DCXXM.tif?w=1536 1536w\" alt=\"\" style=\"transform: scale(1); transform-origin: 50% 50%; object-position: 50% 50%; object-fit: cover;\" src=\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/missions\/hubble\/releases\/2005\/02\/STScI-01EVT8D2PRXPF512PH8C8DCXXM.tif?w=1536\" ><\/figure>\n<\/p>\n<\/div>\n<p>\t\t\t<\/a>\n\t\t\t\t<\/div>\n<\/p>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>NASA\u2019s Hubble Space Telescope observes a giant, evolving, 10-sided atmospheric wave encircling Saturn\u2019s south 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