{"id":77606,"date":"2025-09-21T20:47:07","date_gmt":"2025-09-21T20:47:07","guid":{"rendered":"https:\/\/www.europesays.com\/ie\/77606\/"},"modified":"2025-09-21T20:47:07","modified_gmt":"2025-09-21T20:47:07","slug":"nasas-webb-just-revealed-something-astonishing-in-saturns-atmosphere","status":"publish","type":"post","link":"https:\/\/www.europesays.com\/ie\/77606\/","title":{"rendered":"NASA\u2019s Webb Just Revealed Something Astonishing in Saturn\u2019s Atmosphere"},"content":{"rendered":"

\t\t\"Dark<\/a>Detections of near infrared emissions in Saturn\u2019s ionosphere (left) show dark bead-like features embedded within bright aurora. In the stratosphere (right), 500 kilometers below, a lopsided star-pattern extends towards the equator. Credit: NASA\/ESA\/CSA\/Stallard et al 2025.<\/p>\n

Using the James Webb Space Telescope, scientists uncovered bizarre atmospheric structures on Saturn, including drifting \u201cdark beads\u201d in the ionosphere and an asymmetric star pattern in the stratosphere.<\/strong><\/p>\n

Both may connect to Saturn\u2019s iconic hexagonal storm, but their true nature remains a mystery.<\/p>\n

Webb Telescope Unveils Saturn\u2019s Atmospheric Mysteries<\/p>\n

A new investigation of Saturn\u2019s upper atmosphere, carried out with the James Webb Space Telescope (JWST<\/a>), has uncovered strikingly unusual features never before observed on any planet in the Solar System. The findings were unveiled last week by Professor Tom Stallard of Northumbria University during the EPSC-DPS2025 Joint Meeting in Helsinki.<\/p>\n

\u201cThis opportunity to use JWST was the first time we have ever been able to make such detailed near-infrared observations of Saturn\u2019s aurora and upper atmosphere. The results came as a complete surprise,\u201d said Professor Stallard.<\/p>\n

This video shows how the structures observed in Saturn\u2019s ionosphere and stratosphere relate to one another. Starting with the aurora at 1100 km, the brightness is increased to reveal the dark bead-like features. The video then fades into the star-arm shapes within the underlying 600 km layer. The darkest beads in the ionosphere appear to line up with the strongest arm underneath it, but it is not clear if this is coincidental, or if it suggests coupling between Saturn\u2019s lowest and highest layers of the atmosphere. Credit: NASA\/ESA\/CSA\/Stallard et al 2025.<\/p>\n

Beads, Stars, and the Unexpected Patterns<\/p>\n

\u201cWe anticipated seeing emissions in broad bands at the various levels. Instead, we\u2019ve seen fine-scaled patterns of beads and stars that, despite being separated by huge distances in altitude, may somehow be interconnected \u2013 and may also be linked to the famous hexagon deeper in Saturn\u2019s clouds. These features were completely unexpected and, at present, are completely unexplained.\u201d<\/p>\n

The discovery was made by an international collaboration of 23 researchers from the UK, US, and France, who observed Saturn for a continuous 10-hour stretch on November 29, 2024, while the planet rotated under JWST\u2019s gaze.<\/p>\n

\"Montage<\/a>Montage of stills from animation showing near infrared emissions in Saturn\u2019s stratosphere, revealing the four star-arm features flowing from the pole towards the equator, as the planet rotates beneath JWST\u2019s view. Credit: NASA\/ESA\/CSA\/Stallard et al 2025
\nHydrogen Ions and Methane Molecules Under the Lens<\/p>\n

The team focused on detecting infrared emissions by a positively charged molecular form of hydrogen, H3+, which plays a key role in reactions in Saturn\u2019s atmosphere and so can provide valuable insights into the chemical and physical processes at work. JWST\u2019s Near Infrared Spectrograph allowed the team to simultaneously observe H\u2083\u207a ions from the ionosphere, 1,100 kilometers above Saturn\u2019s nominal surface, and methane molecules in the underlying stratosphere, at an altitude of 600 kilometers.<\/p>\n

In the electrically charged plasma of the ionosphere, the team observed a series of dark, bead-like features embedded in bright auroral halos. These structures remained stable over hours but appeared to drift slowly over longer periods.<\/p>\n

This video of Saturn\u2019s stratosphere shows a complex and highly surprising star-shaped structure, revealed for the first time by JWST\u2019s unprecedented sensitivity. Four dark bands extend away from the polar region, appearing to make up four out of six arms that align with Saturn\u2019s famous hexagon within the lower atmosphere. At this point, it is unknown why the dark arms are flowing towards the equator, or why two of the arms are missing, but the causes may be associated with the complex bead structures observed many hundreds of kilometers above in the ionosphere. Credit: NASA\/ESA\/CSA\/Stallard et al 2025.<\/p>\n

Lopsided Star Over Saturn\u2019s North Pole<\/p>\n

Around 500 kilometers lower, in Saturn\u2019s stratosphere, the team discovered an asymmetric star-shaped feature. This unusual structure extended out from Saturn\u2019s north pole towards the equator. Only four of the star\u2019s six arms were visible, with two mysteriously missing, creating a lopsided pattern.<\/p>\n

\u201cSaturn\u2019s upper atmosphere has proven incredibly difficult to study with missions and telescope facilities to date due to the extremely weak emissions from this region,\u201d said Professor Stallard. \u201cJWST\u2019s incredible sensitivity has revolutionized our ability to observe these atmospheric layers, revealing structures that are completely unlike anything we\u2019ve seen before on any planet.\u201d<\/p>\n

\"Montage<\/a>Montage of stills from animation showing the dark, bead-like features embedded in bright auroral halos as Saturn rotates beneath JWST\u2019s view. Credit: NASA\/ESA\/CSA\/Stallard et al 2025
\nConnection to Saturn\u2019s Hexagon Storm<\/p>\n

The team mapped the exact locations of the features and found that they overlaid the same region of Saturn at different levels, with the star\u2019s arms appearing to emanate from positions directly above the points of the storm-cloud-level hexagon. This suggests that the processes that are driving the patterns may influence a column stretching right through Saturn\u2019s atmosphere.<\/p>\n

\u201cWe think that the dark beads may result from complex interactions between Saturn\u2019s magnetosphere and its rotating atmosphere, potentially providing new insights into the energy exchange that drives Saturn\u2019s aurora. The asymmetric star pattern suggests previously unknown atmospheric processes operating in Saturn\u2019s stratosphere, possibly linked to the hexagonal storm pattern observed deeper in Saturn\u2019s atmosphere,\u201d said Professor Stallard.<\/p>\n

This video of Saturn\u2019s ionosphere highlights the contrast in brightness between JWST\u2019s infrared observations of the aurora and the dim bead features. The aurora itself is relatively weak, almost impossible to image from Earth, needing hours of integration time to observe using ground-based data. However, the auroral features are at least four times brighter than the brightest parts of the dark bead features, so to properly show the hidden features, the aurora are completely saturated. Credit: NASA\/ESA\/CSA\/Stallard et al 2025.<\/p>\n

Coincidence or Cosmic Link?<\/p>\n

\u201cTantalizingly, the darkest beads in the ionosphere appear to line up with the strongest star-arm in the stratosphere, but it\u2019s not clear at this point whether they are actually linked or whether it\u2019s just a coincidence.\u201d<\/p>\n

While both features could have significant implications for understanding atmospheric dynamics on gas giant planets, more work is needed to provide explanations for the underlying causes.<\/p>\n

Seasonal Changes and Urgency for Follow-Up<\/p>\n

The team hopes that additional time may be granted in future to carry out follow-up observations of Saturn with JWST to further explore the features. With the planet at its equinox, which occurs approximately every 15 Earth years, the structures may change dramatically as Saturn\u2019s orientation to the Sun shifts and the northern hemisphere moves into autumn.<\/p>\n

\u201cSince neither atmospheric layer can be observed using ground-based telescopes, the need for JWST follow-up observations during this key time of seasonal change on Saturn is pressing,\u201d Stallard added.<\/p>\n

References:<\/p>\n

\u201cJWST\u2019s transformational observations of Giant Planet ionospheres\u201d by Tom Stallard, Henrik Melin, Luke Moore, Emma Thomas, Katie Knowles, Paola Tiranti and James O\u2019Donoghue, 8 July 2025, EPSC Abstracts.
DOI: 10.5194\/epsc-dps2025-817<\/a><\/p>\n

\u201cJWST\/NIRSpec Detection of Complex Structures in Saturn\u2019s Sub-Auroral Ionosphere and Stratosphere\u201d by Tom S. Stallard, Luke Moore, Henrik Melin, Omakshi Agiwal, M. Nahid Chowdhury, Rosie E. Johnson, Katie L. Knowles, Emma M. Thomas, Paola I. Tiranti, James O\u2019Donoghue, Khalid Mohamed, Ingo Mueller-Wodarg, Leigh Fletcher, Imke de Pater, Thierry Fouchet and Sarah V. Badman, 28 August 2025, Geophysical Research Letters.
DOI: 10.1029\/2025GL116491<\/a><\/p>\n

The Saturn research was supported by grants from the Science and Technology Facilities Council (STFC), NASA Solar System Workings program, and the European Research Council. The study represents part of JWST\u2019s ongoing revolutionary observations of our solar system\u2019s planets.<\/p>\n

Never miss a breakthrough: Join the SciTechDaily newsletter.<\/a><\/b><\/p>\n","protected":false},"excerpt":{"rendered":"Detections of near infrared emissions in Saturn\u2019s ionosphere (left) show dark bead-like features embedded within bright aurora. In…\n","protected":false},"author":2,"featured_media":77607,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[77],"tags":[582,1025,18,19,17,5923,52310,583,1434,133],"class_list":{"0":"post-77606","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-science","8":"tag-astronomy","9":"tag-astrophysics","10":"tag-eire","11":"tag-ie","12":"tag-ireland","13":"tag-james-webb-space-telescope","14":"tag-northumbria-university","15":"tag-planets","16":"tag-saturn","17":"tag-science"},"share_on_mastodon":{"url":"","error":""},"_links":{"self":[{"href":"https:\/\/www.europesays.com\/ie\/wp-json\/wp\/v2\/posts\/77606","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.europesays.com\/ie\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.europesays.com\/ie\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/ie\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/ie\/wp-json\/wp\/v2\/comments?post=77606"}],"version-history":[{"count":0,"href":"https:\/\/www.europesays.com\/ie\/wp-json\/wp\/v2\/posts\/77606\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/ie\/wp-json\/wp\/v2\/media\/77607"}],"wp:attachment":[{"href":"https:\/\/www.europesays.com\/ie\/wp-json\/wp\/v2\/media?parent=77606"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.europesays.com\/ie\/wp-json\/wp\/v2\/categories?post=77606"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.europesays.com\/ie\/wp-json\/wp\/v2\/tags?post=77606"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}