{"id":64020,"date":"2025-11-09T18:26:23","date_gmt":"2025-11-09T18:26:23","guid":{"rendered":"https:\/\/www.africa-press.net\/lesotho\/all-news\/universe-may-have-already-begun-slowing-new-study-suggests"},"modified":"2025-11-09T19:13:48","modified_gmt":"2025-11-09T19:13:48","slug":"universe-may-have-already-begun-slowing-new-study-suggests","status":"publish","type":"post","link":"https:\/\/www.africa-press.net\/lesotho\/all-news\/universe-may-have-already-begun-slowing-new-study-suggests","title":{"rendered":"Universe may have already Begun Slowing, New Study Suggests"},"content":{"rendered":"

Africa-Press – Lesotho. <\/strong><\/span>The universe may no longer be racing apart, and cosmic expansion could already be slowing down\u2014overturning one of modern cosmology\u2019s most fundamental assumptions, according to a new study.<\/p>\n

The study was published Thursday in the Monthly Notices of the Royal Astronomical Society.<\/p>\n

\u201cOur study shows that the universe has already entered a phase of decelerated expansion at the present epoch and that dark energy evolves with time much more rapidly than previously thought,\u201d said Professor Young-Wook Lee of Yonsei University in South Korea, who led the research.<\/p>\n

\u201cIf these results are confirmed, it would mark a major paradigm shift in cosmology since the discovery of dark energy 27 years ago,\u201d he added.<\/p>\n

For nearly three decades, scientists have believed the universe\u2019s expansion was accelerating due to dark energy\u2014a mysterious force that earned the 2011 Nobel Prize in Physics. But Lee\u2019s team found no convincing evidence of continued acceleration.<\/p>\n

By analyzing data from 300 galaxies, the researchers discovered that the supernovae used to measure cosmic distances\u2014once thought to be reliable \u201cstandard candles\u201d\u2014actually vary in brightness depending on the age of their host stars.<\/p>\n

After correcting for the bias, the data no longer supported the standard cosmological model (\u039bCDM) but rather matched findings from the Dark Energy Spectroscopic Instrument (DESI) project, which indicate dark energy is weakening over time.<\/p>\n

\u201cIn the DESI project, results showed the universe would decelerate in the future,\u201d Lee said. \u201cBy contrast, our analysis shows it has already entered a decelerating phase today.\u201d<\/p>\n

The team plans further tests using upcoming data from the Vera C. Rubin Observatory in Chile, which will identify tens of thousands of new supernovae in the next few years.<\/p>\n

As research co-lead Chul Chung put it, \u201cPrecise age measurements will allow for a far more robust and definitive test of supernova cosmology.\u201d<\/p>\n

If confirmed, the findings could force scientists to rewrite what they know about dark energy\u2014and the ultimate fate of the universe itself.<\/p>\n

For More News And Analysis About Lesotho<\/span> Follow Africa-Press<\/span><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"

Africa-Press – Lesotho. The universe may no longer be racing apart, and cosmic expansion could already be slowing down\u2014overturning one of modern cosmology\u2019s most fundamental assumptions, according to a new study. The study was published Thursday in the Monthly Notices of the Royal Astronomical Society. \u201cOur study shows that the universe has already entered a […]<\/p>\n","protected":false},"author":84,"featured_media":64019,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2,9],"tags":[1770,6794,6792,6795,245,6793,6796],"class_list":["post-64020","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-all-news","category-miscellaneous","tag-astronomy","tag-cosmic-expansion","tag-cosmology","tag-dark-energy-spectroscopic-instrument-desi","tag-lesotho","tag-monthly-notices-of-the-royal-astronomical-society","tag-yonsei-university"],"yoast_head":"\nUniverse may have already Begun Slowing, New Study Suggests - Lesotho<\/title>\n<meta name=\"description\" content=\"The universe may no longer be racing apart, and cosmic expansion could already be slowing down\u2014overturning one of modern ...\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.africa-press.net\/lesotho\/all-news\/universe-may-have-already-begun-slowing-new-study-suggests\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Universe may have already Begun Slowing, New Study Suggests\" \/>\n<meta property=\"og:description\" content=\"The universe may no longer be racing apart, and cosmic expansion could already be slowing down\u2014overturning one of modern ...\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.africa-press.net\/lesotho\/all-news\/universe-may-have-already-begun-slowing-new-study-suggests\" \/>\n<meta property=\"og:site_name\" content=\"Lesotho\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/AfricaPressTunisiaa\" \/>\n<meta property=\"article:published_time\" content=\"2025-11-09T18:26:23+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-11-09T19:13:48+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/static.africa-press.net\/lesotho\/sites\/62\/2025\/11\/sm_1762702928.561951.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"864\" \/>\n\t<meta property=\"og:image:height\" content=\"486\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"cfeditoren\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"cfeditoren\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.africa-press.net\/lesotho\/all-news\/universe-may-have-already-begun-slowing-new-study-suggests#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.africa-press.net\/lesotho\/all-news\/universe-may-have-already-begun-slowing-new-study-suggests\"},\"author\":{\"name\":\"cfeditoren\",\"@id\":\"https:\/\/www.africa-press.net\/lesotho\/#\/schema\/person\/068c7ab4e9634ae78ec5d54ec46598bb\"},\"headline\":\"Universe may have already Begun Slowing, New Study Suggests\",\"datePublished\":\"2025-11-09T18:26:23+00:00\",\"dateModified\":\"2025-11-09T19:13:48+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.africa-press.net\/lesotho\/all-news\/universe-may-have-already-begun-slowing-new-study-suggests\"},\"wordCount\":346,\"commentCount\":0,\"image\":{\"@id\":\"https:\/\/www.africa-press.net\/lesotho\/all-news\/universe-may-have-already-begun-slowing-new-study-suggests#primaryimage\"},\"thumbnailUrl\":\"https:\/\/static.africa-press.net\/lesotho\/sites\/62\/2025\/11\/sm_1762702928.561951.jpg\",\"keywords\":[\"Astronomy\",\"cosmic expansion\",\"cosmology\",\"Dark Energy Spectroscopic Instrument (DESI)\",\"Lesotho\",\"Monthly Notices of the Royal Astronomical Society\",\"Yonsei University\"],\"articleSection\":[\"all news\",\"miscellaneous\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/www.africa-press.net\/lesotho\/all-news\/universe-may-have-already-begun-slowing-new-study-suggests#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.africa-press.net\/lesotho\/all-news\/universe-may-have-already-begun-slowing-new-study-suggests\",\"url\":\"https:\/\/www.africa-press.net\/lesotho\/all-news\/universe-may-have-already-begun-slowing-new-study-suggests\",\"name\":\"Universe may have already Begun Slowing, New Study Suggests - 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