{"id":3833,"date":"2026-06-12T13:33:10","date_gmt":"2026-06-12T13:33:10","guid":{"rendered":"https:\/\/terrarara.com.br\/en\/?page_id=3833"},"modified":"2026-06-12T13:33:10","modified_gmt":"2026-06-12T13:33:10","slug":"um-universo-sem-energia-escura-matematicos-desafiam-o-modelo-padrao-da-cosmologia","status":"publish","type":"page","link":"https:\/\/terrarara.com.br\/en\/?page_id=3833","title":{"rendered":"A universe without dark energy? mathematicians challenge the standard model of cosmology"},"content":{"rendered":"<div class=\"wp-block-image\"><figure><img decoding=\"async\" src=\"https:\/\/sinapsees.com\/img\/sites\/img_materia_escura8.jpg\" alt=\"\" style=\"width:100%\"><figcaption>This composite image features one of the most complicated and dramatic collisions between galaxy clusters ever seen. Known officially as Abell 2744, this system has been dubbed Pandora&#8221;s Cluster because of the wide variety of different structures found. Data from NASA&#8217;s Chandra X-ray Observatory (red) show gas with temperatures of millions of degrees. In blue is a map showing the total mass concentration (mostly dark matter) based on data from NASA&#8217;s Hubble Space Telescope, the VLT (Very Large Telescope), and the Subaru telescope. Optical data from Hubble and VLT also show the constituent galaxies of the clusters. Astronomers think at least four galaxy clusters coming from a variety of directions are involved with this collision.<\/figcaption><\/figure><\/div><hr><\/p><p class=\"wp-block-paragraph\">\r\n\t<a href=\"https:\/\/doi.org\/10.1098\/rspa.2025.0912\" target=\"_blank\">doi.org\/10.1098\/rspa.2025.0912<\/a><br><a href=\"https:\/\/sinapsees.com\/credibilidade_estudo.php?c=42125\">Credibility<\/a>: <font color=\"#00FFFF\">9<\/font><font color=\"#00FF00\">8<\/font><font color=\"#FFFF00\">9<\/font><br><a href='http:\/\/terrarara.com.br\/en\"s=dark energy'>#Dark Energy<\/a><\/p><p><\/p><p>\r\n\t<!-- audio --><\/p><p>\r\n<button onclick=\"this.nextElementSibling.play()\" style=\"padding:12px 25px; font-size:18px; border:none; border-radius:8px; cursor:pointer;\">Listen<\/button><audio src=\"https:\/\/sinapsees.com\/audios\/42125-eng.mp3\" preload=\"none\"><\/audio><\/p><p>\r\n\t<strong>Mathematicians are questioning whether dark energy truly exists<\/strong><\/p><p> A new study suggests that the accelerating expansion of the universe can be explained without it, shaking the foundations of the current cosmological model.\r\n<\/p><p>\r\nResearchers at the University of California, Davis, published an analysis in the journal &#8220;Proceedings of the Royal Society A&#8221;.<\/p><p>\r\nThey show that Einstein&#8217;s equations combined with fluid dynamics (known as the Einstein-Euler equations) reveal instabilities in the standard model of the expanding universe.<\/p><p>\r\nThese equations are used to describe galaxies, black holes, and the cosmos itself.\r\n<\/p><p>\r\nThe dominant model today is Lambda-CDM, which includes cold dark matter and the famous dark energy to explain why the universe is expanding faster and faster.<\/p><p>\r\nBut, according to the authors, this model is unstable, like a pencil balanced on its tip: it seems like a perfect solution to the equations, but any small perturbation knocks it down.<\/p><p>\r\nUnstable solutions, in physics, are not considered real because we have never observed them in nature.<\/p><p>\r\nBlake Temple, professor emeritus of mathematics and lead author of the study, explains that Friedmann spacetimes-the mathematical models that describe the uniform expansion of the universe-are particularly unstable, both at small and large scales, especially near the Big Bang.<\/p><p>\r\nThis suggests a simpler and more natural explanation, which falls entirely within Einstein&#8217;s theory of gravity, without needing to add dark energy.\r\n<\/p><p>\r\nDark energy was proposed about 30 years ago to justify the observed acceleration.<\/p><p>\r\nThe idea dates back to Einstein himself, who in 1915 introduced a &#8220;cosmological constant&#8221; to try to keep the universe static.<\/p><p>\r\nAfter Hubble discovered the expansion, Einstein called it his biggest mistake.<\/p><p>\r\nDecades later, in the 1990s, the constant was revived and associated with dark energy.<\/p><p>\r\nThe researchers investigated alternatives and used self-similar versions of Einstein&#8217;s equations (which maintain the same pattern at different scales).<\/p><p>\r\nThey concluded that the acceleration arises naturally from the equations, without the need for a cosmological constant or dark energy.<\/p><p>\r\nFurthermore, the study challenges the Copernican principle, which states that the Earth (or our position) does not occupy a special place in the universe.<\/p><p>\r\nAccording to them, both the current model and a spherically symmetrical distribution would require us to be in a privileged position for everything to make sense.\r\n<\/p><p>\r\nIn short, the Big Bang may resemble the Friedmann model near the center, but further away, we observe natural accelerations.<\/p><p>\r\nThis paves the way for simpler explanations, based solely on Einstein&#8217;s general relativity, without invoking mysterious components such as dark energy.<\/p><p>\r\nThe work was funded by institutions in the United Kingdom and the United States and brings a new perspective to understanding the cosmos.\r\n<\/p><p>\r\n<blockquote class=\"twitter-tweet\" data-media-max-width=\"560\"><p lang=\"en\" dir=\"ltr\">??<br>A universe without dark energy? mathematicians challenge the standard model of cosmology<a href=\"https:\/\/x.com\/hashtag\/DarkEnergy'src=hash&amp;ref_src=twsrc%5Etfw\">#DarkEnergy<\/a><br><br>Mathematicians are questioning whether dark energy truly exists<br>Read more:<a href=\"https:\/\/t.co\/cuXkPSp6hU\">https:\/\/t.co\/cuXkPSp6hU<\/a> <a href=\"https:\/\/t.co\/4tfScVZkCV\">pic.twitter.com\/4tfScVZkCV<\/a><\/p>&mdash; Rare Earth (@rareearth0) <a href=\"https:\/\/x.com\/rareearth0\/status\/2066065143012679706?ref_src=twsrc%5Etfw\">June 14, 2026<\/a><\/blockquote> <script async src=\"https:\/\/platform.x.com\/widgets.js\" charset=\"utf-8\"><\/script>\r\n<hr>\r\n\r\n<p class=\"wp-block-paragraph\" style=\"text-align:right\"><em>Published in 06\/12\/2026 13h33<\/em><\/p>\r\n<hr>\r\n<p style=\"text-align:right\"><em><a href=\"https:\/\/terrarara.com.br\/?page_id=26710\">Portuguese version<\/a><\/em><\/p>\r\n<hr>\r\n\r\n\t\t<p class=\"wp-block-paragraph\">Text adapted by AI (Grok) and translated via Google API in the English version. Images from public image libraries or credits in the caption. Information about DOI, author and institution can be found in the body of the article.<\/p>\r\n\t\t<hr>\r\n\t\t<p>Reference article:<\/p>\r\n\t\t\r\n\t\t\r\n\r\n\r\n<ul class=\"wp-block-list\"><li><a href=\"https:\/\/scitechdaily.com\/a-universe-without-dark-energy-mathematicians-challenge-standard-cosmology\/\" target=\"_blank\">https:\/\/scitechdaily.com\/a-universe-without-dark-energy-mathematicians-challenge-standard-cosmology\/<\/a><\/li><\/ul>\r\n\r\n\r\n<p class=\"wp-block-paragraph\">Original study: <\/p>\r\n\r\n\r\n\r\n<ul class=\"wp-block-list\"><li><a href=\"https:\/\/doi.org\/10.1098\/rspa.2025.0912\" target=\"_blank\">https:\/\/doi.org\/10.1098\/rspa.2025.0912<\/a><\/li><\/ul>\r\n\r\n\r\n\r\n<hr class=\"wp-block-separator is-style-wide\"\/>\r\n\r\n<div style=\"position: buttonline;\"><iframe loading=\"lazy\" src=\"https:\/\/sinapsees.com\/rodape_sites.php?arg=42125\" frameborder=\"0\" height=\"420px\" width=\"100%\"><\/iframe><\/div>\r\n<div style=\"position: buttonline;\"><iframe loading=\"lazy\" src=\"https:\/\/sinapsees.com\/comentario_navegacao.php?arg=42125\" frameborder=\"0\" height=\"500px\" width=\"100%\"><\/iframe><\/div>\r\n<div style=\"position:absolute; width:40%; height:70px; top:-70px; left:0px;\"><iframe loading=\"lazy\" src=\"https:\/\/sinapsees.com\/oferta_site_esq.php?arg=42125\" frameborder=\"0\" height=\"100%\" width=\"100%\"><\/iframe><\/div>\r\n<div style=\"position:absolute; width:40%; height:70px; top:-70px; right:0px;\"><iframe loading=\"lazy\" src=\"https:\/\/sinapsees.com\/oferta_site_dir.php?arg=42125\" frameborder=\"0\" height=\"100%;\" width=\"100%\"><\/iframe><\/div>\r\n\r\n\r\n<div class=\"wp-block-image\"><figure><iframe loading=\"lazy\" src=\"https:\/\/sinapsees.com\/oferta_site_centralus.php\" width=\"100%\" height=\"330\" frameborder=\"0\"><\/iframe><figcaption>{teste}<\/figcaption><\/figure><\/div><hr>","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":0,"parent":71,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-3833","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/terrarara.com.br\/en\/index.php?rest_route=\/wp\/v2\/pages\/3833","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/terrarara.com.br\/en\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/terrarara.com.br\/en\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/terrarara.com.br\/en\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/terrarara.com.br\/en\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3833"}],"version-history":[{"count":0,"href":"https:\/\/terrarara.com.br\/en\/index.php?rest_route=\/wp\/v2\/pages\/3833\/revisions"}],"up":[{"embeddable":true,"href":"https:\/\/terrarara.com.br\/en\/index.php?rest_route=\/wp\/v2\/pages\/71"}],"wp:attachment":[{"href":"https:\/\/terrarara.com.br\/en\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3833"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}