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{"id":133,"date":"2025-07-08T13:06:52","date_gmt":"2025-07-08T13:06:52","guid":{"rendered":"https:\/\/imbrighiri.com\/?p=133"},"modified":"2025-07-08T13:06:53","modified_gmt":"2025-07-08T13:06:53","slug":"the-james-webb-telescope-and-the-first-alarm-of-cosmology","status":"publish","type":"post","link":"https:\/\/imbrighiri.com\/?p=133","title":{"rendered":"The James Webb Telescope and the First Alarm of Cosmology"},"content":{"rendered":"\n<p>Launched in December 2021, the JWST deployed a 6.5 m diameter mirror and entered a halo orbit around the L2 Lagrange point. Cooled to -233 \u00b0C, the instruments sense infrared radiation from galaxies that appeared just 300 million years after the Big Bang.<\/p>\n\n\n\n<!--nextpage-->\n\n\n\n<p>In 2023, the observatory discovered six ultra-compact &#8220;red dots&#8221; whose mass, according to initial estimates, is comparable to the Milky Way. Such a number of stars in such a short time contradicts the standard cosmological model \u039bCDM, where the growth of galaxies should be slower.<\/p>\n\n\n\n<p>Astronomers debate whether these are calibration errors or a signal that dark matter and energy behave differently than previously thought. In the coming years, JWST will conduct deep spectral analysis, and the ground-based Extremely Large Telescope and Thirty Meter Telescope will confirm or deny the \u201calarm,\u201d which could reshape our understanding of the evolution of the Universe.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Launched in December 2021, the JWST deployed a 6.5 m diameter mirror and entered a halo orbit around the L2 Lagrange point. Cooled to -233 \u00b0C, the instruments sense infrared&hellip;<\/p>\n","protected":false},"author":2,"featured_media":126,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[30],"tags":[],"class_list":["post-133","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-science"],"_links":{"self":[{"href":"https:\/\/imbrighiri.com\/index.php?rest_route=\/wp\/v2\/posts\/133","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/imbrighiri.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/imbrighiri.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/imbrighiri.com\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/imbrighiri.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=133"}],"version-history":[{"count":1,"href":"https:\/\/imbrighiri.com\/index.php?rest_route=\/wp\/v2\/posts\/133\/revisions"}],"predecessor-version":[{"id":134,"href":"https:\/\/imbrighiri.com\/index.php?rest_route=\/wp\/v2\/posts\/133\/revisions\/134"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/imbrighiri.com\/index.php?rest_route=\/wp\/v2\/media\/126"}],"wp:attachment":[{"href":"https:\/\/imbrighiri.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=133"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/imbrighiri.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=133"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/imbrighiri.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=133"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}