{"id":628849,"date":"2026-01-19T08:24:07","date_gmt":"2026-01-19T07:24:07","guid":{"rendered":"https:\/\/cronologia-universale.it\/october-9-2009\/"},"modified":"2026-01-19T08:24:07","modified_gmt":"2026-01-19T07:24:07","slug":"2004","status":"publish","type":"post","link":"https:\/\/cronologia-universale.it\/en\/2004\/","title":{"rendered":"2004"},"content":{"rendered":"<p>The galaxy cluster system 1E 0657-56, better known as the Bullet Cluster, in the constellation Carina, is the result of the head-on collision of two clusters of about 40 galaxies. The two dominant mass distributions can be explained by the hypothesis that the main fraction of the mass is in the form of dark matter.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The galaxy cluster system 1E 0657-56, better known as the Bullet Cluster, in the constellation&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[41],"tags":[],"class_list":["post-628849","post","type-post","status-publish","format-standard","hentry","category-s-en"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>2004 - Cronologia Universale<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/cronologia-universale.it\/en\/2004\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"2004 - 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