{"id":619251,"date":"2026-01-18T19:38:12","date_gmt":"2026-01-18T18:38:12","guid":{"rendered":"https:\/\/cronologia-universale.it\/1776-2\/"},"modified":"2026-01-18T19:38:12","modified_gmt":"2026-01-18T18:38:12","slug":"1728","status":"publish","type":"post","link":"https:\/\/cronologia-universale.it\/en\/1728\/","title":{"rendered":"1728"},"content":{"rendered":"<p>James Bradley discovered the Earth&#8217;s 18-year nutation motion. It would be necessary to wait longer to have the physical explanation demonstrated and precisely calculated. Jean-Baptiste d&#8217;Alambert and Leonhard Euler would precisely calculate the motion of the ellipsoidal Earth, deriving the precession of the equinoxes as 25,800 years, as Newton had already done (but already discovered by Hipparchus), and the 18-year nutation.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>James Bradley discovered the Earth&#8217;s 18-year nutation motion. It would be necessary to wait longer&#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":[36],"tags":[],"class_list":["post-619251","post","type-post","status-publish","format-standard","hentry","category-fc-en"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>1728 - 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\/1728\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"1728 - Cronologia Universale\" \/>\n<meta property=\"og:description\" content=\"James Bradley discovered the Earth&#8217;s 18-year nutation motion. 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