{"id":620099,"date":"2026-01-18T20:07:13","date_gmt":"2026-01-18T19:07:13","guid":{"rendered":"https:\/\/cronologia-universale.it\/1828-2\/"},"modified":"2026-01-18T20:07:14","modified_gmt":"2026-01-18T19:07:14","slug":"1813-3","status":"publish","type":"post","link":"https:\/\/cronologia-universale.it\/en\/1813-3\/","title":{"rendered":"1813"},"content":{"rendered":"

The German mathematician and physicist Carl Friedrich Gauss, knowing that a triangle in a curved space does not have a sum of 180 degrees, measured the angles at the vertices of the three Brocken mountains in the Harz (Northern Germany), the Inselberg in Thuringia, and Hohen Hagen near Dransfeld, southwest of G\u00f6ttingen. The sum was 180 degrees and 15″ (arc seconds). Further proof of the curvature of the Earth.<\/p>\n","protected":false},"excerpt":{"rendered":"

The German mathematician and physicist Carl Friedrich Gauss, knowing that a triangle in a curved…<\/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":[35],"tags":[],"class_list":["post-620099","post","type-post","status-publish","format-standard","hentry","category-ev-en"],"acf":[],"yoast_head":"\n1813 - 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\/1813-3\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"1813 - Cronologia Universale\" \/>\n<meta property=\"og:description\" content=\"The German mathematician and physicist Carl Friedrich Gauss, knowing that a triangle in a curved...\" \/>\n<meta property=\"og:url\" content=\"https:\/\/cronologia-universale.it\/en\/1813-3\/\" \/>\n<meta property=\"og:site_name\" content=\"Cronologia Universale\" \/>\n<meta property=\"article:published_time\" content=\"2026-01-18T19:07:13+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-01-18T19:07:14+00:00\" \/>\n<meta name=\"author\" content=\"Rick\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Rick\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/cronologia-universale.it\/en\/1813-3\/\",\"url\":\"https:\/\/cronologia-universale.it\/en\/1813-3\/\",\"name\":\"1813 - Cronologia Universale\",\"isPartOf\":{\"@id\":\"https:\/\/cronologia-universale.it\/#website\"},\"datePublished\":\"2026-01-18T19:07:13+00:00\",\"dateModified\":\"2026-01-18T19:07:14+00:00\",\"author\":{\"@id\":\"https:\/\/cronologia-universale.it\/#\/schema\/person\/f510f53010edc7a70b16caecf1c4af03\"},\"breadcrumb\":{\"@id\":\"https:\/\/cronologia-universale.it\/en\/1813-3\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/cronologia-universale.it\/en\/1813-3\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/cronologia-universale.it\/en\/1813-3\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/cronologia-universale.it\/en\/universal-cronology\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"1813\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/cronologia-universale.it\/#website\",\"url\":\"https:\/\/cronologia-universale.it\/\",\"name\":\"Cronologia Universale\",\"description\":\"\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/cronologia-universale.it\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/cronologia-universale.it\/#\/schema\/person\/f510f53010edc7a70b16caecf1c4af03\",\"name\":\"Rick\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/cronologia-universale.it\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/7f707c665808696c8fa12345661bf0ef3aa60982ce3781ec6cc5b16b7b828ba8?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/7f707c665808696c8fa12345661bf0ef3aa60982ce3781ec6cc5b16b7b828ba8?s=96&d=mm&r=g\",\"caption\":\"Rick\"},\"sameAs\":[\"http:\/\/cronologia-universale.it\"],\"url\":\"https:\/\/cronologia-universale.it\/en\/author\/rick\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"1813 - Cronologia Universale","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/cronologia-universale.it\/en\/1813-3\/","og_locale":"en_US","og_type":"article","og_title":"1813 - Cronologia Universale","og_description":"The German mathematician and physicist Carl Friedrich Gauss, knowing that a triangle in a curved...","og_url":"https:\/\/cronologia-universale.it\/en\/1813-3\/","og_site_name":"Cronologia Universale","article_published_time":"2026-01-18T19:07:13+00:00","article_modified_time":"2026-01-18T19:07:14+00:00","author":"Rick","twitter_card":"summary_large_image","twitter_misc":{"Written by":"Rick"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/cronologia-universale.it\/en\/1813-3\/","url":"https:\/\/cronologia-universale.it\/en\/1813-3\/","name":"1813 - Cronologia Universale","isPartOf":{"@id":"https:\/\/cronologia-universale.it\/#website"},"datePublished":"2026-01-18T19:07:13+00:00","dateModified":"2026-01-18T19:07:14+00:00","author":{"@id":"https:\/\/cronologia-universale.it\/#\/schema\/person\/f510f53010edc7a70b16caecf1c4af03"},"breadcrumb":{"@id":"https:\/\/cronologia-universale.it\/en\/1813-3\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/cronologia-universale.it\/en\/1813-3\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/cronologia-universale.it\/en\/1813-3\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/cronologia-universale.it\/en\/universal-cronology\/"},{"@type":"ListItem","position":2,"name":"1813"}]},{"@type":"WebSite","@id":"https:\/\/cronologia-universale.it\/#website","url":"https:\/\/cronologia-universale.it\/","name":"Cronologia Universale","description":"","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/cronologia-universale.it\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Person","@id":"https:\/\/cronologia-universale.it\/#\/schema\/person\/f510f53010edc7a70b16caecf1c4af03","name":"Rick","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/cronologia-universale.it\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/7f707c665808696c8fa12345661bf0ef3aa60982ce3781ec6cc5b16b7b828ba8?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/7f707c665808696c8fa12345661bf0ef3aa60982ce3781ec6cc5b16b7b828ba8?s=96&d=mm&r=g","caption":"Rick"},"sameAs":["http:\/\/cronologia-universale.it"],"url":"https:\/\/cronologia-universale.it\/en\/author\/rick\/"}]}},"_links":{"self":[{"href":"https:\/\/cronologia-universale.it\/en\/wp-json\/wp\/v2\/posts\/620099","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cronologia-universale.it\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cronologia-universale.it\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cronologia-universale.it\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/cronologia-universale.it\/en\/wp-json\/wp\/v2\/comments?post=620099"}],"version-history":[{"count":2,"href":"https:\/\/cronologia-universale.it\/en\/wp-json\/wp\/v2\/posts\/620099\/revisions"}],"predecessor-version":[{"id":685230,"href":"https:\/\/cronologia-universale.it\/en\/wp-json\/wp\/v2\/posts\/620099\/revisions\/685230"}],"wp:attachment":[{"href":"https:\/\/cronologia-universale.it\/en\/wp-json\/wp\/v2\/media?parent=620099"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cronologia-universale.it\/en\/wp-json\/wp\/v2\/categories?post=620099"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cronologia-universale.it\/en\/wp-json\/wp\/v2\/tags?post=620099"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}