{"id":621311,"date":"2026-01-18T20:48:20","date_gmt":"2026-01-18T19:48:20","guid":{"rendered":"https:\/\/cronologia-universale.it\/november-27-1872\/"},"modified":"2026-01-18T20:48:20","modified_gmt":"2026-01-18T19:48:20","slug":"1864-1866","status":"publish","type":"post","link":"https:\/\/cronologia-universale.it\/en\/1864-1866\/","title":{"rendered":"1864 &#8211; 1866"},"content":{"rendered":"<p>Giovanni Battista Donati and William Huggins were the first scientists to discover concrete clues about the composition of comets. They analyzed the spectrum of Comet Temple, and then of Comet Temple Tuttle, and found traces of carbon molecules. They didn&#8217;t know it, but they had seen CN, C2, and C3.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Giovanni Battista Donati and William Huggins were the first scientists to discover concrete clues about&#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":[33],"tags":[],"class_list":["post-621311","post","type-post","status-publish","format-standard","hentry","category-cs-en"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>1864 - 1866 - 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\/1864-1866\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"1864 - 1866 - Cronologia Universale\" \/>\n<meta property=\"og:description\" content=\"Giovanni Battista Donati and William Huggins were the first scientists to discover concrete clues about...\" \/>\n<meta property=\"og:url\" content=\"https:\/\/cronologia-universale.it\/en\/1864-1866\/\" \/>\n<meta property=\"og:site_name\" content=\"Cronologia Universale\" \/>\n<meta property=\"article:published_time\" content=\"2026-01-18T19:48:20+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\/1864-1866\/\",\"url\":\"https:\/\/cronologia-universale.it\/en\/1864-1866\/\",\"name\":\"1864 - 1866 - Cronologia Universale\",\"isPartOf\":{\"@id\":\"https:\/\/cronologia-universale.it\/#website\"},\"datePublished\":\"2026-01-18T19:48:20+00:00\",\"author\":{\"@id\":\"https:\/\/cronologia-universale.it\/#\/schema\/person\/f510f53010edc7a70b16caecf1c4af03\"},\"breadcrumb\":{\"@id\":\"https:\/\/cronologia-universale.it\/en\/1864-1866\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/cronologia-universale.it\/en\/1864-1866\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/cronologia-universale.it\/en\/1864-1866\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/cronologia-universale.it\/en\/universal-cronology\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"1864 &#8211; 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