{"id":374501,"date":"2026-10-26T17:56:14","date_gmt":"2026-10-26T12:26:14","guid":{"rendered":"https:\/\/forumias.com\/blog\/?p=374501"},"modified":"2026-10-26T17:56:14","modified_gmt":"2026-10-26T12:26:14","slug":"ariel-and-umbriel","status":"publish","type":"post","link":"https:\/\/forumias.com\/blog\/ariel-and-umbriel\/","title":{"rendered":"Ariel and Umbriel"},"content":{"rendered":"<div class=\"content-box-green\">\n<p><strong>News:<\/strong> October 24 marks the discovery anniversary of Ariel and Umbriel, two major inner moons of Uranus, discovered in 1851.<\/p>\n<\/div>\n<h2 class=\"red-h2-box\">About Ariel and Umbriel<\/h2>\n<figure id=\"attachment_374505\" aria-describedby=\"caption-attachment-374505\" style=\"width: 371px\" class=\"wp-caption aligncenter\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" class=\" wp-image-374505\" src=\"https:\/\/i0.wp.com\/forumias.com\/blog\/wp-content\/uploads\/2026\/10\/Source-Sci-News.jpg?resize=371%2C229&#038;ssl=1\" alt=\"Ariel and Umbriel\" width=\"371\" height=\"229\" srcset=\"https:\/\/i0.wp.com\/forumias.com\/blog\/wp-content\/uploads\/2026\/10\/Source-Sci-News.jpg?resize=300%2C185&amp;ssl=1 300w, https:\/\/i0.wp.com\/forumias.com\/blog\/wp-content\/uploads\/2026\/10\/Source-Sci-News.jpg?resize=1024%2C631&amp;ssl=1 1024w, https:\/\/i0.wp.com\/forumias.com\/blog\/wp-content\/uploads\/2026\/10\/Source-Sci-News.jpg?resize=768%2C473&amp;ssl=1 768w, https:\/\/i0.wp.com\/forumias.com\/blog\/wp-content\/uploads\/2026\/10\/Source-Sci-News.jpg?w=1029&amp;ssl=1 1029w\" sizes=\"auto, (max-width: 371px) 100vw, 371px\" \/><figcaption id=\"caption-attachment-374505\" class=\"wp-caption-text\">Source &#8211; Sci News<\/figcaption><\/figure>\n<ul>\n<li><strong>Ariel and Umbriel<\/strong> are two of the <strong>major inner moons of Uranus,<\/strong> which <strong>had 29 officially recognised moons as of August 2026.<\/strong><\/li>\n<li><strong>Discovery:<\/strong> British astronomer <strong>William Lassell<\/strong> discovered both moons on October 24, 1851.<\/li>\n<li><strong>Naming:\u00a0<\/strong>\n<ul>\n<li><strong>Ariel: <\/strong>It\u00a0is the name for a <strong>character in both Shakespeare&#8217;s &#8220;The Tempest&#8221;<\/strong> and <strong>Alexander Pope&#8217;s poem \u201cThe Rape of the Lock.\u201d<\/strong><\/li>\n<li><strong>Umbriel:<\/strong> It is named for a malevolent <strong>spirit in English poet Alexander Pope&#8217;s 18th century poem &#8220;Rape of the Lock.&#8221;<\/strong><\/li>\n<\/ul>\n<\/li>\n<li><strong>Key Features<\/strong>\n<ul>\n<li>\u00a0<strong>Ariel:<\/strong>\n<ul>\n<li><strong>Size:<\/strong> Ariel is the <strong>fourth-largest moon of Uranus.<\/strong><\/li>\n<li><strong>Composition:<\/strong> It mainly consists of <strong>roughly equal amounts of water ice and silicate rock.<\/strong>\n<ul>\n<li><strong>Carbon dioxide has also been detected.<\/strong><\/li>\n<\/ul>\n<\/li>\n<li><strong>Surface:<\/strong> It has the <strong>brightest and youngest-looking surface among Uranus&#8217; five largest moons.<\/strong><\/li>\n<li><strong>Orbit:<\/strong> Like Earth&#8217;s Moon, <strong>Ariel keeps the same face towards Uranus as it orbits the planet.<\/strong><\/li>\n<\/ul>\n<\/li>\n<li><strong>Umbriel:<\/strong>\n<ul>\n<li><strong>Size:<\/strong> It is the <strong>third-largest moon of Uranus.<\/strong><\/li>\n<li><strong>Surface:<\/strong> It is the <strong>darkest of Uranus&#8217; five major moons<\/strong> and has many old, large craters.<\/li>\n<li><strong>Reflectivity:<\/strong> It <strong>reflects only 16% of the light striking<\/strong> its surface.<\/li>\n<li><strong>Bright Ring:<\/strong> It has a <strong>mysterious bright ring about 140 km in diameter on its dark surface<\/strong>.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>News: October 24 marks the discovery anniversary of Ariel and Umbriel, two major inner moons of Uranus, discovered in 1851. About Ariel and Umbriel Ariel and Umbriel are two of the major inner moons of Uranus, which had 29 officially recognised moons as of August 2026. Discovery: British astronomer William Lassell discovered both moons on&hellip; <a class=\"more-link\" href=\"https:\/\/forumias.com\/blog\/ariel-and-umbriel\/\">Continue reading <span class=\"screen-reader-text\">Ariel and Umbriel<\/span><\/a><\/p>\n","protected":false},"author":10401,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"footnotes":""},"categories":[1566,1738,12039],"tags":[11872],"class_list":["post-374501","post","type-post","status-publish","format-standard","hentry","category-daily-factly-articles","category-science-and-technology-daily-factly-articles","category-knolls","tag-9pm-daily-factly","entry"],"jetpack_featured_media_url":"","views":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/forumias.com\/blog\/wp-json\/wp\/v2\/posts\/374501","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/forumias.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/forumias.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/forumias.com\/blog\/wp-json\/wp\/v2\/users\/10401"}],"replies":[{"embeddable":true,"href":"https:\/\/forumias.com\/blog\/wp-json\/wp\/v2\/comments?post=374501"}],"version-history":[{"count":0,"href":"https:\/\/forumias.com\/blog\/wp-json\/wp\/v2\/posts\/374501\/revisions"}],"wp:attachment":[{"href":"https:\/\/forumias.com\/blog\/wp-json\/wp\/v2\/media?parent=374501"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/forumias.com\/blog\/wp-json\/wp\/v2\/categories?post=374501"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/forumias.com\/blog\/wp-json\/wp\/v2\/tags?post=374501"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}