{"id":118,"date":"2015-10-03T18:51:31","date_gmt":"2015-10-03T18:51:31","guid":{"rendered":"https:\/\/sciences.ucf.edu\/physics\/walkaboutthegalaxy\/?p=118"},"modified":"2022-03-15T14:39:26","modified_gmt":"2022-03-15T14:39:26","slug":"the-amniotic-sac-of-a-star","status":"publish","type":"post","link":"https:\/\/sciences.ucf.edu\/physics\/walkaboutthegalaxy\/2015\/10\/the-amniotic-sac-of-a-star\/","title":{"rendered":"The Amniotic Sac of a Star"},"content":{"rendered":"<p>Most planetary systems discovered so far have relatively little in common with our own. The planets are generally tightly packed around their star making them hot and inhospitable. Most planets are significantly larger than the Earth, and there are a significant number of &#8220;super-Earths&#8221;, planets in between Earth and Neptune in size. While many of these differences are due to observational selection effects (it&#8217;s much easier to see planets that are big and close to their star than it is to see a planet like the Earth which is small and relatively distant), after accounting for the selection bias planets like Earth seem to be less common than we thought ten or 20 years ago. In <a href=\"http:\/\/walkaboutthegalaxy.libsyn.com\/stellar-amniotic-sacs\">this episode of Walkabout the Galaxy<\/a> we discuss observations indicating a relatively large <a href=\"http:\/\/www.eurekalert.org\/pub_releases\/2015-09\/uol-api091015.php\">planet has formed around a very young star<\/a> at a distance along the lines of the Sun-Saturn distance. Perhaps this system will one day look like our own. <\/p>\n","protected":false},"excerpt":{"rendered":"<p>Most planetary systems discovered so far have relatively little in common with our own. The planets are generally tightly packed around their star making them hot and inhospitable. Most planets are significantly larger than the&#8230;<\/p>\n<div class=\"more-link-wrapper\"><a class=\"more-link\" href=\"https:\/\/sciences.ucf.edu\/physics\/walkaboutthegalaxy\/2015\/10\/the-amniotic-sac-of-a-star\/\">Read More<span class=\"screen-reader-text\">The Amniotic Sac of a Star<\/span><\/a><\/div>\n","protected":false},"author":28,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[3],"tags":[],"class_list":["post-118","post","type-post","status-publish","format-standard","hentry","category-episodes","excerpt","full-without-featured","even","excerpt-0"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>The Amniotic Sac of a Star - Walkabout the Galaxy<\/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:\/\/sciences.ucf.edu\/physics\/walkaboutthegalaxy\/2015\/10\/the-amniotic-sac-of-a-star\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"The Amniotic Sac of a Star - Walkabout the Galaxy\" \/>\n<meta property=\"og:description\" content=\"Most planetary systems discovered so far have relatively little in common with our own. The planets are generally tightly packed around their star making them hot and inhospitable. Most planets are significantly larger than the&#8230;\" \/>\n<meta property=\"og:url\" content=\"https:\/\/sciences.ucf.edu\/physics\/walkaboutthegalaxy\/2015\/10\/the-amniotic-sac-of-a-star\/\" \/>\n<meta property=\"og:site_name\" content=\"Walkabout the Galaxy\" \/>\n<meta property=\"article:published_time\" content=\"2015-10-03T18:51:31+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2022-03-15T14:39:26+00:00\" \/>\n<meta name=\"author\" content=\"Joshua Colwell\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/sciences.ucf.edu\/physics\/walkaboutthegalaxy\/2015\/10\/the-amniotic-sac-of-a-star\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/sciences.ucf.edu\/physics\/walkaboutthegalaxy\/2015\/10\/the-amniotic-sac-of-a-star\/\"},\"author\":{\"name\":\"Joshua Colwell\",\"@id\":\"https:\/\/sciences.ucf.edu\/physics\/walkaboutthegalaxy\/#\/schema\/person\/f014cf7c22d8e4dad2c2b8cdddc16636\"},\"headline\":\"The Amniotic Sac of a Star\",\"datePublished\":\"2015-10-03T18:51:31+00:00\",\"dateModified\":\"2022-03-15T14:39:26+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/sciences.ucf.edu\/physics\/walkaboutthegalaxy\/2015\/10\/the-amniotic-sac-of-a-star\/\"},\"wordCount\":163,\"publisher\":{\"@id\":\"https:\/\/sciences.ucf.edu\/physics\/walkaboutthegalaxy\/#organization\"},\"articleSection\":[\"Episodes\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/sciences.ucf.edu\/physics\/walkaboutthegalaxy\/2015\/10\/the-amniotic-sac-of-a-star\/\",\"url\":\"https:\/\/sciences.ucf.edu\/physics\/walkaboutthegalaxy\/2015\/10\/the-amniotic-sac-of-a-star\/\",\"name\":\"The Amniotic Sac of a Star - Walkabout the Galaxy\",\"isPartOf\":{\"@id\":\"https:\/\/sciences.ucf.edu\/physics\/walkaboutthegalaxy\/#website\"},\"datePublished\":\"2015-10-03T18:51:31+00:00\",\"dateModified\":\"2022-03-15T14:39:26+00:00\",\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/sciences.ucf.edu\/physics\/walkaboutthegalaxy\/2015\/10\/the-amniotic-sac-of-a-star\/\"]}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/sciences.ucf.edu\/physics\/walkaboutthegalaxy\/#website\",\"url\":\"https:\/\/sciences.ucf.edu\/physics\/walkaboutthegalaxy\/\",\"name\":\"Walkabout the Galaxy\",\"description\":\"An irreverent and informative tour of the latest, greatest and most interesting discoveries in astronomy.\",\"publisher\":{\"@id\":\"https:\/\/sciences.ucf.edu\/physics\/walkaboutthegalaxy\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/sciences.ucf.edu\/physics\/walkaboutthegalaxy\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\/\/sciences.ucf.edu\/physics\/walkaboutthegalaxy\/#organization\",\"name\":\"Walk About the Galaxy\",\"url\":\"https:\/\/sciences.ucf.edu\/physics\/walkaboutthegalaxy\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/sciences.ucf.edu\/physics\/walkaboutthegalaxy\/#\/schema\/logo\/image\/\",\"url\":\"https:\/\/sciences.ucf.edu\/physics\/walkaboutthegalaxy\/wp-content\/uploads\/sites\/41\/2020\/11\/wabtWHITE.jpg\",\"contentUrl\":\"https:\/\/sciences.ucf.edu\/physics\/walkaboutthegalaxy\/wp-content\/uploads\/sites\/41\/2020\/11\/wabtWHITE.jpg\",\"width\":900,\"height\":900,\"caption\":\"Walk About the Galaxy\"},\"image\":{\"@id\":\"https:\/\/sciences.ucf.edu\/physics\/walkaboutthegalaxy\/#\/schema\/logo\/image\/\"}},{\"@type\":\"Person\",\"@id\":\"https:\/\/sciences.ucf.edu\/physics\/walkaboutthegalaxy\/#\/schema\/person\/f014cf7c22d8e4dad2c2b8cdddc16636\",\"name\":\"Joshua Colwell\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/secure.gravatar.com\/avatar\/4d0c237585cfb8251280b22826da6b649e44ba573b411700335cdcaff3ac47d4?s=96&d=mm&r=g\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/4d0c237585cfb8251280b22826da6b649e44ba573b411700335cdcaff3ac47d4?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/4d0c237585cfb8251280b22826da6b649e44ba573b411700335cdcaff3ac47d4?s=96&d=mm&r=g\",\"caption\":\"Joshua Colwell\"},\"url\":\"https:\/\/sciences.ucf.edu\/physics\/walkaboutthegalaxy\/author\/jcolwell\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"The Amniotic Sac of a Star - Walkabout the Galaxy","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:\/\/sciences.ucf.edu\/physics\/walkaboutthegalaxy\/2015\/10\/the-amniotic-sac-of-a-star\/","og_locale":"en_US","og_type":"article","og_title":"The Amniotic Sac of a Star - Walkabout the Galaxy","og_description":"Most planetary systems discovered so far have relatively little in common with our own. The planets are generally tightly packed around their star making them hot and inhospitable. Most planets are significantly larger than the&#8230;","og_url":"https:\/\/sciences.ucf.edu\/physics\/walkaboutthegalaxy\/2015\/10\/the-amniotic-sac-of-a-star\/","og_site_name":"Walkabout the Galaxy","article_published_time":"2015-10-03T18:51:31+00:00","article_modified_time":"2022-03-15T14:39:26+00:00","author":"Joshua Colwell","twitter_card":"summary_large_image","schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/sciences.ucf.edu\/physics\/walkaboutthegalaxy\/2015\/10\/the-amniotic-sac-of-a-star\/#article","isPartOf":{"@id":"https:\/\/sciences.ucf.edu\/physics\/walkaboutthegalaxy\/2015\/10\/the-amniotic-sac-of-a-star\/"},"author":{"name":"Joshua Colwell","@id":"https:\/\/sciences.ucf.edu\/physics\/walkaboutthegalaxy\/#\/schema\/person\/f014cf7c22d8e4dad2c2b8cdddc16636"},"headline":"The Amniotic Sac of a Star","datePublished":"2015-10-03T18:51:31+00:00","dateModified":"2022-03-15T14:39:26+00:00","mainEntityOfPage":{"@id":"https:\/\/sciences.ucf.edu\/physics\/walkaboutthegalaxy\/2015\/10\/the-amniotic-sac-of-a-star\/"},"wordCount":163,"publisher":{"@id":"https:\/\/sciences.ucf.edu\/physics\/walkaboutthegalaxy\/#organization"},"articleSection":["Episodes"],"inLanguage":"en-US"},{"@type":"WebPage","@id":"https:\/\/sciences.ucf.edu\/physics\/walkaboutthegalaxy\/2015\/10\/the-amniotic-sac-of-a-star\/","url":"https:\/\/sciences.ucf.edu\/physics\/walkaboutthegalaxy\/2015\/10\/the-amniotic-sac-of-a-star\/","name":"The Amniotic Sac of a Star - Walkabout the Galaxy","isPartOf":{"@id":"https:\/\/sciences.ucf.edu\/physics\/walkaboutthegalaxy\/#website"},"datePublished":"2015-10-03T18:51:31+00:00","dateModified":"2022-03-15T14:39:26+00:00","inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/sciences.ucf.edu\/physics\/walkaboutthegalaxy\/2015\/10\/the-amniotic-sac-of-a-star\/"]}]},{"@type":"WebSite","@id":"https:\/\/sciences.ucf.edu\/physics\/walkaboutthegalaxy\/#website","url":"https:\/\/sciences.ucf.edu\/physics\/walkaboutthegalaxy\/","name":"Walkabout the Galaxy","description":"An irreverent and informative tour of the latest, greatest and most interesting discoveries in astronomy.","publisher":{"@id":"https:\/\/sciences.ucf.edu\/physics\/walkaboutthegalaxy\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/sciences.ucf.edu\/physics\/walkaboutthegalaxy\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/sciences.ucf.edu\/physics\/walkaboutthegalaxy\/#organization","name":"Walk About the Galaxy","url":"https:\/\/sciences.ucf.edu\/physics\/walkaboutthegalaxy\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/sciences.ucf.edu\/physics\/walkaboutthegalaxy\/#\/schema\/logo\/image\/","url":"https:\/\/sciences.ucf.edu\/physics\/walkaboutthegalaxy\/wp-content\/uploads\/sites\/41\/2020\/11\/wabtWHITE.jpg","contentUrl":"https:\/\/sciences.ucf.edu\/physics\/walkaboutthegalaxy\/wp-content\/uploads\/sites\/41\/2020\/11\/wabtWHITE.jpg","width":900,"height":900,"caption":"Walk About the Galaxy"},"image":{"@id":"https:\/\/sciences.ucf.edu\/physics\/walkaboutthegalaxy\/#\/schema\/logo\/image\/"}},{"@type":"Person","@id":"https:\/\/sciences.ucf.edu\/physics\/walkaboutthegalaxy\/#\/schema\/person\/f014cf7c22d8e4dad2c2b8cdddc16636","name":"Joshua Colwell","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/secure.gravatar.com\/avatar\/4d0c237585cfb8251280b22826da6b649e44ba573b411700335cdcaff3ac47d4?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/4d0c237585cfb8251280b22826da6b649e44ba573b411700335cdcaff3ac47d4?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/4d0c237585cfb8251280b22826da6b649e44ba573b411700335cdcaff3ac47d4?s=96&d=mm&r=g","caption":"Joshua Colwell"},"url":"https:\/\/sciences.ucf.edu\/physics\/walkaboutthegalaxy\/author\/jcolwell\/"}]}},"_links":{"self":[{"href":"https:\/\/sciences.ucf.edu\/physics\/walkaboutthegalaxy\/wp-json\/wp\/v2\/posts\/118","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sciences.ucf.edu\/physics\/walkaboutthegalaxy\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sciences.ucf.edu\/physics\/walkaboutthegalaxy\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sciences.ucf.edu\/physics\/walkaboutthegalaxy\/wp-json\/wp\/v2\/users\/28"}],"replies":[{"embeddable":true,"href":"https:\/\/sciences.ucf.edu\/physics\/walkaboutthegalaxy\/wp-json\/wp\/v2\/comments?post=118"}],"version-history":[{"count":1,"href":"https:\/\/sciences.ucf.edu\/physics\/walkaboutthegalaxy\/wp-json\/wp\/v2\/posts\/118\/revisions"}],"predecessor-version":[{"id":119,"href":"https:\/\/sciences.ucf.edu\/physics\/walkaboutthegalaxy\/wp-json\/wp\/v2\/posts\/118\/revisions\/119"}],"wp:attachment":[{"href":"https:\/\/sciences.ucf.edu\/physics\/walkaboutthegalaxy\/wp-json\/wp\/v2\/media?parent=118"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sciences.ucf.edu\/physics\/walkaboutthegalaxy\/wp-json\/wp\/v2\/categories?post=118"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sciences.ucf.edu\/physics\/walkaboutthegalaxy\/wp-json\/wp\/v2\/tags?post=118"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}