{"id":21725,"date":"2018-09-23T04:56:55","date_gmt":"2018-09-23T04:56:55","guid":{"rendered":"http:\/\/finn-family.com\/?p=21725"},"modified":"2018-09-23T04:56:55","modified_gmt":"2018-09-23T04:56:55","slug":"equinox-analemma-over-the-callanish-stones","status":"publish","type":"post","link":"http:\/\/finn-family.com\/?p=21725","title":{"rendered":"Equinox: Analemma over the Callanish Stones"},"content":{"rendered":"<div><img src='https:\/\/apod.nasa.gov\/image\/1809\/CallanishAnalemma_Petricca_960.jpg' style='max-width:600px;' \/><\/p>\n<div>Does the Sun return to the same spot on the sky every day at the same time? No. A more visual answer to that question is an analemma, a composite image taken from the same spot at the same time over the course of a year. The featured analemma was composed from images taken every few days at 4 pm near the village of Callanish in the Outer Hebrides in Scotland, UK. In the foreground are the Callanish Stones, a stone circle built around 2700 BC during humanity&#8217;s Bronze Age. It is not known if the placement of the Callanish Stones has or had astronomical significance. The ultimate causes for the figure-8 shape of this an all analemmas are the tilt of the Earth axis and the ellipticity of the Earth&#8217;s orbit around the Sun. At the solstices, the Sun will appear at the top or bottom of an analemma. Equinoxes, however, correspond to analemma middle points &#8212; not the intersection point. Today at 1:54 am (UT) is the equinox (&#8220;equal night&#8221;), when day and night are equal over all of planet Earth. Many cultures celebrate a change of season at an equinox. via NASA <a href=\"https:\/\/apod.nasa.gov\/apod\/ap180923.html\"><\/a><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Does the Sun return to the same spot on the sky every day at the same time? No. A more visual answer to that question is an analemma, a composite <a href=\"http:\/\/finn-family.com\/?p=21725\" class=\"more-link\">[&hellip;]<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"Layout":"","footnotes":"","_links_to":"","_links_to_target":""},"categories":[9],"tags":[10,12],"class_list":["entry","author-admin","post-21725","post","type-post","status-publish","format-standard","category-whatsup","tag-ifttt","tag-nasa"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"http:\/\/finn-family.com\/index.php?rest_route=\/wp\/v2\/posts\/21725","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/finn-family.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/finn-family.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/finn-family.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/finn-family.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=21725"}],"version-history":[{"count":1,"href":"http:\/\/finn-family.com\/index.php?rest_route=\/wp\/v2\/posts\/21725\/revisions"}],"predecessor-version":[{"id":21726,"href":"http:\/\/finn-family.com\/index.php?rest_route=\/wp\/v2\/posts\/21725\/revisions\/21726"}],"wp:attachment":[{"href":"http:\/\/finn-family.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=21725"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/finn-family.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=21725"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/finn-family.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=21725"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}