{"id":11352,"date":"2012-06-10T08:00:45","date_gmt":"2012-06-10T15:00:45","guid":{"rendered":"http:\/\/www.todayifoundout.com\/?p=11352"},"modified":"2012-06-01T17:40:13","modified_gmt":"2012-06-02T00:40:13","slug":"sirius-a-is-the-brightest-extrasolar-star-visible-to-the-naked-eye-from-earth","status":"publish","type":"post","link":"http:\/\/www.todayifoundout.com\/index.php\/2012\/06\/sirius-a-is-the-brightest-extrasolar-star-visible-to-the-naked-eye-from-earth\/","title":{"rendered":"Sirius-A is the Brightest Extrasolar Star Visible to the Naked Eye from Earth"},"content":{"rendered":"<div class=\"pf-content\"><p><a href=\"http:\/\/www.todayifoundout.com\/wp-content\/uploads\/2012\/06\/sirius-facts.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-11353\" title=\"sirius facts\" src=\"http:\/\/www.todayifoundout.com\/wp-content\/uploads\/2012\/06\/sirius-facts.jpg\" alt=\"\" width=\"559\" height=\"800\" srcset=\"http:\/\/www.todayifoundout.com\/wp-content\/uploads\/2012\/06\/sirius-facts.jpg 559w, http:\/\/www.todayifoundout.com\/wp-content\/uploads\/2012\/06\/sirius-facts-340x487.jpg 340w\" sizes=\"auto, (max-width: 559px) 100vw, 559px\" \/><\/a><\/p>\n<p>Sirius-A is the brightest extrasolar star visible to the naked eye from Earth, being almost twice as bright as the second brightest, Canopus.\u00a0 Sirius-A and Sirius-B combine to form a binary system and appear as one star to the naked eye, though the vast majority of luminosity to the naked eye comes from Sirius-A, Sirius-B being a white dwarf which is only around 30 AU (astronomical units) away from Sirius-A.\u00a0 It is also theorized that there is a Sirius-C, but to date, this has not been proven.\u00a0 Sirius A and B (and possibly C) combine to form a bright point known as Sirius or the &#8220;Dog Star&#8221;. *looks at J.K. Rowling*<\/p>\n<p>Sirius-A is a white main sequence star (A1V) that is about twice the size of our Sun. The extreme brightness from our point of view comes not so much because it is a particularly bright star, but rather because it is only 8.6 light years away (2.6 parsecs).\u00a0 That&#8217;s a really long ways away by standards of distance we normally deal with, but by galactic standards, it&#8217;s just next door and is one of our nearest neighbors.<\/p>\n<p><a title=\"Why the Hottest Part of the Summer is Called the Dog Days\" href=\"http:\/\/www.todayifoundout.com\/index.php\/2010\/10\/why-the-hottest-part-of-the-summer-is-called-the-dog-days\/\" target=\"_blank\">Reference<\/a><\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Sirius-A is the brightest extrasolar star visible to the naked eye from Earth, being almost twice as bright as the second brightest, Canopus.\u00a0 Sirius-A and Sirius-B combine to form a binary system and appear as one star to the naked eye, though the vast majority of luminosity to the naked eye comes from Sirius-A, Sirius-B being a white dwarf which [&#8230;]<\/p>\n","protected":false},"author":2,"featured_media":11353,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[689],"tags":[1144,2701,267,932,1112,726],"class_list":["post-11352","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-quick-facts","tag-astronomy-facts","tag-brightest-star-in-the-sky","tag-facts","tag-physics-facts","tag-quick-facts-2","tag-science-facts"],"_links":{"self":[{"href":"http:\/\/www.todayifoundout.com\/index.php\/wp-json\/wp\/v2\/posts\/11352","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.todayifoundout.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.todayifoundout.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.todayifoundout.com\/index.php\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"http:\/\/www.todayifoundout.com\/index.php\/wp-json\/wp\/v2\/comments?post=11352"}],"version-history":[{"count":1,"href":"http:\/\/www.todayifoundout.com\/index.php\/wp-json\/wp\/v2\/posts\/11352\/revisions"}],"predecessor-version":[{"id":11354,"href":"http:\/\/www.todayifoundout.com\/index.php\/wp-json\/wp\/v2\/posts\/11352\/revisions\/11354"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/www.todayifoundout.com\/index.php\/wp-json\/wp\/v2\/media\/11353"}],"wp:attachment":[{"href":"http:\/\/www.todayifoundout.com\/index.php\/wp-json\/wp\/v2\/media?parent=11352"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.todayifoundout.com\/index.php\/wp-json\/wp\/v2\/categories?post=11352"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.todayifoundout.com\/index.php\/wp-json\/wp\/v2\/tags?post=11352"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}