{"id":61529,"date":"2025-09-01T15:03:14","date_gmt":"2025-09-01T09:33:14","guid":{"rendered":"https:\/\/vajiramandravi.com\/current-affairs\/?p=61529"},"modified":"2025-09-01T15:05:33","modified_gmt":"2025-09-01T09:35:33","slug":"mira-stars","status":"publish","type":"post","link":"https:\/\/vajiramandravi.com\/current-affairs\/mira-stars\/","title":{"rendered":"Mira Stars"},"content":{"rendered":"<h2><b>Mira Stars Latest News<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">Recently, the most precise determination of the expansion rate of the universe was made using cool, giant variable stars \u2018Mira\u2019 by the scientists from Inter-University Centre for Astronomy and Astrophysics (IUCAA).<\/span><\/p>\n<h2><b>About Mira Stars<\/b><\/h2>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Mira, also known as <\/span><b>Omicron Ceti,<\/b><span style=\"font-weight: 400;\"> is a star that remarkably <\/span><b>changes its brightness over time, in a regular pattern.<\/b><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">The name<\/span><b>, Mira, means &#8220;the wonderful&#8221; in Latin<\/b><span style=\"font-weight: 400;\">, and it lived up to that name by becoming the prototype for an entire <\/span><b>class of stars known as Mira variables.<\/b><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">With the variability first measured by astronomers in <\/span><b>the 17th century<\/b><span style=\"font-weight: 400;\">, Mira was the first known example of a &#8220;variable star&#8221;\u2014a star that doesn&#8217;t shine with a constant brightness.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Mira variables are a type of giant star that go through <\/span><b>regular cycles of expanding and contracting.<\/b><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">These cycles cause their brightness to vary in a predictable way, typically over periods ranging <\/span><b>from 100 to 1,000 days.<\/b><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">These stars are relatively cool, with <\/span><b>surface temperatures around 3,000 Kelvin<\/b><span style=\"font-weight: 400;\"> (about half the temperature of the Sun\u2019s surface), and they are in the late stages of their life.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">One of the most important things about Mira variables is that there is a strong relationship between how bright they are and how long their pulsation cycles last.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">This relationship allows astronomers to use them as &#8220;<\/span><b>standard candles.&#8221;<\/b><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">A standard candle is an object in <\/span><b>space whose true brightness<\/b><span style=\"font-weight: 400;\"> is known. By comparing how bright the object appears from Earth to how bright it actually is, scientists can calculate how far away it is.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">This is a key method used to measure distances in the universe, forming part of what astronomers <\/span><b>call the &#8220;extragalactic distance ladder.&#8221;<\/b><\/li>\n<\/ul>\n<p><b>Source:<\/b><a href=\"https:\/\/www.pib.gov.in\/PressReleseDetailm.aspx?PRID=2162475\" target=\"_blank\" rel=\"nofollow noopener\"> <span style=\"font-weight: 400;\">PIB<\/span><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Mira Stars, also known as Omicron Ceti, is a star that remarkably changes its brightness over time, in a regular pattern. Read more about Mira Stars, Meaning, Features, Latest News<\/p>\n","protected":false},"author":24,"featured_media":61556,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[2446],"class_list":{"0":"post-61529","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-upsc-prelims-current-affairs","8":"tag-mira-stars","9":"no-featured-image-padding"},"acf":[],"_links":{"self":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/61529","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/users\/24"}],"replies":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/comments?post=61529"}],"version-history":[{"count":0,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/61529\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media\/61556"}],"wp:attachment":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media?parent=61529"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/categories?post=61529"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/tags?post=61529"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}