{"id":16090,"date":"2023-10-20T09:22:52","date_gmt":"2023-10-20T03:52:52","guid":{"rendered":"https:\/\/vajiramandravi.com\/current-affairs\/?p=16090"},"modified":"2025-04-03T22:18:18","modified_gmt":"2025-04-03T16:48:18","slug":"sga","status":"publish","type":"post","link":"https:\/\/vajiramandravi.com\/current-affairs\/sga\/","title":{"rendered":"Siena Galaxy Atlas (SGA)"},"content":{"rendered":"<h2>About Siena Galaxy Atlas<\/h2>\n<ul>\n<li>It is a\u00a0digital atlas that was created to get\u00a0to know our universe better through several of the known galaxies.<\/li>\n<li>It was created using data from three astronomical surveys collected between 2014 and 2017 at\u00a0Cerro Tololo Inter-American Observatory (CTIO) and\u00a0Kitt Peak National Observatory (KPNO). Together these surveys are known as the DESI Legacy Surveys.<\/li>\n<li>How is it different from other atlases?\n<ul>\n<li>It is\u00a0dependent on state-of-the-art digital images captured by advanced technology, unlike previous atlases which relied on antiquated equipment and photographic plates.\u00a0<\/li>\n<li>As it is built on the images captured with highly sensitive instruments, it boasts of having the most accurate data.<\/li>\n<li>It is also the\u00a0first cosmic atlas to feature the light profiles of galaxies\u200a- a curve that describes how the brightness of the galaxy changes from its brightest point to its dimmest.\u00a0<\/li>\n<\/ul>\n<\/li>\n<li>Significance\n<ul>\n<li>Cosmic atlases help astronomers\u00a0spot patterns that help categorise new discoveries, such as stars that suddenly flare and then disappear (thus called \u2018transients\u2019).<\/li>\n<li>These atlases also allow astronomers to identify which objects are contenders for detailed follow-up studies.\u00a0<\/li>\n<li>It helps in\u00a0investigate everything\u00a0from the births and evolutions of galaxies to the distribution of dark matter and propagation of gravitational waves through space.\u00a0<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<hr \/>\n<h3>Q1) What is the Milky Way?<\/h3>\n<p>The Milky Way is the galaxy in which our solar system is located. It is a barred spiral galaxy, which means it has a central bar-shaped region made up of stars, surrounded by spiral arms that contain stars, gas, dust, and other celestial objects.<\/p>\n<p><strong>Source: <\/strong><a href=\"https:\/\/www.wionews.com\/science\/astronomers-unveiled-galactic-atlas-of-detailed-400000-galaxies-near-milky-way-648677\" target=\"_blank\" rel=\"nofollow noopener\">See 400,000 galaxies near Milky Way in this amazing &#8216;galactic atlas&#8217;<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Siena Galaxy Atlas (SGA) is a digital atlas that was created to get to know our universe better through several of the known galaxies.<\/p>\n","protected":false},"author":5,"featured_media":16091,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":{"0":"post-16090","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-upsc-prelims-current-affairs","8":"no-featured-image-padding"},"acf":[],"_links":{"self":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/16090","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\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/comments?post=16090"}],"version-history":[{"count":0,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/16090\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media\/16091"}],"wp:attachment":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media?parent=16090"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/categories?post=16090"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/tags?post=16090"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}