{"id":13500,"date":"2023-07-28T10:01:56","date_gmt":"2023-07-28T04:31:56","guid":{"rendered":"https:\/\/vajiramandravi.com\/current-affairs\/?p=13500"},"modified":"2025-04-02T04:53:10","modified_gmt":"2025-04-01T23:23:10","slug":"markarian-421","status":"publish","type":"post","link":"https:\/\/vajiramandravi.com\/current-affairs\/markarian-421\/","title":{"rendered":"Markarian 421"},"content":{"rendered":"<h2><strong>About Markarian 421:\u00a0<\/strong><\/h2>\n<p>&nbsp;<\/p>\n<ul>\n<li>It is a <strong>supermassive black hole<\/strong> firing a jet of high-energy particles aimed directly at Earth.<\/li>\n<li>It is\u00a0 about 400 million light-years away from the earth<\/li>\n<li>It is located in the <strong>constellation Ursa Major.<\/strong><\/li>\n<li><strong>Characteristics of supermassive black hole<\/strong>\n<ul>\n<li>They have a mass greater than about <strong>50,000 times the mass of our sun.<\/strong><\/li>\n<li>These black holes are far too large to have formed from the gravitational collapse of a single star.<\/li>\n<li>These are <strong>always found at the center of a galaxy <\/strong>and almost all galaxies have a supermassive black hole at its center.\u00a0<\/li>\n<\/ul>\n<\/li>\n<li><strong>Key facts about the Imaging X-ray Polarimetry Explorer (IXPE)<\/strong>\n<ul>\n<li>It is an international collaboration <strong>between NASA and the Italian Space Agency.<\/strong><\/li>\n<li>It studies the <strong>most extreme and mysterious objects in the universe<\/strong> \u2013 supernova remnants, supermassive black holes, and dozens of other high-energy objects.<\/li>\n<li>It is the first satellite dedicated to measuring <strong>polarized X-rays from objects<\/strong>, such as neutron stars and supermassive black holes, to reveal previously hidden details of the universe.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<hr \/>\n<h3>Q) What is black hole?<\/h3>\n<p>A black hole is a region in space where the gravitational pull is so strong that nothing, not even light, can escape from it once it crosses a certain boundary called the event horizon. As a result, black holes are invisible to the naked eye and can only be detected indirectly by their effect on nearby matter and radiation.<\/p>\n<p><strong>Source:<\/strong>\u00a0<a href=\"https:\/\/indianexpress.com\/article\/technology\/science\/supermassive-black-hole-jet-fired-earth-8861590\/\" target=\"_blank\" rel=\"nofollow noopener\">A supermassive black hole is firing high-energy particle jet towards Earth<\/a><\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Markarian 421 is a supermassive black hole firing a jet of high-energy particles aimed directly at Earth.<\/p>\n","protected":false},"author":5,"featured_media":13501,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":{"0":"post-13500","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\/13500","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=13500"}],"version-history":[{"count":0,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/13500\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media\/13501"}],"wp:attachment":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media?parent=13500"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/categories?post=13500"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/tags?post=13500"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}