{"id":45970,"date":"2025-04-22T12:37:57","date_gmt":"2025-04-22T07:07:57","guid":{"rendered":"https:\/\/vajiramandravi.com\/current-affairs\/?p=45970"},"modified":"2025-05-13T12:52:27","modified_gmt":"2025-05-13T07:22:27","slug":"bullseye-galaxy","status":"publish","type":"post","link":"https:\/\/vajiramandravi.com\/current-affairs\/bullseye-galaxy\/","title":{"rendered":"Bullseye Galaxy"},"content":{"rendered":"<h2>Bullseye Galaxy Latest News<\/h2>\n<p>The Bullseye Galaxy (LEDA 1313424) was recently discovered by an international team of researchers using the Hubble Space Telescope and W.M. Keck Observatory.<\/p>\n<h2>About Bullseye Galaxy<\/h2>\n<ul>\n<li>The Bullseye Galaxy (LEDA 1313424) is a\u00a0<strong>collisional ring galaxy (CRG)\u00a0<\/strong>located approximately\u00a0<strong>534 million light-years<\/strong>\u00a0away in the constellation Pisces..\n<ul>\n<li>The galaxy&#8217;s\u00a0<strong>distinct ringed structure<\/strong>\u00a0is believed to have formed approximately\u00a0<strong>50 million years ago<\/strong>\u00a0due to a\u00a0<strong>head-on collision<\/strong>\u00a0with a\u00a0<strong>blue dwarf galaxy<\/strong>.<\/li>\n<li>This\u00a0<strong>head-on collision<\/strong>\u00a0is believed to have caused\u00a0<strong>rippling gas waves<\/strong>, leading to\u00a0<strong>star formation<\/strong>\u00a0in ring-like patterns.<\/li>\n<li>This discovery was termed \u201c<strong>serendipitous<\/strong>\u201d as ringed galaxies usually have only two or three rings.<\/li>\n<\/ul>\n<\/li>\n<li><strong>Observed Through Multiple Telescopes<\/strong>:\n<ul>\n<li>The\u00a0<strong>Hubble Space Telescope<\/strong>\u00a0confirmed\u00a0<strong>eight rings<\/strong>.<\/li>\n<li>The\u00a0<strong>W.M. Keck Observatory<\/strong>\u00a0in Hawaii confirmed a\u00a0<strong>ninth ring<\/strong>, revealing the full structure.<\/li>\n<\/ul>\n<\/li>\n<li>The Bullseye Galaxy spans\u00a0<strong>250,000 light-years<\/strong>\u00a0in diameter \u2014 nearly\u00a0<strong>2.5 times larger<\/strong>\u00a0than the Milky Way. Despite a current separation of\u00a0<strong>130,000 light-years<\/strong>, a\u00a0<strong>thin trail of gas<\/strong>\u00a0still connects it to the colliding dwarf galaxy.<\/li>\n<li>The Bullseye may evolve into a\u00a0<strong>Giant Low Surface Brightness (GLSB) Galaxy<\/strong>, a\u00a0<strong>rare, massive galaxy type<\/strong>\u00a0believed to hold\u00a0<strong>clues about dark matter<\/strong>.<\/li>\n<li><strong>Giant Low Surface Brightness (GLSB) Galaxy features:\u00a0<\/strong>\n<ul>\n<li>Composed of\u00a0<strong>diffuse, low-density stellar disks<\/strong>.<\/li>\n<li>Contain\u00a0<strong>large amounts of neutral hydrogen<\/strong>\u00a0but exhibit\u00a0<strong>low star formation rates<\/strong>.<\/li>\n<li>Include examples like\u00a0<strong>Malin 1<\/strong>, which is\u00a0<strong>6.5 times wider<\/strong>\u00a0than the Milky Way.<\/li>\n<\/ul>\n<\/li>\n<li><strong>GLSB galaxies<\/strong>\u00a0are believed to be\u00a0<strong>rich in dark matter<\/strong>, and their\u00a0<strong>unusual mass distribution<\/strong>\u00a0challenges the\u00a0<strong>Standard Model of Cosmology<\/strong>.<\/li>\n<li>These galaxies display a\u00a0<strong>uniform central mass<\/strong>\u00a0instead of a dense core, suggesting discrepancies in current models.<\/li>\n<\/ul>\n<p><strong>Source:\u00a0<\/strong><a href=\"https:\/\/www.thehindu.com\/sci-tech\/science\/bullseye-galaxy-with-nine-rings-may-also-reveal-dark-matter-secrets\/article69452237.ece#:~:text=For%20other%20astronomers%2C%20however%2C%20the,in%20The%20Astrophysical%20Journal%20Letters\" target=\"_blank\" rel=\"nofollow noopener\">TH<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>The Bullseye Galaxy (LEDA 1313424) is a collisional ring galaxy (CRG) located approximately 534 million light-years away in Pisces&#8217;s constellation.<\/p>\n","protected":false},"author":11,"featured_media":45971,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[226,21,23],"class_list":{"0":"post-45970","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-upsc-prelims-current-affairs","8":"tag-bullseye-galaxy","9":"tag-prelims-pointers","10":"tag-upsc-prelims-current-affairs","11":"no-featured-image-padding"},"acf":[],"_links":{"self":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/45970","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\/11"}],"replies":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/comments?post=45970"}],"version-history":[{"count":0,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/45970\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media\/45971"}],"wp:attachment":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media?parent=45970"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/categories?post=45970"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/tags?post=45970"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}