{"id":15946,"date":"2025-04-23T08:53:18","date_gmt":"2025-04-23T08:53:18","guid":{"rendered":"https:\/\/exam.pscnotes.com\/current-affairs\/?p=15946"},"modified":"2025-04-23T08:56:00","modified_gmt":"2025-04-23T08:56:00","slug":"bullseye-galaxy","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/current-affairs\/bullseye-galaxy\/","title":{"rendered":"Bullseye Galaxy"},"content":{"rendered":"<ul>\n<li><strong>Discovery:<\/strong> International team discovered the &#8220;Bullseye Galaxy&#8221; (LEDA 1313424), a collisional ring galaxy, using Hubble and Keck observatories.<\/li>\n<li><strong>Unusual Structure:<\/strong> The Bullseye Galaxy has nine rings, a rarity as most ringed galaxies have only two or three. Hubble confirmed eight rings, and Keck Observatory confirmed the ninth.<\/li>\n<li><strong>Formation:<\/strong> Rings formed ~50 million years ago from a head-on collision with a blue dwarf galaxy, triggering gas waves and star formation in ring patterns.<\/li>\n<li><strong>Size &amp; Distance:<\/strong> Located ~534 million light-years away in Pisces, spanning 250,000 light-years (2.5x Milky Way&#8217;s size). A gas trail connects it to the colliding dwarf galaxy, separated by 130,000 light-years.<\/li>\n<li><strong>Future GLSB Galaxy?<\/strong> The Bullseye Galaxy might evolve into a Giant Low Surface Brightness (GLSB) galaxy, relevant for dark matter studies. Its size and hydrogen content indicate candidacy.<\/li>\n<li><strong>GLSB Significance:<\/strong> GLSB galaxies are diffuse, low-density galaxies with large amounts of hydrogen but low star formation, potentially filled with dark matter. They also exhibit a uniform central mass distribution, challenging standard cosmological models.<\/li>\n<li><strong>Evolutionary Link:<\/strong> Scientists have an opportunity to obtain the first direct observational evidence of a collisional ring galaxy turning into a GLSB galaxy<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Discovery: International team discovered the &#8220;Bullseye Galaxy&#8221; (LEDA 1313424), a collisional ring galaxy, using Hubble and Keck observatories. Unusual Structure: The Bullseye Galaxy has nine rings, a rarity as most ringed galaxies have only two or three. Hubble confirmed eight rings, and Keck Observatory confirmed the ninth. Formation: Rings formed ~50 million years ago from &#8230; <a title=\"Bullseye Galaxy\" class=\"read-more\" href=\"https:\/\/exam.pscnotes.com\/current-affairs\/bullseye-galaxy\/\" aria-label=\"Read more about Bullseye Galaxy\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":15959,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[595],"tags":[1283],"class_list":["post-15946","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-current-affairs","tag-22-04-25"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v22.2 (Yoast SEO v23.3) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Bullseye Galaxy - Current Affairs Exam<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/exam.pscnotes.com\/current-affairs\/bullseye-galaxy\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Bullseye Galaxy\" \/>\n<meta property=\"og:description\" content=\"Discovery: International team discovered the &#8220;Bullseye Galaxy&#8221; (LEDA 1313424), a collisional ring galaxy, using Hubble and Keck observatories. Unusual Structure: The Bullseye Galaxy has nine rings, a rarity as most ringed galaxies have only two or three. Hubble confirmed eight rings, and Keck Observatory confirmed the ninth. Formation: Rings formed ~50 million years ago from ... 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Unusual Structure: The Bullseye Galaxy has nine rings, a rarity as most ringed galaxies have only two or three. Hubble confirmed eight rings, and Keck Observatory confirmed the ninth. Formation: Rings formed ~50 million years ago from ... 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