{"id":17372,"date":"2023-11-25T04:02:04","date_gmt":"2023-11-24T22:32:04","guid":{"rendered":"https:\/\/vajiramandravi.com\/current-affairs\/?p=17372"},"modified":"2025-04-05T03:53:27","modified_gmt":"2025-04-04T22:23:27","slug":"radio-galaxy","status":"publish","type":"post","link":"https:\/\/vajiramandravi.com\/current-affairs\/radio-galaxy\/","title":{"rendered":"What is a Radio Galaxy?"},"content":{"rendered":"<h2>About Radio Galaxy<\/h2>\n<ul>\n<li>Radio Galaxies, also known as\u00a0radio-luminous galaxies or\u00a0radio-loud galaxies, are a particular\u00a0type of active galaxy that emits more light at radio wavelengths than at visible wavelengths.<\/li>\n<li>These\u00a0happen through the\u00a0interaction between charged particles and strong magnetic fields related to supermassive black holes at the galaxies\u2019 center.<\/li>\n<li>Radio galaxies are\u00a0driven by non-thermal emissions.<\/li>\n<li>They are\u00a0much bigger than\u00a0most of the\u00a0other galaxies in the universe.\u00a0<\/li>\n<li>The\u00a0first radio galaxy to be\u00a0discovered,\u00a0and\u00a0still the brightest,\u00a0is called\u00a0Cygnus A.<\/li>\n<li>There are\u00a0two broad classes\u00a0of radio galaxies:\n<ul>\n<li>Core-halo radio galaxies:<\/li>\n<\/ul>\n<\/li>\n<li>They\u00a0exhibit radio emission\u00a0from a region concentrated\u00a0around the nucleus of the\u00a0galaxy.<\/li>\n<li>The region of radio emission\u00a0is comparable in size to the optically visible galaxy.\n<ul>\n<li>Lobed radio galaxies:<\/li>\n<\/ul>\n<\/li>\n<li>They\u00a0display great lobes of radio emission extending, in some cases, for millions of light years\u00a0beyond the optical part of the galaxy.<\/li>\n<li>Some\u00a0radio galaxies\u00a0have a single lobe, but more often, the lobes are double, arrayed on both sides of the optical galaxy.<\/li>\n<\/ul>\n<hr \/>\n<h3>Q1) What are Galaxies?<\/h3>\n<p>Galaxies are groups of stars and other space objects held together by gravity.Galaxies take on many different shapes and forms throughout the cosmos.There are more than 100 billion galaxies in the universe.<\/p>\n<p><strong>Source:<\/strong> <a href=\"https:\/\/phys.org\/news\/2023-11-discovery-dozens-giant-radio-galaxies.html#google_vignette\" target=\"_blank\" rel=\"nofollow noopener\"><u>FIRST discovery of dozens of new giant radio galaxies<\/u><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Radio Galaxies are a particular type of active galaxy that emits more light at radio wavelengths than at visible wavelengths.<\/p>\n","protected":false},"author":5,"featured_media":17373,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":{"0":"post-17372","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\/17372","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=17372"}],"version-history":[{"count":0,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/17372\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media\/17373"}],"wp:attachment":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media?parent=17372"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/categories?post=17372"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/tags?post=17372"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}