{"id":26513,"date":"2024-09-11T04:51:22","date_gmt":"2024-09-10T23:21:22","guid":{"rendered":"https:\/\/vajiramandravi.com\/current-affairs\/?p=26513"},"modified":"2025-04-08T02:41:52","modified_gmt":"2025-04-07T21:11:52","slug":"what-is-a-nebula","status":"publish","type":"post","link":"https:\/\/vajiramandravi.com\/current-affairs\/what-is-a-nebula\/","title":{"rendered":"What is a Nebula?"},"content":{"rendered":"<h2><strong>About Nebula:<\/strong><\/h2>\n<ul>\n<li>A nebula is a <strong>giant cloud of dust and gas<\/strong> in space.<\/li>\n<li><strong>Some nebulae<\/strong> (more than one nebula) <strong>come from<\/strong> the gas and dust thrown out by the <strong>explosion of a dying star<\/strong>, such as a <strong>supernova<\/strong>.<\/li>\n<li><strong>Other nebulae<\/strong> are <strong>regions where new stars are beginning to form.<\/strong> For this reason, some nebulae are called &#8220;<strong>star nurseries.&#8221;<\/strong><\/li>\n<li><strong>How do stars form in a nebula?<\/strong>\n<ul>\n<li>Nebulae are made of dust and gases\u2014mostly hydrogen and helium.<\/li>\n<li>The dust and gases in a nebula are very spread out, but <strong>gravity<\/strong> can slowly begin to <strong>pull together clumps of dust and gas<\/strong>.<\/li>\n<li>As these <strong>clumps get bigger<\/strong> and bigger, their <strong>gravity gets stronger<\/strong> and stronger.<\/li>\n<li><strong>Eventually<\/strong>, the <strong>clump of dust and gas<\/strong> gets so big that it <strong>collapses from its own gravity.\u00a0<\/strong><\/li>\n<li>The collapse causes the <strong>material at the center<\/strong> of the cloud to <strong>heat up-and<\/strong> this <strong>hot core<\/strong> is the <strong>beginning of a star.<\/strong><\/li>\n<\/ul>\n<\/li>\n<li><strong>Nebulae existin<\/strong> the space between the stars\u2014also known as <strong>interstellar space.<\/strong><\/li>\n<li>The <strong>closest known<\/strong> nebula to Earth is called the <strong>Helix Nebula.<\/strong> It is approximately 700 light-years away from Earth.<\/li>\n<li>Nebulas come in <strong>many shapes and sizes<\/strong> and can be further <strong>divided into<\/strong> several subcategories, including <strong>planetary nebulas, supernova remnants, dark nebulas,<\/strong> and <strong>emission nebulas.\u00a0<\/strong><\/li>\n<\/ul>\n<p><strong>Red Spider Nebula:<\/strong><\/p>\n<ul>\n<li>It is a <strong>planetary nebula<\/strong> located 3,<strong>000 light-years from Earth<\/strong> and can be found in the <strong>constellation of Sagittarius<\/strong>.\u00a0<\/li>\n<li>It <strong>harbours<\/strong> one of the <strong>hottest stars known<\/strong>, which heats the gas around it to form shockwaves 62 billion miles (100 billion km) high.\u00a0<\/li>\n<\/ul>\n<hr \/>\n<h3><strong>Q1<\/strong>: What is a Supernova?<\/h3>\n<p>A supernova is the name given to the cataclysmic explosion of a massive star. They are the largest explosion that takes place in space. It can emit more energy in a few seconds than our sun will radiate in its lifetime of billions of years. They&#8217;re also the primary source of heavy elements in the universe. On average, a supernova will occur once every 50 years in a galaxy the size of the Milky Way.<\/p>\n<p><strong>Source: <\/strong><a href=\"https:\/\/www.republicworld.com\/science\/space\/cosmic-spider-nasa-s-hubble-captures-stunning-image-of-the-red-spider-nebula-s-celestial-beauty\" target=\"_blank\" rel=\"nofollow noopener\">Cosmic Spider: Nasa&#8217;s Hubble Captures Stunning Image Of The Red Spider Nebula&#8217;s Celestial Beauty<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>A nebula is a giant cloud of dust and gas in space.<\/p>\n","protected":false},"author":5,"featured_media":26514,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":{"0":"post-26513","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\/26513","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=26513"}],"version-history":[{"count":0,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/26513\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media\/26514"}],"wp:attachment":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media?parent=26513"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/categories?post=26513"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/tags?post=26513"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}