{"id":21759,"date":"2026-01-14T11:36:30","date_gmt":"2026-01-14T06:06:30","guid":{"rendered":"https:\/\/vajiramandravi.com\/current-affairs\/?p=21759"},"modified":"2026-01-14T15:59:45","modified_gmt":"2026-01-14T10:29:45","slug":"white-dwarf","status":"publish","type":"post","link":"https:\/\/vajiramandravi.com\/current-affairs\/white-dwarf\/","title":{"rendered":"White Dwarf"},"content":{"rendered":"<h2><b>White Dwarf Latest News<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">Recently, astronomers have observed a white dwarf that is creating a colorful shockwave as it moves through space.<\/span><\/p>\n<h2><b>About White Dwarf<\/b><\/h2>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">It is <\/span><b>the stellar core<\/b><span style=\"font-weight: 400;\"> left behind after a dying star has <\/span><b>exhausted its nuclear fuel<\/b><span style=\"font-weight: 400;\"> and expelled its outer layers to form a planetary nebula.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">It is what stars like the Sun become after they have exhausted their nuclear fuel.<\/span><\/li>\n<\/ul>\n<h2><b>Characteristics of White dwarfs\u00a0<\/b><\/h2>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">It <\/span><b>no longer supports nuclear fusion<\/b><span style=\"font-weight: 400;\"> reactions that generate energy, but they are still extremely hot.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Size: <\/b><span style=\"font-weight: 400;\">A typical white dwarf is <\/span><b>half as massive as the Sun<\/b><span style=\"font-weight: 400;\">, yet only slightly bigger than Earth.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">This makes white dwarfs one of the densest collections of matter, surpassed only by neutron stars.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Composition:<\/b><span style=\"font-weight: 400;\"> A <\/span><b>newly born white dwarf consists<\/b><span style=\"font-weight: 400;\"> of <\/span><b>helium, carbon, and oxygen nuclei<\/b><span style=\"font-weight: 400;\">, swimming in a sea of highly energetic electrons.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Unlike most other stars that are supported against their own gravitation by normal gas pressure, white dwarf stars are supported by the <\/span><b>degeneracy pressure of the electron gas in their interior.<\/b><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Degeneracy pressure<\/b><span style=\"font-weight: 400;\"> is the increased resistance exerted by electrons composing the gas, as a result of stellar contraction.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Unless it is accreting matter from a nearby star, the white dwarf cools down over the next billion years or so.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">It is predicted that they would <\/span><b>ultimately form \u2018black dwarfs\u2019,<\/b><span style=\"font-weight: 400;\"> although the Universe is likely not old enough for any black dwarfs to exist yet.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">The luminosity of white dwarfs can therefore be used by astronomers to measure how long-ago star formation began in a particular region.<\/span><\/li>\n<\/ul>\n<p><b>Source:<\/b> <strong><a href=\"https:\/\/ddnews.gov.in\/en\/astronomers-spot-white-dwarf-star-creating-a-colorful-shockwave\/\" target=\"_blank\" rel=\"nofollow noopener\">DD News<\/a><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>White Dwarf is the stellar core left behind after a dying star has exhausted its nuclear fuel and expelled its outer layers to form a planetary nebula. Read more about White Dwarf, Meaning, Characteristics, Size, Latest News.<\/p>\n","protected":false},"author":5,"featured_media":82512,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[21,22,23,4728],"class_list":{"0":"post-21759","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-upsc-prelims-current-affairs","8":"tag-prelims-pointers","9":"tag-upsc-current-affairs","10":"tag-upsc-prelims-current-affairs","11":"tag-white-dwarf","12":"no-featured-image-padding"},"acf":[],"_links":{"self":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/21759","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=21759"}],"version-history":[{"count":0,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/21759\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media\/82512"}],"wp:attachment":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media?parent=21759"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/categories?post=21759"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/tags?post=21759"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}