{"id":56889,"date":"2025-07-26T15:02:32","date_gmt":"2025-07-26T09:32:32","guid":{"rendered":"https:\/\/vajiramandravi.com\/current-affairs\/?p=56889"},"modified":"2025-07-26T15:34:07","modified_gmt":"2025-07-26T10:04:07","slug":"comet","status":"publish","type":"post","link":"https:\/\/vajiramandravi.com\/current-affairs\/comet\/","title":{"rendered":"Comet"},"content":{"rendered":"<h2><b>Comet Latest News<\/b><\/h2>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">NASA\u2019s Hubble Space Telescope has captured the first detailed images of interstellar comet 3I\/ATLAS as it passes through our solar system, offering scientists a rare glimpse at a visitor from another star system.<\/span><\/p>\n<h2><b>About Comet<\/b><\/h2>\n<ul>\n<li style=\"font-weight: 400; text-align: justify;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Comets are <\/span><b>large objects made of dust and ice <\/b><span style=\"font-weight: 400;\">that <\/span><b>orbit the Sun.\u00a0<\/b><\/li>\n<li style=\"font-weight: 400; text-align: justify;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Best known for their l<\/span><b>ong, streaming tails, <\/b><span style=\"font-weight: 400;\">these ancient objects are <\/span><b>leftovers from the formation of the solar system <\/b><span style=\"font-weight: 400;\">4.6 billion years ago.<\/span><\/li>\n<li style=\"font-weight: 400; text-align: justify;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Comets are <\/span><b>mostly found way out in the solar system.\u00a0<\/b><\/li>\n<li style=\"font-weight: 400; text-align: justify;\" aria-level=\"1\"><b>Some exist i<\/b><span style=\"font-weight: 400;\">n a <\/span><b>wide disk beyond <\/b><span style=\"font-weight: 400;\">the orbit of <\/span><b>Neptune called the Kuiper Belt.\u00a0<\/b>\n<ul>\n<li style=\"font-weight: 400; text-align: justify;\" aria-level=\"1\"><span style=\"font-weight: 400;\">We call these <\/span><b>short-period comets.<\/b><span style=\"font-weight: 400;\"> They take less than 200 years to orbit the Sun.<\/span><\/li>\n<\/ul>\n<\/li>\n<li style=\"font-weight: 400; text-align: justify;\" aria-level=\"1\"><b>Other comets<\/b><span style=\"font-weight: 400;\"> live <\/span><b>in the Oort Clou<\/b><span style=\"font-weight: 400;\">d, the<\/span><b> sphere-shaped, outer edge of the solar system <\/b><span style=\"font-weight: 400;\">that is about 50 times farther away from the Sun than the Kuiper Belt.\u00a0<\/span>\n<ul>\n<li style=\"font-weight: 400; text-align: justify;\" aria-level=\"1\"><span style=\"font-weight: 400;\">These are called <\/span><b>long-period comets<\/b><span style=\"font-weight: 400;\"> because they take much longer to orbit the Sun.\u00a0<\/span><\/li>\n<\/ul>\n<\/li>\n<li style=\"font-weight: 400; text-align: justify;\" aria-level=\"1\"><span style=\"font-weight: 400;\">The comet with the longest known orbit takes more than 250,000 years to make just one trip around the Sun.<\/span><\/li>\n<li style=\"font-weight: 400; text-align: justify;\" aria-level=\"1\"><span style=\"font-weight: 400;\">A comet is <\/span><b>made up of four visible parts:<\/b><span style=\"font-weight: 400;\"> the <\/span><b>nucleus<\/b><span style=\"font-weight: 400;\">, the <\/span><b>coma<\/b><span style=\"font-weight: 400;\">, the <\/span><b>ion tail<\/b><span style=\"font-weight: 400;\">, and the <\/span><b>dust tail.\u00a0<\/b>\n<ul>\n<li style=\"font-weight: 400; text-align: justify;\" aria-level=\"1\"><span style=\"font-weight: 400;\">The <\/span><b>nucleus <\/b><span style=\"font-weight: 400;\">is a<\/span><b> solid body<\/b><span style=\"font-weight: 400;\"> typically a few kilometres in diameter and made up of a <\/span><b>mixture of volatile ice<\/b><span style=\"font-weight: 400;\">s (predominantly water ice) <\/span><b>and silicate and organic dust <\/b><span style=\"font-weight: 400;\">particles.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400; text-align: justify;\" aria-level=\"1\"><span style=\"font-weight: 400;\">The <\/span><b>coma <\/b><span style=\"font-weight: 400;\">is the<\/span><b> freely escaping atmosphere around the nucleus<\/b><span style=\"font-weight: 400;\"> that forms <\/span><b>when the comet comes close to the Sun<\/b><span style=\"font-weight: 400;\"> and the <\/span><b>volatile ices sublimate<\/b><span style=\"font-weight: 400;\">, carrying with them dust particles that are intimately mixed with the frozen ices in the nucleus.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400; text-align: justify;\" aria-level=\"1\"><span style=\"font-weight: 400;\">The<\/span><b> dust tail<\/b><span style=\"font-weight: 400;\"> forms from those dust particles and is <\/span><b>blown back by solar radiation pressure to form a long curving tail<\/b><span style=\"font-weight: 400;\"> that is <\/span><b>typically white or yellow <\/b><span style=\"font-weight: 400;\">in colour.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400; text-align: justify;\" aria-level=\"1\"><span style=\"font-weight: 400;\">The<\/span><b> ion tail<\/b><span style=\"font-weight: 400;\"> forms from the <\/span><b>volatile gases in the coma<\/b><span style=\"font-weight: 400;\"> when they are<\/span><b> ionized by ultraviolet photons from the Sun <\/b><span style=\"font-weight: 400;\">and <\/span><b>blown away by the solar wind.<\/b><\/li>\n<li style=\"font-weight: 400; text-align: justify;\" aria-level=\"1\"><b style=\"font-size: inherit;\">Ion tails<\/b> <b style=\"font-size: inherit;\">point almost exactly away from the Sun <\/b><span style=\"font-weight: 400;\">and glow <\/span><b style=\"font-size: inherit;\">bluish in colou<\/b><span style=\"font-weight: 400;\">r because of the presence of CO<\/span><span style=\"font-weight: 400;\">+<\/span><span style=\"font-weight: 400;\"> ions.<\/span><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><b>Source<\/b><span style=\"font-weight: 400;\">: <\/span><a href=\"https:\/\/www.indiatoday.in\/science\/story\/hubble-clicks-first-pictures-of-interstellar-comet-invading-our-solar-system-2759622-2025-07-22\" target=\"_blank\" rel=\"nofollow noopener\"><span style=\"font-weight: 400;\">IT<\/span><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Comets are large celestial bodies composed of dust, rock, and ice that orbit the Sun in elongated paths, often forming glowing comas and tails when near it. Read more about Comet Meaning, Materials, Latest News<\/p>\n","protected":false},"author":23,"featured_media":56864,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[1821,21,22,23],"class_list":{"0":"post-56889","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-upsc-prelims-current-affairs","8":"tag-comet","9":"tag-prelims-pointers","10":"tag-upsc-current-affairs","11":"tag-upsc-prelims-current-affairs","12":"no-featured-image-padding"},"acf":[],"_links":{"self":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/56889","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\/23"}],"replies":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/comments?post=56889"}],"version-history":[{"count":0,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/56889\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media\/56864"}],"wp:attachment":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media?parent=56889"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/categories?post=56889"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/tags?post=56889"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}