{"id":46000,"date":"2025-04-23T15:56:26","date_gmt":"2025-04-23T10:26:26","guid":{"rendered":"https:\/\/vajiramandravi.com\/current-affairs\/?p=46000"},"modified":"2025-05-28T15:13:19","modified_gmt":"2025-05-28T09:43:19","slug":"quantum-gravity-gradiometer","status":"publish","type":"post","link":"https:\/\/vajiramandravi.com\/current-affairs\/quantum-gravity-gradiometer\/","title":{"rendered":"Quantum Gravity Gradiometer (QGG)"},"content":{"rendered":"<h2>Quantum Gravity Gradiometer (QGG) Latest News<\/h2>\n<p>NASA scientists have proposed an innovative use of cold atom-based quantum gravity gradiometers (QGGs) to measure how the Earth\u2019s mass distribution is changing, especially due to climate change.<\/p>\n<h2>About Quantum Gravity Gradiometer (QGG)<\/h2>\n<ul>\n<li><strong>Quantum Gravity Gradiometer (QGG):\u00a0<\/strong>NASA scientists propose placing a\u00a0<strong>Quantum Gravity Gradiometer<\/strong>\u00a0onboard a satellite to detect\u00a0<strong>minute gravitational changes<\/strong>.\n<ul>\n<li>In a\u00a0<strong>QGG<\/strong>, atoms of a specific element are\u00a0<strong>cooled to near absolute zero<\/strong>\u00a0in a vacuum, transforming them into wave-like states.<\/li>\n<li><strong>Lasers manipulate these atoms<\/strong>, and the atoms undergo a\u00a0<strong>phase shift<\/strong>\u00a0directly related to the\u00a0<strong>gravitational force<\/strong>\u00a0acting upon them.<\/li>\n<li>This setup can detect\u00a0<strong>differences in acceleration<\/strong>\u00a0as small as\u00a0<strong>10\u207b\u00b9\u2075 m\/s\u00b2<\/strong>\u00a0over a distance of just\u00a0<strong>1 meter<\/strong>.<\/li>\n<\/ul>\n<\/li>\n<li>This includes estimating the mass of large formations like the\u00a0<strong>Himalayas<\/strong>\u00a0and monitoring the movement of\u00a0<strong>water, ice, and geological materials<\/strong>\u00a0with extreme precision from\u00a0<strong>low Earth orbit<\/strong>.<\/li>\n<li><strong>Gravitational force varies with mass distribution:\u00a0<\/strong>The\u00a0<strong>gravitational force<\/strong>\u00a0experienced at different points on the Earth\u2019s surface is\u00a0<strong>not uniform<\/strong>; it depends on the\u00a0<strong>mass of nearby objects<\/strong>.\n<ul>\n<li>For instance, gravitational force near a\u00a0<strong>mountain range<\/strong>\u00a0is stronger than in less dense regions, like cities or flat plains.<\/li>\n<\/ul>\n<\/li>\n<li><strong>Gravity Gradiometer:\u00a0<\/strong>It is a\u00a0<strong>highly sensitive instrument<\/strong>\u00a0that measures how gravitational acceleration\u00a0<strong>changes from one place to another<\/strong>.\n<ul>\n<li>For example, when a ball is dropped, the\u00a0<strong>acceleration due to gravity<\/strong>\u00a0can vary slightly depending on local mass differences.<\/li>\n<li>These devices are used in\u00a0<strong>resource exploration<\/strong>\u2014like locating\u00a0<strong>hydrocarbon deposits<\/strong>, as oil and gas are\u00a0<strong>less dense<\/strong>\u00a0than surrounding rock.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><strong>Source:\u00a0<\/strong><a href=\"https:\/\/www.space.com\/space-exploration\/tech\/nasa-developing-1st-ever-space-based-quantum-sensor-for-gravity-measurements\" target=\"_blank\" rel=\"nofollow noopener\">SP<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>A Quantum Gravity Gradiometer is a highly sensitive instrument that measures tiny variations in Earth&#8217;s gravitational field using quantum principles such as atom interferometry.<\/p>\n","protected":false},"author":8,"featured_media":46006,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[21,234,22,23],"class_list":{"0":"post-46000","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-quantum-gravity-gradiometer-qgg","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\/46000","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\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/comments?post=46000"}],"version-history":[{"count":0,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/46000\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media\/46006"}],"wp:attachment":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media?parent=46000"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/categories?post=46000"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/tags?post=46000"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}