{"id":32545,"date":"2023-02-11T08:48:58","date_gmt":"2023-02-11T03:18:58","guid":{"rendered":"https:\/\/vajiramandravi.com\/current-affairs\/?p=32545"},"modified":"2025-04-19T13:51:50","modified_gmt":"2025-04-19T08:21:50","slug":"giant-metrewave-radio-telescope","status":"publish","type":"post","link":"https:\/\/vajiramandravi.com\/current-affairs\/giant-metrewave-radio-telescope\/","title":{"rendered":"Giant Metrewave Radio Telescope"},"content":{"rendered":"<h3><strong>What\u2019s in today\u2019s article?<\/strong><\/h3>\n<ul>\n<li><strong>Why in news?<\/strong><\/li>\n<li><strong>What is Giant Metrewave Radio Telescope (GMRT)?<\/strong><\/li>\n<li><strong>What are the objectives of GMRT?<\/strong><\/li>\n<li><strong>What is the significance of GMRT?<\/strong><\/li>\n<li><strong>News Summary: Giant Metrewave Radio Telescope\u00a0<\/strong><\/li>\n<\/ul>\n<p><strong>\u00a0<\/strong><\/p>\n<h2><strong>Why in news?<\/strong><\/h2>\n<ul>\n<li>Scientists have expressed apprehension that the proposed Rs 16,000-crore Pune-Nashik high-speed rail project could jeopardise the operations of the Giant Metrewave Radio Telescope (GMRT) near Pune.<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h2><strong>What is Giant Metrewave Radio Telescope (GMRT)?<\/strong><\/h2>\n<ul>\n<li>GMRT is a low-frequency radio telescope that helps investigate various radio astrophysical problems ranging from nearby solar systems to the edge of the observable universe.<\/li>\n<li>Located at Khodad, 80 km north of Pune, the telescope is operated by the National Centre of Radio Astrophysics (NCRA).\n<ul>\n<li>NCRA is a part of the Tata Institute of Fundamental Research (TIFR), Mumbai.<\/li>\n<li>GMRT is a project of the Department of Atomic Energy (DAE), operating under the Tata Institute of Fundamental Research (TIFR).<\/li>\n<\/ul>\n<\/li>\n<li>It consists of 30 fully- steerable dish type antennas of 45-meter diameter each, spread over a 25-km region.\n<ul>\n<li>GMRT is presently the <strong>world\u2019s largest radio telescope operating at meter wavelength<\/strong>.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><strong>\u00a0<\/strong><\/p>\n<h2><strong>What are the objectives of GMRT?<\/strong><\/h2>\n<ul>\n<li>Although GMRT will be a very versatile instrument for investigating a variety of radio astrophysical problems, two of its most important astrophysical objectives are:\n<ul>\n<li>to detect the highly redshifted spectral line of neutral Hydrogen expected from protoclusters or protogalaxies before they condensed to form galaxies in the early phase of the Universe and\n<ul>\n<li>Redshift represents the signal\u2019s wavelength change depending on the object\u2019s location and movement.<\/li>\n<\/ul>\n<\/li>\n<li>to search for and study rapidly-rotating Pulsars in our galaxy.\n<ul>\n<li>Pulsars are rapidly rotating neutron stars with extremely high densities.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h2><strong>What is the significance of GMRT?<\/strong><\/h2>\n<ul>\n<li><strong>Highly sought-after telescope<\/strong>\n<ul>\n<li>GMRT is a unique facility functioning within the frequency bandwidth of 100 Mhz-1,500 MHz.\u00a0<\/li>\n<li>It is a highly sought-after telescope both within India and by scientists from 30-plus countries.<\/li>\n<\/ul>\n<\/li>\n<li><strong>Understanding the evolution of galaxies over cosmic time<\/strong>\n<ul>\n<li>Understanding the evolution of galaxies over cosmic time requires tracing the evolution of neutral gas at different cosmological periods.\u00a0\n<ul>\n<li>Atomic hydrogen is the basic fuel required for star formation in a galaxy.\u00a0<\/li>\n<li>When hot ionised gas from the surrounding medium of a galaxy falls onto the universe, the gas cools and forms atomic hydrogen.\u00a0<\/li>\n<li>This then becomes molecular hydrogen and eventually leads to the formation of stars.\u00a0<\/li>\n<li>Atomic hydrogen emits radio waves of 21 cm wavelength, meaning the wavelength is a direct tracer of the atomic gas content in nearby and distant galaxies.\u00a0<\/li>\n<\/ul>\n<\/li>\n<li>However, this radio signal is feeble and nearly impossible to detect the emission from a distant galaxy.<\/li>\n<li>Using GMRT data, recently scientists detected signal that was emitted from a distant galaxy when the universe was only 4.9 billion years old.<\/li>\n<\/ul>\n<\/li>\n<li><strong>Galactic and extragalactic radio sources<\/strong>\n<ul>\n<li>Because of its large collecting area and wide frequency coverage, GMRT is an useful instrument for studying many other problems at the frontiers of astrophysics.<\/li>\n<li>These include studies of Solar and planetary radio emissions; relationship between Solar activity and disturbances in the interplanetary medium etc.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><strong>\u00a0<\/strong><\/p>\n<h2><strong>News Summary: Giant Metrewave Radio Telescope\u00a0<\/strong><\/h2>\n<ul>\n<li>The Ministry of Railways gave \u2018in-principle\u2019 approval to the Pune-Nashik high-speed rail project.\n<ul>\n<li>The high-speed railway line will cover a distance of 235 km in under two hours.<\/li>\n<li>As per the proposal, trains will run at a speed of 200 km\/hr.<\/li>\n<\/ul>\n<\/li>\n<li>It is being feared that this project could jeopardise the operations of the Giant Metrewave Radio Telescope (GMRT).<\/li>\n<li>Radio noise and interference from this rail project might affect the working of GMRT.\u00a0\n<ul>\n<li>A majority of the dish antennas of GMRT come within unacceptably close range of the railway line.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<hr \/>\n<h3><strong>Q1)<\/strong>\u00a0<strong>In which Indian state is the Giant Metrewave radio Telescope located?<\/strong><\/h3>\n<p>The Giant Metrewave Radio Telescope (GMRT) is located at Khodad, 80 km away from Pune, in the state of Maharashtra.<\/p>\n<p>&nbsp;<\/p>\n<h3><strong>Q2)<\/strong>\u00a0<strong>What are pulsars?<\/strong>\u00a0<\/h3>\n<p>Pulsars are rapidly rotating neutron stars that blast out pulses of radiation at regular intervals ranging from seconds to milliseconds.<\/p>\n<p>&nbsp;<\/p>\n<hr \/>\n<p><strong>Source:\u00a0<\/strong><a href=\"https:\/\/indianexpress.com\/article\/cities\/bangalore\/rail-tracks-too-close-scientists-air-concern-for-worlds-largest-radio-telescope-8437820\/#:~:text=The%20proposed%20Rs%2016%2C000%2Dcrore,by%20Maharail%2C%20on%20February%205.\" target=\"_blank\" rel=\"nofollow noopener\"><u>Rail tracks too close, scientists air concern for world\u2019s largest radio telescope<\/u><\/a>\u00a0 <strong>|<\/strong>\u00a0 <a href=\"http:\/\/www.gmrt.ncra.tifr.res.in\/gmrt\/goals_gmrt.html\" target=\"_blank\" rel=\"nofollow noopener\"><u>Giant Metrewave Radio Telescope<\/u><\/a>\u00a0 <strong>|<\/strong>\u00a0 <a href=\"https:\/\/www.downtoearth.org.in\/news\/science-technology\/giant-metrewave-radio-telescope-in-pune-helps-detect-atomic-hydrogen-from-far-away-galaxy-87187\" target=\"_blank\" rel=\"nofollow noopener\"><u>Down To Earth<\/u><\/a><\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>GMRT is a very versatile instrument for investigating a variety of radio astrophysical problems.<\/p>\n","protected":false},"author":5,"featured_media":32546,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[18],"tags":[],"class_list":{"0":"post-32545","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-upsc-mains-current-affairs","8":"no-featured-image-padding"},"acf":[],"_links":{"self":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/32545","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=32545"}],"version-history":[{"count":0,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/32545\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media\/32546"}],"wp:attachment":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media?parent=32545"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/categories?post=32545"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/tags?post=32545"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}