{"id":100925,"date":"2026-04-07T14:50:56","date_gmt":"2026-04-07T14:50:56","guid":{"rendered":"https:\/\/www.africa-press.net\/tchad\/politique\/voyage-au-coeur-de-notre-galaxie"},"modified":"2026-04-07T15:37:58","modified_gmt":"2026-04-07T15:37:58","slug":"voyage-au-coeur-de-notre-galaxie","status":"publish","type":"post","link":"https:\/\/www.africa-press.net\/tchad\/toutes-les-actualites\/voyage-au-coeur-de-notre-galaxie","title":{"rendered":"Voyage Au C\u0153ur De Notre Galaxie"},"content":{"rendered":"<p><span style=\"color: #ff6600\"><strong>Africa-Press &#8211; Tchad. <\/strong><\/span>C&rsquo;est le centre de notre galaxie tel qu&rsquo;il n&rsquo;avait encore jamais e\u0301te\u0301 vu. Ce vaste panorama de 650 anne\u0301es-lumie\u0300re a e\u0301te\u0301 re\u0301alise\u0301 par le radiote\u0301lescope Alma (Atacama large milli-meter\/submillimeter array) et ses 66 antennes installe\u0301es dans le de\u0301sert d&rsquo;Atacama, au Chili. Il de\u0301voile toute la richesse de cette re\u0301gion, la zone mole\u0301culaire centrale (CMZ), entourant le trou noir supermassif niche\u0301 au c\u0153ur de la Voie lacte\u0301e.<\/p>\n<p><b>\u00ab\u00a0Nous avons e\u0301te\u0301 ve\u0301ritablement surpris par la complexite\u0301 et la richesse re\u0301ve\u0301le\u0301es\u00a0\u00bb<\/b><\/p>\n<p>\u00ab\u00a0C&rsquo;est un lieu d&rsquo;extre\u0302mes, invisible a\u0300 nos yeux, mais de\u0301sormais re\u0301ve\u0301le\u0301 avec une pre\u0301cision extraordinaire\u00a0\u00bb, s&rsquo;enthousiasme dans un communique\u0301 Ashley Barnes, astronome a\u0300 l&rsquo;Observatoire europe\u0301en austral (ESO) et membre de l&rsquo;e\u0301quipe ayant obtenu ces nouvelles donne\u0301es.<\/p>\n<p>De fait, le re\u0301sultat a de\u0301passe\u0301 les espe\u0301rances. \u00ab\u00a0Nous avions anticipe\u0301 un haut niveau de de\u0301tail lors de la conception du releve\u0301, mais nous avons e\u0301te\u0301 ve\u0301ritablement surpris par la complexite\u0301 et la richesse re\u0301ve\u0301le\u0301es par la mosai\u0308que finale\u00a0\u00bb, explique Katharina Immer, astronome a\u0300 l&rsquo;ESO et e\u0301galement membre du projet.<\/p>\n<p><b>Mieux comprendre la croissance des galaxies<\/b><\/p>\n<p>Le cliche\u0301 a e\u0301te\u0301 pris dans le domaine des ondes millime\u0301triques et submillime\u0301triques, ce qui permet de \u00ab\u00a0voir\u00a0\u00bb les mole\u0301cules de gaz froid qui peuplent l&rsquo;endroit. Et il y a foule: environ 70 mole\u0301cules diffe\u0301rentes, des plus simples comme le monoxyde de silicium, aux plus complexes comme le me\u0301thanol, l&rsquo;ace\u0301tone ou l&rsquo;e\u0301thanol.<\/p>\n<p>Tout ce gaz mole\u0301culaire circule le long de filaments et alimente, tels des cordons ombilicaux, des amas de matie\u0300re a\u0300 partir desquels les e\u0301toiles se formeront. Ce processus s&rsquo;observe ailleurs dans la Voie lacte\u0301e, mais il reste encore mal compris dans l&rsquo;environnement extre\u0302me du centre galactique, a\u0300 proximite\u0301 du trou noir central.<\/p>\n<p>\u00ab\u00a0La CMZ abrite certaines des e\u0301toiles les plus massives connues dans notre galaxie, dont beaucoup vivent rapidement et meurent jeunes,terminant leur vie dans de puissantes explosions de supernovae, voire d&rsquo;hypernovae (libe\u0301rant jusqu&rsquo;a\u0300 cent fois plus d&rsquo;e\u0301nergie qu&rsquo;une supernova, ndlr)\u00a0\u00bb, explique Steve Longmore, professeur d&rsquo;astrophysique a\u0300 l&rsquo;universite\u0301 John-Moores de Liverpool, au Royaume-Uni.<\/p>\n<p>\u00ab\u00a0En e\u0301tudiant la naissance des e\u0301toiles dans la CMZ, nous pouvons e\u0301galement mieux comprendre la croissance et l&rsquo;e\u0301volution des galaxies. Nous pensons que cette re\u0301gion partage de nombreuses caracte\u0301ristiques avec les galaxies de l&rsquo;Univers primordial, ou\u0300 les e\u0301toiles se formaient dans des environnements chaotiques et extre\u0302mes \u00ab\u00a0, conclut le chercheur.<\/p>\n<p><strong>Pour plus d&rsquo;informations et d&rsquo;analyses sur la <span style=\"color: #ff6600\">Tchad<\/span>, suivez <span style=\"color: #ff6600\">Africa-Press<\/span><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Africa-Press &#8211; Tchad. C&rsquo;est le centre de notre galaxie tel qu&rsquo;il n&rsquo;avait encore jamais e\u0301te\u0301 vu. Ce vaste panorama de 650 anne\u0301es-lumie\u0300re a e\u0301te\u0301 re\u0301alise\u0301 par le radiote\u0301lescope Alma (Atacama large milli-meter\/submillimeter array) et ses 66 antennes installe\u0301es dans le de\u0301sert d&rsquo;Atacama, au Chili. Il de\u0301voile toute la richesse de cette re\u0301gion, la zone mole\u0301culaire [&hellip;]<\/p>\n","protected":false},"author":82,"featured_media":100924,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22,10],"tags":[29],"class_list":["post-100925","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-divers","category-toutes-les-actualites","tag-tchad"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.1 (Yoast SEO v27.0) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Voyage Au C\u0153ur De Notre Galaxie - tchad<\/title>\n<meta name=\"description\" content=\"C&#039;est le centre de notre galaxie tel qu&#039;il n&#039;avait encore jamais e\u0301te\u0301 vu. 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