{"id":49544,"date":"2023-08-30T19:45:33","date_gmt":"2023-08-30T19:45:33","guid":{"rendered":"https:\/\/www.africa-press.net\/niger\/politique\/la-galaxie-du-tourbillon-dans-lobjectif-du-james-webb"},"modified":"2023-08-30T21:06:53","modified_gmt":"2023-08-30T21:06:53","slug":"la-galaxie-du-tourbillon-dans-lobjectif-du-james-webb","status":"publish","type":"post","link":"https:\/\/www.africa-press.net\/niger\/toutes-les-actualites\/la-galaxie-du-tourbillon-dans-lobjectif-du-james-webb","title":{"rendered":"La galaxie du Tourbillon dans l&rsquo;objectif du James Webb"},"content":{"rendered":"<p><span style=\"color: #ff6600\"><strong>Africa-Press &#8211; Niger. <\/strong><\/span>A 27 millions d&rsquo;anne\u0301es-lumie\u0300re, la galaxie M51, encore nomme\u0301e galaxie du Tourbillon, est l&rsquo;une des plus observe\u0301es par les astronomes car elle est en interaction avec une autre galaxie lenticulaire toute proche d&rsquo;elle. Sa pre\u0301sence est sans doute a\u0300 l&rsquo;origine de plusieurs caracte\u0301ristiques spe\u0301cifiques de M51 et notamment de ses bras majestueux.<\/p>\n<p><b>Comprendre la re\u0301troaction stellaire<\/b><\/p>\n<p>Ces bras ont e\u0301te\u0301 photographie\u0301s par le te\u0301lescope James Webb de la Nasa au mois d&rsquo;aou\u0302t 2023. L&rsquo;image est compose\u0301e de plusieurs cliche\u0301s qui inte\u0300grent les donne\u0301es de la came\u0301ra proche infrarouge (NIRCam) et de l\u2019instrument infrarouge moyen (MIRI). Elle a e\u0301te\u0301 prise dans le cadre du projet FEAST (Feedback in Emerging extrAgalactic Star clusTers) qui vise a\u0300 de\u0301couvrir et a\u0300 e\u0301tudier des pe\u0301pinie\u0300res d&rsquo;e\u0301toiles dans d&rsquo;autres galaxies que la no\u0302tre.<\/p>\n<p>FEAST s&rsquo;axe particulie\u0300rement sur la re\u0301troaction qu&rsquo;entrai\u0302nent les premie\u0300res e\u0301toiles forme\u0301es dans un nuage de gaz sur leur environnement direct. Le te\u0301lescope Hubble (et d&rsquo;autres) avait de\u0301ja\u0300 pu imager les premiers stades de formation d&rsquo;e\u0301toiles dans les nuages denses d&rsquo;autres galaxie ainsi que des secteurs entie\u0300rement nettoye\u0301s par l&rsquo;e\u0301nergie de ces e\u0301toiles nouvellement brillantes. Pour la premie\u0300re fois, le James Webb met en lumie\u0300re des amas d\u2019e\u0301toiles qui e\u0301mergent de leur nuage natal dans des galaxies situe\u0301es au-dela\u0300 de notre groupe local.<\/p>\n<p><b> Des bras imposants<\/b><\/p>\n<p>La galaxie M51 occupe la totalite\u0301 de l&rsquo;image. Le noyau est principalement d\u2019un blanc e\u0301clatant. Il y a une lumie\u0300re blanche et bleu pa\u0302le qui e\u0301mane des e\u0301toiles et de la poussie\u0300re au centre du noyau, mais elle est e\u0301troitement limite\u0301e a\u0300 cette zone. Les anneaux pre\u0301sentent des couleurs rouge fonce\u0301 et orange et mettent en e\u0301vidence des filaments de poussie\u0300re autour de bulles noires caverneuses. Cliquez sur l&rsquo;image pour une version HD. Cre\u0301dits : ESA\/Webb, NASA &amp; CSA, A. Adamo (Stockholm University) and the FEAST JWST team.<\/p>\n<p><strong>Pour plus d&rsquo;informations et d&rsquo;analyses sur la <a href=\"https:\/\/www.africa-press.net\/niger\">Niger<\/a>, suivez <a href=\"https:\/\/www.africa-press.net\/\">Africa-Press<\/a><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Africa-Press &#8211; Niger. A 27 millions d&rsquo;anne\u0301es-lumie\u0300re, la galaxie M51, encore nomme\u0301e galaxie du Tourbillon, est l&rsquo;une des plus observe\u0301es par les astronomes car elle est en interaction avec une autre galaxie lenticulaire toute proche d&rsquo;elle. Sa pre\u0301sence est sans doute a\u0300 l&rsquo;origine de plusieurs caracte\u0301ristiques spe\u0301cifiques de M51 et notamment de ses bras majestueux. [&hellip;]<\/p>\n","protected":false},"author":82,"featured_media":49543,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22,10],"tags":[55,60,29],"class_list":["post-49544","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-divers","category-toutes-les-actualites","tag-africa-press","tag-africa-press-niger","tag-niger"],"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>La galaxie du Tourbillon dans l&#039;objectif du James Webb - niger<\/title>\n<meta name=\"description\" content=\"A 27 millions d&#039;anne\u0301es-lumie\u0300re, la galaxie M51, encore nomme\u0301e galaxie du Tourbillon, est l&#039;une des plus observe\u0301es pa ...\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.africa-press.net\/niger\/toutes-les-actualites\/la-galaxie-du-tourbillon-dans-lobjectif-du-james-webb\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"La galaxie du Tourbillon dans l&#039;objectif du James Webb\" \/>\n<meta property=\"og:description\" content=\"A 27 millions d&#039;anne\u0301es-lumie\u0300re, la galaxie M51, encore nomme\u0301e galaxie du Tourbillon, est l&#039;une des plus observe\u0301es pa ...\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.africa-press.net\/niger\/toutes-les-actualites\/la-galaxie-du-tourbillon-dans-lobjectif-du-james-webb\" \/>\n<meta property=\"og:site_name\" content=\"niger\" \/>\n<meta property=\"article:published_time\" content=\"2023-08-30T19:45:33+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2023-08-30T21:06:53+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/static.africa-press.net\/niger\/sites\/40\/2023\/08\/sm_1693416962.890894.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"900\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"cfeditorfr\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"cfeditorfr\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.africa-press.net\/niger\/toutes-les-actualites\/la-galaxie-du-tourbillon-dans-lobjectif-du-james-webb#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.africa-press.net\/niger\/toutes-les-actualites\/la-galaxie-du-tourbillon-dans-lobjectif-du-james-webb\"},\"author\":{\"name\":\"cfeditorfr\",\"@id\":\"https:\/\/www.africa-press.net\/niger\/#\/schema\/person\/2b1cf3cd81a31e3cd26889ca66d677f1\"},\"headline\":\"La galaxie du Tourbillon dans l&rsquo;objectif du James Webb\",\"datePublished\":\"2023-08-30T19:45:33+00:00\",\"dateModified\":\"2023-08-30T21:06:53+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.africa-press.net\/niger\/toutes-les-actualites\/la-galaxie-du-tourbillon-dans-lobjectif-du-james-webb\"},\"wordCount\":396,\"commentCount\":0,\"image\":{\"@id\":\"https:\/\/www.africa-press.net\/niger\/toutes-les-actualites\/la-galaxie-du-tourbillon-dans-lobjectif-du-james-webb#primaryimage\"},\"thumbnailUrl\":\"https:\/\/static.africa-press.net\/niger\/sites\/40\/2023\/08\/sm_1693416962.890894.jpg\",\"keywords\":[\"Africa Press\",\"Africa Press-Niger\",\"Niger\"],\"articleSection\":[\"Divers\",\"Toutes les actualit\u00e9s\"],\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/www.africa-press.net\/niger\/toutes-les-actualites\/la-galaxie-du-tourbillon-dans-lobjectif-du-james-webb#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.africa-press.net\/niger\/toutes-les-actualites\/la-galaxie-du-tourbillon-dans-lobjectif-du-james-webb\",\"url\":\"https:\/\/www.africa-press.net\/niger\/toutes-les-actualites\/la-galaxie-du-tourbillon-dans-lobjectif-du-james-webb\",\"name\":\"La galaxie du Tourbillon dans l'objectif du James Webb - 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