{"id":87223,"date":"2024-05-25T14:21:55","date_gmt":"2024-05-25T14:21:55","guid":{"rendered":"https:\/\/www.africa-press.net\/burkina-faso\/politique\/le-telescope-euclid-devoile-une-nouvelle-moisson-dimages-du-cosmos"},"modified":"2024-05-25T15:07:46","modified_gmt":"2024-05-25T15:07:46","slug":"le-telescope-euclid-devoile-une-nouvelle-moisson-dimages-du-cosmos","status":"publish","type":"post","link":"https:\/\/www.africa-press.net\/burkina-faso\/toutes-les-actualites\/le-telescope-euclid-devoile-une-nouvelle-moisson-dimages-du-cosmos","title":{"rendered":"Le t\u00e9lescope Euclid d\u00e9voile une nouvelle moisson d&rsquo;images du cosmos"},"content":{"rendered":"<p><span style=\"color: #ff6600\"><strong>Africa-Press &#8211; Burkina Faso. <\/strong><\/span>L&rsquo;agence spatiale europe\u0301enne (ESA) a de\u0301voile\u0301 jeudi la premie\u0300re moisson d&rsquo;images scientifiques du cosmos prises par le te\u0301lescope spatial Euclid, qui va observer deux milliards de galaxies sur six ans pour essayer de percer le myste\u0300re de l&rsquo;insaisissable matie\u0300re noire.<\/p>\n<p>Apre\u0300s son arrive\u0301e dans l&rsquo;espace en juillet dernier, Euclid avait livre\u0301 en novembre un premier jeu d&rsquo;images \u00ab\u00a0stupe\u0301fiantes\u00a0\u00bb, selon les mots du directeur de l&rsquo;ESA Josef Aschbacher. Cette fois, elles sont \u00ab\u00a0scientifiquement exploitables\u00a0\u00bb, a explique\u0301 le producteur des images et donne\u0301es scientifiques du te\u0301lescope Jean-Charles Cuillandre, astronome au Commissariat a\u0300 l&rsquo;e\u0301nergie atomique (CEA).<\/p>\n<p>Car derrie\u0300re la poigne\u0301e de photos, produites avec la participation de l&rsquo;astronome italien Giovanni Anselmi, se trouvent les donne\u0301es des onze millions de sources ce\u0301lestes qui les peuplent. Elles permettront \u00ab\u00a0aux astrophysiciens du monde entier d&rsquo;en exploiter l&rsquo;information\u00a0\u00bb, a\u0300 commencer par les signataires des dix articles scientifiques lie\u0301s aux images et parus ce jeudi.<\/p>\n<p>En vedette, l&rsquo;amas galactique Abell 2390, situe\u0301 a\u0300 environ 2,7 milliards d&rsquo;anne\u0301es lumie\u0300re de la Terre. L&rsquo;image d&rsquo;Euclid, fruit de seulement trois heures d&rsquo;observation, y a saisi plus de 50.000 galaxies.<\/p>\n<p>Au centre, des arcs lumineux signent la pre\u0301sence de matie\u0300re noire, d&rsquo;une masse telle qu&rsquo;elle de\u0301vie la lumie\u0300re de lointaines galaxies. La matie\u0300re noire, une cate\u0301gorie hypothe\u0301tique de matie\u0300re cense\u0301e constituer le quart de l&rsquo;e\u0301nergie de l&rsquo;Univers, est l&rsquo;objet ultime de la que\u0302te d&rsquo;Euclid. Tout comme l&rsquo;e\u0301nergie sombre, qui expliquerait l&rsquo;expansion de l&rsquo;Univers.<\/p>\n<p>Justement, Abell 2390 de\u0301voile une pa\u0302le lumie\u0300re dans l&rsquo;amas galactique. Elle vient d&rsquo;e\u0301toiles e\u0301jecte\u0301es dans les mouvements animant les galaxies, qui finissent par \u00ab\u00a0cre\u0301er une espe\u0300ce de nue\u0301e qui entoure l&rsquo;ensemble de l&rsquo;amas\u00a0\u00bb, raconte M. Cuillandre. Pour les astronomes, cette lumie\u0300re agit comme une \u00ab\u00a0trace\u00a0\u00bb de la matie\u0300re noire, qui tient ces e\u0301toiles solitaires dans ses filets gravitationnels.<\/p>\n<p>&#8211; Pouponnie\u0300re d&rsquo;e\u0301toiles &#8211;<\/p>\n<p>Avec la ne\u0301buleuse Messier 78, Euclid plonge dans une pouponnie\u0300re d&rsquo;e\u0301toiles, ou\u0300 des nuages mole\u0301culaires, un me\u0301lange de gaz et de poussie\u0300re, \u00ab\u00a0s&rsquo;e\u0301croulent sous leur propre poids\u00a0\u00bb. Typiquement, environ 10% de cette matie\u0300re se trouve condense\u0301e en jeunes e\u0301toiles. Une jeunesse qui les rend \u00ab\u00a0tre\u0300s actives, avec une production de vents stellaires qui vont repousser les nuages de la ne\u0301buleuse\u00a0\u00bb, poursuit l&rsquo;astronome.<\/p>\n<p>Dans l&rsquo;image d&rsquo;Euclid, les zones centrale et supe\u0301rieure montrent l&rsquo;ache\u0300vement de ce processus avec des e\u0301toiles tre\u0300s brillantes au sein de cavite\u0301s, et leurs vents stellaires qui \u00ab\u00a0ont poli, et repousse\u0301 le nuage qui est en train de se retirer\u00a0\u00bb.<\/p>\n<p>En bas de la ne\u0301buleuse en revanche, on \u00ab\u00a0commence a\u0300 voir des choses qui s&rsquo;ouvrent (&#8230;) avec des choses brillantes qui essaient de sortir\u00a0\u00bb, des e\u0301toiles pre\u0302tes a\u0300 surgir apre\u0300s une gestation se comptant en millions d&rsquo;anne\u0301es.<\/p>\n<p>Euclid peut embrasser la sce\u0300ne en une seule image gra\u0302ce a\u0300 son large champ de vue. Contrairement au te\u0301lescope spatial James Webb, &#8211; son voisin a\u0300 environ 1,5 million de km de la Terre -, qui voit moins large mais plus loin.<\/p>\n<p>De\u0301monstration avec un zoom arrie\u0300re, pour embrasser la vue d&rsquo;une grande galaxie spirale, NGC 6744, une copie de la no\u0302tre.<\/p>\n<p>Les donne\u0301es de l&rsquo;image vont permettre aux astronomes de compter ses e\u0301toiles, mais aussi de cartographier leur distribution ainsi que les nuages de gaz ou\u0300 elles se forment.<\/p>\n<p>Avec Abell 2764, l&rsquo;observateur file a\u0300 un milliard d&rsquo;anne\u0301es-lumie\u0300re de la Terre, vers une vaste e\u0301tendue noire perce\u0301e d&rsquo;une e\u0301toile jaune. L&rsquo;amas galactique et son halo de matie\u0300re noire se niche dans le coin supe\u0301rieur droit. Vu de pre\u0300s, il re\u0301ve\u0300le que \u00ab\u00a0tout le monde interagit avec tout le monde\u00a0\u00bb, avec des enveloppes stellaires e\u0301tendues et des bras de galaxies tendus les uns vers les autres.<\/p>\n<p>Enfin l&rsquo;image du groupe de la Dorade (ERO), dans la constellation e\u0301ponyme, illustre cette interaction avec deux galaxies elliptiques \u00ab\u00a0pas tre\u0300s excitantes visuellement\u00a0\u00bb certes, mais dont la relation passe\u0301e s&rsquo;expose dans les re\u0301sidus de leurs bras spiraux qui se fro\u0302lent.<\/p>\n<p>La photo rece\u0300le une surprise. Une petite galaxie naine ronde, bien visible dans une vue de pre\u0300s, traverse\u0301e par l&rsquo;e\u0301quivalent d&rsquo;un collier de perles. \u00ab\u00a0Je n&rsquo;ai jamais vu c\u0327a\u00a0\u00bb, avoue l&rsquo;astronome.<\/p>\n\r\n                <style type=\"text\/css\">\r\n                    \r\n                    #td_uid_1_69d2a2c2622d0  .td-doubleSlider-2 .td-item1 {\r\n                        background: url(https:\/\/static.africa-press.net\/burkina\/sites\/42\/2024\/05\/sm_1716636984.543766-80x60.jpg) 0 0 no-repeat;\r\n                    }\r\n                    #td_uid_1_69d2a2c2622d0  .td-doubleSlider-2 .td-item2 {\r\n                        background: url(https:\/\/static.africa-press.net\/burkina\/sites\/42\/2024\/05\/sm_1716636995.133657-80x60.jpg) 0 0 no-repeat;\r\n                    }\r\n                    #td_uid_1_69d2a2c2622d0  .td-doubleSlider-2 .td-item3 {\r\n                        background: 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L&rsquo;agence spatiale europe\u0301enne (ESA) a de\u0301voile\u0301 jeudi la premie\u0300re moisson d&rsquo;images scientifiques du cosmos prises par le te\u0301lescope spatial Euclid, qui va observer deux milliards de galaxies sur six ans pour essayer de percer le myste\u0300re de l&rsquo;insaisissable matie\u0300re noire. Apre\u0300s son arrive\u0301e dans l&rsquo;espace en juillet dernier, Euclid avait livre\u0301 [&hellip;]<\/p>\n","protected":false},"author":82,"featured_media":87222,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22,10],"tags":[111,725,29],"class_list":["post-87223","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-divers","category-toutes-les-actualites","tag-africa-press","tag-africa-press-burkina-faso","tag-burkina-faso"],"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>Le t\u00e9lescope Euclid d\u00e9voile une nouvelle moisson d&#039;images du cosmos - Burkina Faso<\/title>\n<meta name=\"description\" content=\"L&#039;agence spatiale europe\u0301enne (ESA) a de\u0301voile\u0301 jeudi la premie\u0300re moisson d&#039;images scientifiques du cosmos prises par l ...\" \/>\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\/burkina-faso\/toutes-les-actualites\/le-telescope-euclid-devoile-une-nouvelle-moisson-dimages-du-cosmos\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Le t\u00e9lescope Euclid d\u00e9voile une nouvelle moisson d&#039;images du cosmos\" \/>\n<meta property=\"og:description\" content=\"L&#039;agence spatiale europe\u0301enne (ESA) a de\u0301voile\u0301 jeudi la premie\u0300re moisson d&#039;images scientifiques du cosmos prises par l ...\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.africa-press.net\/burkina-faso\/toutes-les-actualites\/le-telescope-euclid-devoile-une-nouvelle-moisson-dimages-du-cosmos\" \/>\n<meta property=\"og:site_name\" content=\"Burkina Faso\" \/>\n<meta property=\"article:published_time\" content=\"2024-05-25T14:21:55+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-05-25T15:07:46+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/static.africa-press.net\/burkina\/sites\/42\/2024\/05\/sm_1716637010.748424.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1280\" \/>\n\t<meta property=\"og:image:height\" content=\"720\" \/>\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=\"4 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.africa-press.net\/burkina-faso\/toutes-les-actualites\/le-telescope-euclid-devoile-une-nouvelle-moisson-dimages-du-cosmos#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.africa-press.net\/burkina-faso\/toutes-les-actualites\/le-telescope-euclid-devoile-une-nouvelle-moisson-dimages-du-cosmos\"},\"author\":{\"name\":\"cfeditorfr\",\"@id\":\"https:\/\/www.africa-press.net\/burkina-faso\/#\/schema\/person\/2b1cf3cd81a31e3cd26889ca66d677f1\"},\"headline\":\"Le t\u00e9lescope Euclid d\u00e9voile une nouvelle moisson d&rsquo;images du cosmos\",\"datePublished\":\"2024-05-25T14:21:55+00:00\",\"dateModified\":\"2024-05-25T15:07:46+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.africa-press.net\/burkina-faso\/toutes-les-actualites\/le-telescope-euclid-devoile-une-nouvelle-moisson-dimages-du-cosmos\"},\"wordCount\":834,\"commentCount\":0,\"image\":{\"@id\":\"https:\/\/www.africa-press.net\/burkina-faso\/toutes-les-actualites\/le-telescope-euclid-devoile-une-nouvelle-moisson-dimages-du-cosmos#primaryimage\"},\"thumbnailUrl\":\"https:\/\/static.africa-press.net\/burkina\/sites\/42\/2024\/05\/sm_1716637010.748424.jpg\",\"keywords\":[\"Africa Press\",\"Africa Press-Burkina Faso\",\"Burkina Faso\"],\"articleSection\":[\"Divers\",\"Toutes les actualit\u00e9s\"],\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/www.africa-press.net\/burkina-faso\/toutes-les-actualites\/le-telescope-euclid-devoile-une-nouvelle-moisson-dimages-du-cosmos#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.africa-press.net\/burkina-faso\/toutes-les-actualites\/le-telescope-euclid-devoile-une-nouvelle-moisson-dimages-du-cosmos\",\"url\":\"https:\/\/www.africa-press.net\/burkina-faso\/toutes-les-actualites\/le-telescope-euclid-devoile-une-nouvelle-moisson-dimages-du-cosmos\",\"name\":\"Le t\u00e9lescope Euclid d\u00e9voile une nouvelle moisson d'images du cosmos - 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