{"id":61372,"date":"2024-03-27T16:38:09","date_gmt":"2024-03-27T16:38:09","guid":{"rendered":"https:\/\/www.africa-press.net\/tchad\/politique\/le-telescope-spatial-europeen-euclid-recouvre-la-vue"},"modified":"2024-03-27T17:29:30","modified_gmt":"2024-03-27T17:29:30","slug":"le-telescope-spatial-europeen-euclid-recouvre-la-vue","status":"publish","type":"post","link":"https:\/\/www.africa-press.net\/tchad\/toutes-les-actualites\/le-telescope-spatial-europeen-euclid-recouvre-la-vue","title":{"rendered":"Le t\u00e9lescope spatial europ\u00e9en Euclid recouvre la vue"},"content":{"rendered":"

Africa-Press – Tchad. <\/strong><\/span>Le te\u0301lescope spatial Euclid, dont l’un des instruments e\u0301tait obstrue\u0301 par une fine couche de glace, a recouvre\u0301 la vue apre\u0300s une de\u0301licate ope\u0301ration de de\u0301givrage, a annonce\u0301 le 26 mars 2024 l’agence spatiale europe\u0301enne (ESA).<\/p>\n

\u00ab\u00a0Re\u0301sultats bien meilleurs que pre\u0301vu\u00a0\u00bb<\/b><\/p>\n

L’ESA craignait que ce givre envahissant retarde la mission, lance\u0301e en juillet 2023, pour sonder les myste\u0300res cosmiques de la matie\u0300re noire et de l’e\u0301nergie noire. La proce\u0301dure de de\u0301givrage entreprise par les e\u0301quipes au sol, qui ont re\u0301chauffe\u0301 doucement les miroirs d’Euclid, \u00ab\u00a0a donne\u0301 des re\u0301sultats bien meilleurs que pre\u0301vu\u00a0\u00bb, a de\u0301clare\u0301 l’ESA dans un communique\u0301. \u00ab\u00a0Apre\u0300s avoir re\u0301chauffe\u0301 le tout premier miroir de 34 degre\u0301s Celcius seulement, Euclid a retrouve\u0301 la vue\u00a0\u00bb, ajoute l’agence spatiale.<\/p>\n

Une couche de glace de l’e\u0301paisseur d’un brin d’ADN<\/b><\/p>\n

Les e\u0301quipes de la mission avaient remarque\u0301 de\u0300s novembre qu’un instrument du te\u0301lescope, qui restitue des images en lumie\u0300re visible, recevait moins de lumie\u0300re que pre\u0301vu, les e\u0301toiles apparaissant moins brillantes qu’elles ne devaient l’e\u0302tre. En cause, une couche de glace de l’e\u0301paisseur d’un brin d’ADN qui s’e\u0301tait accumule\u0301e sur l’optique de l’imageur d’Euclid, ope\u0301rant a\u0300 quelque 1,5 million de kilome\u0300tres de la Terre. Une des solutions aurait e\u0301te\u0301 d’activer les radiateurs embarque\u0301s pour re\u0301chauffer l’ensemble du vaisseau spatial, comme cela avait de\u0301ja\u0300 e\u0301te\u0301 fait peu apre\u0300s le lancement. Mais cette option e\u0301tait risque\u0301e car la chaleur, en dilatant les mate\u0301riaux, aurait ne\u0301cessite\u0301 un recalibrage d’au moins un mois, et retarde\u0301 la mission, expliquait la semaine dernie\u0300re a\u0300 l’AFP Ralf Kohley, l’un des responsables des ope\u0301rations de l’instrument.<\/p>\n

L’e\u0301quipe a donc commence\u0301 par les miroirs individuels, en espe\u0301rant re\u0301soudre le proble\u0300me sans avoir a\u0300 chauffer tout le te\u0301lescope. Ne sachant pas exactement ou\u0300 le givre s’e\u0301tait accumule\u0301, il fallait essayer diffe\u0301rents miroirs. Par chance, le premier miroir chauffe\u0301 e\u0301tait le bon, souligne l’ESA.<\/p>\n

Une mise a\u0300 jour complique\u0301e de son syste\u0300me informatique<\/b><\/p>\n

Euclid a connu son lot de de\u0301boires depuis son lancement. L’influence de rayons cosmiques ont d’abord perturbe\u0301 le syste\u0300me de guidage du vaisseau, imposant une mise a\u0300 jour complique\u0301e de son syste\u0300me informatique. Une lumie\u0300re solaire parasite a aussi interfe\u0301re\u0301 avec ses observations, un proble\u0300me qui a e\u0301te\u0301 re\u0301gle\u0301 avec une petite rotation du te\u0301lescope.<\/p>\n

Avec la mission Euclid, les scientifiques espe\u0300rent en apprendre plus sur la nature de l’e\u0301nergie sombre et de la matie\u0300re noire, deux entite\u0301s encore jamais observe\u0301es et cense\u0301es constituer 95% de l’Univers.<\/p>\n

Pour plus d’informations et d’analyses sur la Tchad<\/a>, suivez Africa-Press<\/a><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"

Africa-Press – Tchad. Le te\u0301lescope spatial Euclid, dont l’un des instruments e\u0301tait obstrue\u0301 par une fine couche de glace, a recouvre\u0301 la vue apre\u0300s une de\u0301licate ope\u0301ration de de\u0301givrage, a annonce\u0301 le 26 mars 2024 l’agence spatiale europe\u0301enne (ESA). \u00ab\u00a0Re\u0301sultats bien meilleurs que pre\u0301vu\u00a0\u00bb L’ESA craignait que ce givre envahissant retarde la mission, lance\u0301e en […]<\/p>\n","protected":false},"author":82,"featured_media":61371,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22,10],"tags":[37,292,29],"class_list":["post-61372","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-divers","category-toutes-les-actualites","tag-africa-press","tag-africa-press-tchad","tag-tchad"],"yoast_head":"\nLe t\u00e9lescope spatial europ\u00e9en Euclid recouvre la vue - tchad<\/title>\n<meta name=\"description\" content=\"Le te\u0301lescope spatial Euclid, dont l'un des instruments e\u0301tait obstrue\u0301 par une fine couche de glace, a recouvre\u0301 la vue ...\" \/>\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\/tchad\/toutes-les-actualites\/le-telescope-spatial-europeen-euclid-recouvre-la-vue\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Le t\u00e9lescope spatial europ\u00e9en Euclid recouvre la vue\" \/>\n<meta property=\"og:description\" content=\"Le te\u0301lescope spatial Euclid, dont l'un des instruments e\u0301tait obstrue\u0301 par une fine couche de glace, a recouvre\u0301 la vue ...\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.africa-press.net\/tchad\/toutes-les-actualites\/le-telescope-spatial-europeen-euclid-recouvre-la-vue\" \/>\n<meta property=\"og:site_name\" content=\"tchad\" \/>\n<meta property=\"article:published_time\" content=\"2024-03-27T16:38:09+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-03-27T17:29:30+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/static.africa-press.net\/tchad\/sites\/41\/2024\/03\/sm_1711547900.582305.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=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.africa-press.net\/tchad\/toutes-les-actualites\/le-telescope-spatial-europeen-euclid-recouvre-la-vue#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.africa-press.net\/tchad\/toutes-les-actualites\/le-telescope-spatial-europeen-euclid-recouvre-la-vue\"},\"author\":{\"name\":\"cfeditorfr\",\"@id\":\"https:\/\/www.africa-press.net\/tchad\/#\/schema\/person\/2b1cf3cd81a31e3cd26889ca66d677f1\"},\"headline\":\"Le t\u00e9lescope spatial europ\u00e9en Euclid recouvre la vue\",\"datePublished\":\"2024-03-27T16:38:09+00:00\",\"dateModified\":\"2024-03-27T17:29:30+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.africa-press.net\/tchad\/toutes-les-actualites\/le-telescope-spatial-europeen-euclid-recouvre-la-vue\"},\"wordCount\":523,\"commentCount\":0,\"image\":{\"@id\":\"https:\/\/www.africa-press.net\/tchad\/toutes-les-actualites\/le-telescope-spatial-europeen-euclid-recouvre-la-vue#primaryimage\"},\"thumbnailUrl\":\"https:\/\/static.africa-press.net\/tchad\/sites\/41\/2024\/03\/sm_1711547900.582305.jpg\",\"keywords\":[\"Africa Press\",\"Africa Press-Tchad\",\"Tchad\"],\"articleSection\":[\"Divers\",\"Toutes les actualit\u00e9s\"],\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/www.africa-press.net\/tchad\/toutes-les-actualites\/le-telescope-spatial-europeen-euclid-recouvre-la-vue#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.africa-press.net\/tchad\/toutes-les-actualites\/le-telescope-spatial-europeen-euclid-recouvre-la-vue\",\"url\":\"https:\/\/www.africa-press.net\/tchad\/toutes-les-actualites\/le-telescope-spatial-europeen-euclid-recouvre-la-vue\",\"name\":\"Le t\u00e9lescope spatial europ\u00e9en Euclid recouvre la vue - tchad\",\"isPartOf\":{\"@id\":\"https:\/\/www.africa-press.net\/tchad\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.africa-press.net\/tchad\/toutes-les-actualites\/le-telescope-spatial-europeen-euclid-recouvre-la-vue#primaryimage\"},\"image\":{\"@id\":\"https:\/\/www.africa-press.net\/tchad\/toutes-les-actualites\/le-telescope-spatial-europeen-euclid-recouvre-la-vue#primaryimage\"},\"thumbnailUrl\":\"https:\/\/static.africa-press.net\/tchad\/sites\/41\/2024\/03\/sm_1711547900.582305.jpg\",\"datePublished\":\"2024-03-27T16:38:09+00:00\",\"dateModified\":\"2024-03-27T17:29:30+00:00\",\"author\":{\"@id\":\"https:\/\/www.africa-press.net\/tchad\/#\/schema\/person\/2b1cf3cd81a31e3cd26889ca66d677f1\"},\"description\":\"Le te\u0301lescope spatial Euclid, dont l'un des instruments e\u0301tait obstrue\u0301 par une fine couche de glace, a recouvre\u0301 la vue ...\",\"breadcrumb\":{\"@id\":\"https:\/\/www.africa-press.net\/tchad\/toutes-les-actualites\/le-telescope-spatial-europeen-euclid-recouvre-la-vue#breadcrumb\"},\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.africa-press.net\/tchad\/toutes-les-actualites\/le-telescope-spatial-europeen-euclid-recouvre-la-vue\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"fr-FR\",\"@id\":\"https:\/\/www.africa-press.net\/tchad\/toutes-les-actualites\/le-telescope-spatial-europeen-euclid-recouvre-la-vue#primaryimage\",\"url\":\"https:\/\/static.africa-press.net\/tchad\/sites\/41\/2024\/03\/sm_1711547900.582305.jpg\",\"contentUrl\":\"https:\/\/static.africa-press.net\/tchad\/sites\/41\/2024\/03\/sm_1711547900.582305.jpg\",\"width\":1200,\"height\":900,\"caption\":\"Le t\u00e9lescope spatial europ\u00e9en Euclid recouvre la vue\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.africa-press.net\/tchad\/toutes-les-actualites\/le-telescope-spatial-europeen-euclid-recouvre-la-vue#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Accueil\",\"item\":\"https:\/\/www.africa-press.net\/tchad\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Le t\u00e9lescope spatial europ\u00e9en Euclid recouvre la vue\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.africa-press.net\/tchad\/#website\",\"url\":\"https:\/\/www.africa-press.net\/tchad\/\",\"name\":\"tchad\",\"description\":\"Just another Africa News Agency Sites site\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.africa-press.net\/tchad\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"fr-FR\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.africa-press.net\/tchad\/#\/schema\/person\/2b1cf3cd81a31e3cd26889ca66d677f1\",\"name\":\"cfeditorfr\"}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"Le t\u00e9lescope spatial europ\u00e9en Euclid recouvre la vue - tchad","description":"Le te\u0301lescope spatial Euclid, dont l'un des instruments e\u0301tait obstrue\u0301 par une fine couche de glace, a recouvre\u0301 la vue ...","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.africa-press.net\/tchad\/toutes-les-actualites\/le-telescope-spatial-europeen-euclid-recouvre-la-vue","og_locale":"fr_FR","og_type":"article","og_title":"Le t\u00e9lescope spatial europ\u00e9en Euclid recouvre la vue","og_description":"Le te\u0301lescope spatial Euclid, dont l'un des instruments e\u0301tait obstrue\u0301 par une fine couche de glace, a recouvre\u0301 la vue ...","og_url":"https:\/\/www.africa-press.net\/tchad\/toutes-les-actualites\/le-telescope-spatial-europeen-euclid-recouvre-la-vue","og_site_name":"tchad","article_published_time":"2024-03-27T16:38:09+00:00","article_modified_time":"2024-03-27T17:29:30+00:00","og_image":[{"width":1200,"height":900,"url":"https:\/\/static.africa-press.net\/tchad\/sites\/41\/2024\/03\/sm_1711547900.582305.jpg","type":"image\/jpeg"}],"author":"cfeditorfr","twitter_card":"summary_large_image","twitter_misc":{"\u00c9crit par":"cfeditorfr","Dur\u00e9e de lecture estim\u00e9e":"3 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.africa-press.net\/tchad\/toutes-les-actualites\/le-telescope-spatial-europeen-euclid-recouvre-la-vue#article","isPartOf":{"@id":"https:\/\/www.africa-press.net\/tchad\/toutes-les-actualites\/le-telescope-spatial-europeen-euclid-recouvre-la-vue"},"author":{"name":"cfeditorfr","@id":"https:\/\/www.africa-press.net\/tchad\/#\/schema\/person\/2b1cf3cd81a31e3cd26889ca66d677f1"},"headline":"Le t\u00e9lescope spatial europ\u00e9en Euclid recouvre la vue","datePublished":"2024-03-27T16:38:09+00:00","dateModified":"2024-03-27T17:29:30+00:00","mainEntityOfPage":{"@id":"https:\/\/www.africa-press.net\/tchad\/toutes-les-actualites\/le-telescope-spatial-europeen-euclid-recouvre-la-vue"},"wordCount":523,"commentCount":0,"image":{"@id":"https:\/\/www.africa-press.net\/tchad\/toutes-les-actualites\/le-telescope-spatial-europeen-euclid-recouvre-la-vue#primaryimage"},"thumbnailUrl":"https:\/\/static.africa-press.net\/tchad\/sites\/41\/2024\/03\/sm_1711547900.582305.jpg","keywords":["Africa Press","Africa Press-Tchad","Tchad"],"articleSection":["Divers","Toutes les actualit\u00e9s"],"inLanguage":"fr-FR","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/www.africa-press.net\/tchad\/toutes-les-actualites\/le-telescope-spatial-europeen-euclid-recouvre-la-vue#respond"]}]},{"@type":"WebPage","@id":"https:\/\/www.africa-press.net\/tchad\/toutes-les-actualites\/le-telescope-spatial-europeen-euclid-recouvre-la-vue","url":"https:\/\/www.africa-press.net\/tchad\/toutes-les-actualites\/le-telescope-spatial-europeen-euclid-recouvre-la-vue","name":"Le t\u00e9lescope spatial europ\u00e9en Euclid recouvre la vue - tchad","isPartOf":{"@id":"https:\/\/www.africa-press.net\/tchad\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.africa-press.net\/tchad\/toutes-les-actualites\/le-telescope-spatial-europeen-euclid-recouvre-la-vue#primaryimage"},"image":{"@id":"https:\/\/www.africa-press.net\/tchad\/toutes-les-actualites\/le-telescope-spatial-europeen-euclid-recouvre-la-vue#primaryimage"},"thumbnailUrl":"https:\/\/static.africa-press.net\/tchad\/sites\/41\/2024\/03\/sm_1711547900.582305.jpg","datePublished":"2024-03-27T16:38:09+00:00","dateModified":"2024-03-27T17:29:30+00:00","author":{"@id":"https:\/\/www.africa-press.net\/tchad\/#\/schema\/person\/2b1cf3cd81a31e3cd26889ca66d677f1"},"description":"Le te\u0301lescope spatial Euclid, dont l'un des instruments e\u0301tait obstrue\u0301 par une fine couche de glace, a recouvre\u0301 la vue ...","breadcrumb":{"@id":"https:\/\/www.africa-press.net\/tchad\/toutes-les-actualites\/le-telescope-spatial-europeen-euclid-recouvre-la-vue#breadcrumb"},"inLanguage":"fr-FR","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.africa-press.net\/tchad\/toutes-les-actualites\/le-telescope-spatial-europeen-euclid-recouvre-la-vue"]}]},{"@type":"ImageObject","inLanguage":"fr-FR","@id":"https:\/\/www.africa-press.net\/tchad\/toutes-les-actualites\/le-telescope-spatial-europeen-euclid-recouvre-la-vue#primaryimage","url":"https:\/\/static.africa-press.net\/tchad\/sites\/41\/2024\/03\/sm_1711547900.582305.jpg","contentUrl":"https:\/\/static.africa-press.net\/tchad\/sites\/41\/2024\/03\/sm_1711547900.582305.jpg","width":1200,"height":900,"caption":"Le t\u00e9lescope spatial europ\u00e9en Euclid recouvre la vue"},{"@type":"BreadcrumbList","@id":"https:\/\/www.africa-press.net\/tchad\/toutes-les-actualites\/le-telescope-spatial-europeen-euclid-recouvre-la-vue#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Accueil","item":"https:\/\/www.africa-press.net\/tchad\/"},{"@type":"ListItem","position":2,"name":"Le t\u00e9lescope spatial europ\u00e9en Euclid recouvre la vue"}]},{"@type":"WebSite","@id":"https:\/\/www.africa-press.net\/tchad\/#website","url":"https:\/\/www.africa-press.net\/tchad\/","name":"tchad","description":"Just another Africa News Agency Sites site","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.africa-press.net\/tchad\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"fr-FR"},{"@type":"Person","@id":"https:\/\/www.africa-press.net\/tchad\/#\/schema\/person\/2b1cf3cd81a31e3cd26889ca66d677f1","name":"cfeditorfr"}]}},"_links":{"self":[{"href":"https:\/\/www.africa-press.net\/tchad\/wp-json\/wp\/v2\/posts\/61372","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.africa-press.net\/tchad\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.africa-press.net\/tchad\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.africa-press.net\/tchad\/wp-json\/wp\/v2\/users\/82"}],"replies":[{"embeddable":true,"href":"https:\/\/www.africa-press.net\/tchad\/wp-json\/wp\/v2\/comments?post=61372"}],"version-history":[{"count":0,"href":"https:\/\/www.africa-press.net\/tchad\/wp-json\/wp\/v2\/posts\/61372\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.africa-press.net\/tchad\/wp-json\/wp\/v2\/media\/61371"}],"wp:attachment":[{"href":"https:\/\/www.africa-press.net\/tchad\/wp-json\/wp\/v2\/media?parent=61372"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.africa-press.net\/tchad\/wp-json\/wp\/v2\/categories?post=61372"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.africa-press.net\/tchad\/wp-json\/wp\/v2\/tags?post=61372"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}