{"id":60868,"date":"2024-03-19T16:20:28","date_gmt":"2024-03-19T16:20:28","guid":{"rendered":"https:\/\/www.africa-press.net\/tchad\/politique\/du-givre-trouble-la-vision-du-telescope-spatial-europeen-euclid"},"modified":"2024-03-19T17:51:53","modified_gmt":"2024-03-19T17:51:53","slug":"du-givre-trouble-la-vision-du-telescope-spatial-europeen-euclid","status":"publish","type":"post","link":"https:\/\/www.africa-press.net\/tchad\/toutes-les-actualites\/du-givre-trouble-la-vision-du-telescope-spatial-europeen-euclid","title":{"rendered":"Du givre trouble la vision du t\u00e9lescope spatial europ\u00e9en Euclid"},"content":{"rendered":"

Africa-Press – Tchad. <\/strong><\/span>Des scientifiques ont commence\u0301 des ope\u0301rations pour tenter d’e\u0301liminer un givre envahissant qui trouble la vision du te\u0301lescope spatial Euclid, ve\u0301ritable \u00ab\u00a0de\u0301tective de l’Univers sombre\u00a0\u00bb, a annonce\u0301 le 19 mars 2024 l’Agence spatiale europe\u0301enne (ESA).<\/p>\n

Radiateurs embarque\u0301s<\/b><\/p>\n

C’est le dernier souci technique pour cette mission de six ans, lance\u0301e en juillet 2023 pour dresser une carte des e\u0301toiles et galaxies couvrant le tiers du ciel observable. Avec cette mission, 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

De\u0300s novembre dernier, les e\u0301quipes au sol ont remarque\u0301 qu’un instrument du te\u0301lescope, qui restitue des images en lumie\u0300re visible, recevait moins de lumie\u0300re que pre\u0301vu, a explique\u0301 a\u0300 l’AFP un responsable des ope\u0301rations de l’instrument, Ralf Kohley. L’ESA pense que ce \u00ab\u00a0gros proble\u0300me\u00a0\u00bb, selon le scientifique, vient d’une fine couche de glace, de l’e\u0301paisseur d’un brin d’ADN, qui s’accumule sur l’optique de l’imageur.<\/p>\n

Tous les instruments envoye\u0301s dans l’espace emportent avec eux des quantite\u0301s infimes de vapeur d’eau, qui givrent dans le froid spatial. Peu apre\u0300s le lancement d’Euclid, les scientifiques ont active\u0301 des radiateurs embarque\u0301s, cense\u0301s chauffer le te\u0301lescope pour le de\u0301barrasser d’e\u0301ventuelles traces d’eau.<\/p>\n

\u00ab\u00a0Tout chauffer va beaucoup perturber la mission\u00a0\u00bb<\/b><\/p>\n

Cette ope\u0301ration pourrait e\u0302tre renouvele\u0301e, mais elle n’est pas sans inconve\u0301nients. \u00ab\u00a0Tout chauffer va beaucoup perturber la mission\u00a0\u00bb, explique Ralf Kohley. La chaleur, en dilatant les mate\u0301riaux, imposerait un recalibrage de tout le te\u0301lescope d’au moins un mois. C’est pourquoi l’ESA a commence\u0301 un chauffage la semaine dernie\u0300re de deux des trois miroirs du te\u0301lescope. Pre\u0301vu jusqu’a\u0300 jeudi prochain, son re\u0301sultat ne sera pas connu avant la mi-avril, selon M. Kohley. En cas d’e\u0301chec il restera la solution du chauffage de l’ensemble du te\u0301lescope Euclid.<\/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. Des scientifiques ont commence\u0301 des ope\u0301rations pour tenter d’e\u0301liminer un givre envahissant qui trouble la vision du te\u0301lescope spatial Euclid, ve\u0301ritable \u00ab\u00a0de\u0301tective de l’Univers sombre\u00a0\u00bb, a annonce\u0301 le 19 mars 2024 l’Agence spatiale europe\u0301enne (ESA). Radiateurs embarque\u0301s C’est le dernier souci technique pour cette mission de six ans, lance\u0301e en juillet 2023 […]<\/p>\n","protected":false},"author":82,"featured_media":60867,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22,10],"tags":[37,292,29],"class_list":["post-60868","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":"\nDu givre trouble la vision du t\u00e9lescope spatial europ\u00e9en Euclid - tchad<\/title>\n<meta name=\"description\" content=\"Des scientifiques ont commence\u0301 des ope\u0301rations pour tenter d'e\u0301liminer un givre envahissant qui trouble la vision du te ...\" \/>\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\/du-givre-trouble-la-vision-du-telescope-spatial-europeen-euclid\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Du givre trouble la vision du t\u00e9lescope spatial europ\u00e9en Euclid\" \/>\n<meta property=\"og:description\" content=\"Des scientifiques ont commence\u0301 des ope\u0301rations pour tenter d'e\u0301liminer un givre envahissant qui trouble la vision du te ...\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.africa-press.net\/tchad\/toutes-les-actualites\/du-givre-trouble-la-vision-du-telescope-spatial-europeen-euclid\" \/>\n<meta property=\"og:site_name\" content=\"tchad\" \/>\n<meta property=\"article:published_time\" content=\"2024-03-19T16:20:28+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-03-19T17:51:53+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/static.africa-press.net\/tchad\/sites\/41\/2024\/03\/sm_1710853164.456956.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\/tchad\/toutes-les-actualites\/du-givre-trouble-la-vision-du-telescope-spatial-europeen-euclid#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.africa-press.net\/tchad\/toutes-les-actualites\/du-givre-trouble-la-vision-du-telescope-spatial-europeen-euclid\"},\"author\":{\"name\":\"cfeditorfr\",\"@id\":\"https:\/\/www.africa-press.net\/tchad\/#\/schema\/person\/2b1cf3cd81a31e3cd26889ca66d677f1\"},\"headline\":\"Du givre trouble la vision du t\u00e9lescope spatial europ\u00e9en Euclid\",\"datePublished\":\"2024-03-19T16:20:28+00:00\",\"dateModified\":\"2024-03-19T17:51:53+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.africa-press.net\/tchad\/toutes-les-actualites\/du-givre-trouble-la-vision-du-telescope-spatial-europeen-euclid\"},\"wordCount\":392,\"commentCount\":0,\"image\":{\"@id\":\"https:\/\/www.africa-press.net\/tchad\/toutes-les-actualites\/du-givre-trouble-la-vision-du-telescope-spatial-europeen-euclid#primaryimage\"},\"thumbnailUrl\":\"https:\/\/static.africa-press.net\/tchad\/sites\/41\/2024\/03\/sm_1710853164.456956.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\/du-givre-trouble-la-vision-du-telescope-spatial-europeen-euclid#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.africa-press.net\/tchad\/toutes-les-actualites\/du-givre-trouble-la-vision-du-telescope-spatial-europeen-euclid\",\"url\":\"https:\/\/www.africa-press.net\/tchad\/toutes-les-actualites\/du-givre-trouble-la-vision-du-telescope-spatial-europeen-euclid\",\"name\":\"Du givre trouble la vision du t\u00e9lescope spatial europ\u00e9en Euclid - tchad\",\"isPartOf\":{\"@id\":\"https:\/\/www.africa-press.net\/tchad\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.africa-press.net\/tchad\/toutes-les-actualites\/du-givre-trouble-la-vision-du-telescope-spatial-europeen-euclid#primaryimage\"},\"image\":{\"@id\":\"https:\/\/www.africa-press.net\/tchad\/toutes-les-actualites\/du-givre-trouble-la-vision-du-telescope-spatial-europeen-euclid#primaryimage\"},\"thumbnailUrl\":\"https:\/\/static.africa-press.net\/tchad\/sites\/41\/2024\/03\/sm_1710853164.456956.jpg\",\"datePublished\":\"2024-03-19T16:20:28+00:00\",\"dateModified\":\"2024-03-19T17:51:53+00:00\",\"author\":{\"@id\":\"https:\/\/www.africa-press.net\/tchad\/#\/schema\/person\/2b1cf3cd81a31e3cd26889ca66d677f1\"},\"description\":\"Des scientifiques ont commence\u0301 des ope\u0301rations pour tenter d'e\u0301liminer un givre envahissant qui trouble la vision du te ...\",\"breadcrumb\":{\"@id\":\"https:\/\/www.africa-press.net\/tchad\/toutes-les-actualites\/du-givre-trouble-la-vision-du-telescope-spatial-europeen-euclid#breadcrumb\"},\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.africa-press.net\/tchad\/toutes-les-actualites\/du-givre-trouble-la-vision-du-telescope-spatial-europeen-euclid\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"fr-FR\",\"@id\":\"https:\/\/www.africa-press.net\/tchad\/toutes-les-actualites\/du-givre-trouble-la-vision-du-telescope-spatial-europeen-euclid#primaryimage\",\"url\":\"https:\/\/static.africa-press.net\/tchad\/sites\/41\/2024\/03\/sm_1710853164.456956.jpg\",\"contentUrl\":\"https:\/\/static.africa-press.net\/tchad\/sites\/41\/2024\/03\/sm_1710853164.456956.jpg\",\"width\":1200,\"height\":900,\"caption\":\"Du givre trouble la vision du t\u00e9lescope spatial europ\u00e9en Euclid\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.africa-press.net\/tchad\/toutes-les-actualites\/du-givre-trouble-la-vision-du-telescope-spatial-europeen-euclid#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Accueil\",\"item\":\"https:\/\/www.africa-press.net\/tchad\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Du givre trouble la vision du t\u00e9lescope spatial europ\u00e9en Euclid\"}]},{\"@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":"Du givre trouble la vision du t\u00e9lescope spatial europ\u00e9en Euclid - tchad","description":"Des scientifiques ont commence\u0301 des ope\u0301rations pour tenter d'e\u0301liminer un givre envahissant qui trouble la vision du te ...","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\/du-givre-trouble-la-vision-du-telescope-spatial-europeen-euclid","og_locale":"fr_FR","og_type":"article","og_title":"Du givre trouble la vision du t\u00e9lescope spatial europ\u00e9en Euclid","og_description":"Des scientifiques ont commence\u0301 des ope\u0301rations pour tenter d'e\u0301liminer un givre envahissant qui trouble la vision du te ...","og_url":"https:\/\/www.africa-press.net\/tchad\/toutes-les-actualites\/du-givre-trouble-la-vision-du-telescope-spatial-europeen-euclid","og_site_name":"tchad","article_published_time":"2024-03-19T16:20:28+00:00","article_modified_time":"2024-03-19T17:51:53+00:00","og_image":[{"width":1200,"height":900,"url":"https:\/\/static.africa-press.net\/tchad\/sites\/41\/2024\/03\/sm_1710853164.456956.jpg","type":"image\/jpeg"}],"author":"cfeditorfr","twitter_card":"summary_large_image","twitter_misc":{"\u00c9crit par":"cfeditorfr","Dur\u00e9e de lecture estim\u00e9e":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.africa-press.net\/tchad\/toutes-les-actualites\/du-givre-trouble-la-vision-du-telescope-spatial-europeen-euclid#article","isPartOf":{"@id":"https:\/\/www.africa-press.net\/tchad\/toutes-les-actualites\/du-givre-trouble-la-vision-du-telescope-spatial-europeen-euclid"},"author":{"name":"cfeditorfr","@id":"https:\/\/www.africa-press.net\/tchad\/#\/schema\/person\/2b1cf3cd81a31e3cd26889ca66d677f1"},"headline":"Du givre trouble la vision du t\u00e9lescope spatial europ\u00e9en Euclid","datePublished":"2024-03-19T16:20:28+00:00","dateModified":"2024-03-19T17:51:53+00:00","mainEntityOfPage":{"@id":"https:\/\/www.africa-press.net\/tchad\/toutes-les-actualites\/du-givre-trouble-la-vision-du-telescope-spatial-europeen-euclid"},"wordCount":392,"commentCount":0,"image":{"@id":"https:\/\/www.africa-press.net\/tchad\/toutes-les-actualites\/du-givre-trouble-la-vision-du-telescope-spatial-europeen-euclid#primaryimage"},"thumbnailUrl":"https:\/\/static.africa-press.net\/tchad\/sites\/41\/2024\/03\/sm_1710853164.456956.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\/du-givre-trouble-la-vision-du-telescope-spatial-europeen-euclid#respond"]}]},{"@type":"WebPage","@id":"https:\/\/www.africa-press.net\/tchad\/toutes-les-actualites\/du-givre-trouble-la-vision-du-telescope-spatial-europeen-euclid","url":"https:\/\/www.africa-press.net\/tchad\/toutes-les-actualites\/du-givre-trouble-la-vision-du-telescope-spatial-europeen-euclid","name":"Du givre trouble la vision du t\u00e9lescope spatial europ\u00e9en Euclid - tchad","isPartOf":{"@id":"https:\/\/www.africa-press.net\/tchad\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.africa-press.net\/tchad\/toutes-les-actualites\/du-givre-trouble-la-vision-du-telescope-spatial-europeen-euclid#primaryimage"},"image":{"@id":"https:\/\/www.africa-press.net\/tchad\/toutes-les-actualites\/du-givre-trouble-la-vision-du-telescope-spatial-europeen-euclid#primaryimage"},"thumbnailUrl":"https:\/\/static.africa-press.net\/tchad\/sites\/41\/2024\/03\/sm_1710853164.456956.jpg","datePublished":"2024-03-19T16:20:28+00:00","dateModified":"2024-03-19T17:51:53+00:00","author":{"@id":"https:\/\/www.africa-press.net\/tchad\/#\/schema\/person\/2b1cf3cd81a31e3cd26889ca66d677f1"},"description":"Des scientifiques ont commence\u0301 des ope\u0301rations pour tenter d'e\u0301liminer un givre envahissant qui trouble la vision du te ...","breadcrumb":{"@id":"https:\/\/www.africa-press.net\/tchad\/toutes-les-actualites\/du-givre-trouble-la-vision-du-telescope-spatial-europeen-euclid#breadcrumb"},"inLanguage":"fr-FR","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.africa-press.net\/tchad\/toutes-les-actualites\/du-givre-trouble-la-vision-du-telescope-spatial-europeen-euclid"]}]},{"@type":"ImageObject","inLanguage":"fr-FR","@id":"https:\/\/www.africa-press.net\/tchad\/toutes-les-actualites\/du-givre-trouble-la-vision-du-telescope-spatial-europeen-euclid#primaryimage","url":"https:\/\/static.africa-press.net\/tchad\/sites\/41\/2024\/03\/sm_1710853164.456956.jpg","contentUrl":"https:\/\/static.africa-press.net\/tchad\/sites\/41\/2024\/03\/sm_1710853164.456956.jpg","width":1200,"height":900,"caption":"Du givre trouble la vision du t\u00e9lescope spatial europ\u00e9en Euclid"},{"@type":"BreadcrumbList","@id":"https:\/\/www.africa-press.net\/tchad\/toutes-les-actualites\/du-givre-trouble-la-vision-du-telescope-spatial-europeen-euclid#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Accueil","item":"https:\/\/www.africa-press.net\/tchad\/"},{"@type":"ListItem","position":2,"name":"Du givre trouble la vision du t\u00e9lescope spatial europ\u00e9en Euclid"}]},{"@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\/60868","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=60868"}],"version-history":[{"count":0,"href":"https:\/\/www.africa-press.net\/tchad\/wp-json\/wp\/v2\/posts\/60868\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.africa-press.net\/tchad\/wp-json\/wp\/v2\/media\/60867"}],"wp:attachment":[{"href":"https:\/\/www.africa-press.net\/tchad\/wp-json\/wp\/v2\/media?parent=60868"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.africa-press.net\/tchad\/wp-json\/wp\/v2\/categories?post=60868"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.africa-press.net\/tchad\/wp-json\/wp\/v2\/tags?post=60868"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}