{"id":10143,"date":"2022-09-04T14:47:30","date_gmt":"2022-09-04T14:47:30","guid":{"rendered":"https:\/\/www.africa-press.net\/madagascar\/politique\/le-telescope-james-webb-devoile-sa-premiere-image-dexoplanete"},"modified":"2022-09-04T15:03:40","modified_gmt":"2022-09-04T15:03:40","slug":"le-telescope-james-webb-devoile-sa-premiere-image-dexoplanete","status":"publish","type":"post","link":"https:\/\/www.africa-press.net\/madagascar\/toutes-les-actualites\/le-telescope-james-webb-devoile-sa-premiere-image-dexoplanete","title":{"rendered":"Le t\u00e9lescope James Webb d\u00e9voile sa premi\u00e8re image d\u2019exoplan\u00e8te"},"content":{"rendered":"

Africa-Press – Madagascar. <\/strong><\/span>Le t\u00e9lescope spatial James Webb a saisi sa premi\u00e8re image directe d\u2019une exoplan\u00e8te, c\u2019est-\u00e0-dire une plan\u00e8te \u00e9voluant en dehors de notre syst\u00e8me solaire, selon la NASA.<\/p>\n

L\u2019exoplan\u00e8te, qui r\u00e9pond au nom de HIP 65426 b, fait six \u00e0 douze fois la masse de Jupiter, une estimation que le t\u00e9lescope devrait aider \u00e0 affiner. C\u2019est une g\u00e9ante gazeuse, o\u00f9 la vie telle que nous la connaissons serait impossible.<\/p>\n

\u00c2g\u00e9e d\u2019environ 15 \u00e0 20 millions d\u2019ann\u00e9es, elle est jeune \u00e0 l\u2019\u00e9chelle des plan\u00e8tes -surtout si on la compare \u00e0 la Terre et ses quelque 4,5 milliards d\u2019ann\u00e9es-, a rappel\u00e9 la NASA.<\/p>\n

L\u2019image a \u00e9t\u00e9 publi\u00e9e en quatre exemplaires, chaque fois avec un filtre de lumi\u00e8re diff\u00e9rent. La distance importante entre cette exoplan\u00e8te et son \u00e9toile a permis de les diff\u00e9rencier plus facilement.<\/p>\n

Ce n\u2019est pas la premi\u00e8re fois qu\u2019une image directe d\u2019exoplan\u00e8te est prise. Le mythique t\u00e9lescope spatial Hubble, lanc\u00e9 en 1990 et toujours en fonctionnement, l\u2019avait d\u00e9j\u00e0 fait. Mais cette image \u201cmontre la voie \u00e0 suivre pour l\u2019exploration des exoplan\u00e8tes par Webb\u201d, estime la NASA.<\/p>\n

Le fait que le t\u00e9lescope James Webb soit parvenu \u00e0 tirer le portrait del\u2019une d\u2019elles \u201claisse entrevoir les possibilit\u00e9s futures d\u2019\u00e9tudes des mondes lointains\u201d, a poursuivi l\u2019agence. \u201cObtenir cette image, c\u2019\u00e9tait comme fouiller pour d\u00e9nicher un tr\u00e9sor spatial\u201d, a d\u00e9clar\u00e9 Aarynn Carter, chercheur \u00e0 l\u2019universit\u00e9 de Californie \u00e0 Santa Cruz, qui a travaill\u00e9 sur l\u2019analyse des clich\u00e9s.<\/p>\n

Bijou d\u2019ing\u00e9nierie d\u2019une valeur de dix milliards de dollars, le t\u00e9lescope James Webb effectue observations \u00e0 1,5 million de kilom\u00e8tres de la Terre. Fin ao\u00fbt, il avait d\u00e9tect\u00e9 pour la premi\u00e8re fois la pr\u00e9sence de CO2 dans l\u2019atmosph\u00e8re d\u2019une exoplan\u00e8te, une d\u00e9couverte qui avait enthousiasm\u00e9 les scientifiques quant \u00e0 son potentiel futur.<\/p>\n

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

Africa-Press – Madagascar. Le t\u00e9lescope spatial James Webb a saisi sa premi\u00e8re image directe d\u2019une exoplan\u00e8te, c\u2019est-\u00e0-dire une plan\u00e8te \u00e9voluant en dehors de notre syst\u00e8me solaire, selon la NASA. L\u2019exoplan\u00e8te, qui r\u00e9pond au nom de HIP 65426 b, fait six \u00e0 douze fois la masse de Jupiter, une estimation que le t\u00e9lescope devrait aider \u00e0 […]<\/p>\n","protected":false},"author":82,"featured_media":10142,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22,11,10],"tags":[36,50,49],"class_list":["post-10143","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-divers","category-homepage-french","category-toutes-les-actualites","tag-africa-press","tag-africa-press-madagascar","tag-madagascar"],"yoast_head":"\nLe t\u00e9lescope James Webb d\u00e9voile sa premi\u00e8re image d\u2019exoplan\u00e8te - Madagascar<\/title>\n<meta name=\"description\" content=\"Le t\u00e9lescope spatial James Webb a saisi sa premi\u00e8re image directe d\u2019une exoplan\u00e8te, c\u2019est-\u00e0-dire une plan\u00e8te \u00e9voluant en ...\" \/>\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\/madagascar\/toutes-les-actualites\/le-telescope-james-webb-devoile-sa-premiere-image-dexoplanete\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Le t\u00e9lescope James Webb d\u00e9voile sa premi\u00e8re image d\u2019exoplan\u00e8te\" \/>\n<meta property=\"og:description\" content=\"Le t\u00e9lescope spatial James Webb a saisi sa premi\u00e8re image directe d\u2019une exoplan\u00e8te, c\u2019est-\u00e0-dire une plan\u00e8te \u00e9voluant en ...\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.africa-press.net\/madagascar\/toutes-les-actualites\/le-telescope-james-webb-devoile-sa-premiere-image-dexoplanete\" \/>\n<meta property=\"og:site_name\" content=\"Madagascar\" \/>\n<meta property=\"article:published_time\" content=\"2022-09-04T14:47:30+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2022-09-04T15:03:40+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/static.africa-press.net\/madagascar\/sites\/56\/2022\/09\/postQueueImg_18-6314be27d1b6c.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1920\" \/>\n\t<meta property=\"og:image:height\" content=\"1080\" \/>\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\/madagascar\/toutes-les-actualites\/le-telescope-james-webb-devoile-sa-premiere-image-dexoplanete#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.africa-press.net\/madagascar\/toutes-les-actualites\/le-telescope-james-webb-devoile-sa-premiere-image-dexoplanete\"},\"author\":{\"name\":\"cfeditorfr\",\"@id\":\"https:\/\/www.africa-press.net\/madagascar\/#\/schema\/person\/2b1cf3cd81a31e3cd26889ca66d677f1\"},\"headline\":\"Le t\u00e9lescope James Webb d\u00e9voile sa premi\u00e8re image d\u2019exoplan\u00e8te\",\"datePublished\":\"2022-09-04T14:47:30+00:00\",\"dateModified\":\"2022-09-04T15:03:40+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.africa-press.net\/madagascar\/toutes-les-actualites\/le-telescope-james-webb-devoile-sa-premiere-image-dexoplanete\"},\"wordCount\":360,\"commentCount\":0,\"image\":{\"@id\":\"https:\/\/www.africa-press.net\/madagascar\/toutes-les-actualites\/le-telescope-james-webb-devoile-sa-premiere-image-dexoplanete#primaryimage\"},\"thumbnailUrl\":\"https:\/\/static.africa-press.net\/madagascar\/sites\/56\/2022\/09\/postQueueImg_18-6314be27d1b6c.jpg\",\"keywords\":[\"Africa Press\",\"Africa Press-Madagascar\",\"Madagascar\"],\"articleSection\":[\"Divers\",\"homepage-french\",\"Toutes les actualit\u00e9s\"],\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/www.africa-press.net\/madagascar\/toutes-les-actualites\/le-telescope-james-webb-devoile-sa-premiere-image-dexoplanete#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.africa-press.net\/madagascar\/toutes-les-actualites\/le-telescope-james-webb-devoile-sa-premiere-image-dexoplanete\",\"url\":\"https:\/\/www.africa-press.net\/madagascar\/toutes-les-actualites\/le-telescope-james-webb-devoile-sa-premiere-image-dexoplanete\",\"name\":\"Le t\u00e9lescope James Webb d\u00e9voile sa premi\u00e8re image d\u2019exoplan\u00e8te - 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