{"id":73969,"date":"2025-12-30T12:00:00","date_gmt":"2025-12-30T12:00:00","guid":{"rendered":"https:\/\/www.africa-press.net\/senegal\/politique\/soho-seteint-apres-30-ans-dobservations-solaires-2"},"modified":"2025-12-31T00:07:17","modified_gmt":"2025-12-31T00:07:17","slug":"soho-seteint-apres-30-ans-dobservations-solaires-2","status":"publish","type":"post","link":"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/soho-seteint-apres-30-ans-dobservations-solaires-2","title":{"rendered":"Soho S\u2019\u00e9teint Apr\u00e8s 30 Ans D\u2019Observations Solaires"},"content":{"rendered":"<p><span style=\"color: #ff6600\"><strong>Africa-Press &#8211; Senegal. <\/strong><\/span>Le 31 de\u0301cembre 2025, l\u2019observatoire SoHO (Solar and Heliospheric Observatory) enverra ses dernie\u0300res donne\u0301es avant l\u2019extinction de\u0301finitive de ses instruments. Lance\u0301 en de\u0301cembre 1995 pour une mission initiale de deux ans, l\u2019observatoire solaire et he\u0301liosphe\u0301rique aura fonctionne\u0301 pre\u0300s de quinze fois plus longtemps que pre\u0301vu.<\/p>\n<p><b>Une orbite stable<\/b><\/p>\n<p>Installe\u0301 au point de Lagrange L1, entre la Terre et le Soleil, l\u2019engin a assure\u0301 pendant trente ans une surveillance quasi ininterrompue de notre e\u0301toile, devenant un outil central pour les agences spatiales et les centres de pre\u0301vision de la me\u0301te\u0301o spatiale. Cette longe\u0301vite\u0301 exceptionnelle n\u2019allait pourtant pas de soi.<\/p>\n<p>En 1998, une de\u0301faillance logicielle avait entrai\u0302ne\u0301 la perte de contact avec le satellite pendant plusieurs mois, faisant craindre un arre\u0302t pre\u0301mature\u0301. La re\u0301cupe\u0301ration de SoHO avait alors permis de relancer une mission de\u0301ja\u0300 juge\u0301e irremplac\u0327able, ouvrant la voie a\u0300 des anne\u0301es supple\u0301mentaires d\u2019observations.<\/p>\n<p><b>Deux cycles solaires<\/b><\/p>\n<p>Cette dure\u0301e exceptionnelle aura permis a\u0300 SoHO d\u2019observer presque deux cycles solaires complets. A la cle\u0301, de nombreuses de\u0301couvertes concernant les e\u0301jections de masse coronale, ces bulles de plasma projete\u0301es a\u0300 grande vitesse, les neutrinos solaires ou encore la vitesse de rotation du noyau thermonucle\u0301aire. L\u2019apport de SoHO ne se limite pourtant pas aux phe\u0301nome\u0300nes solaires. L\u2019observatoire est aussi un chasseur de come\u0300tes exceptionnel. Il n\u2019avait pas e\u0301te\u0301 conc\u0327u pour cette activite\u0301 et pourtant, il a re\u0301ussi a\u0300 en repe\u0301rer des milliers !<\/p>\n<p>L\u2019arre\u0302t programme\u0301 de SoHO tient aujourd\u2019hui au vieillissement de ses syste\u0300mes et a\u0300 l\u2019impossibilite\u0301 de garantir durablement leur fonctionnement. Sa disparition ne signifie toutefois pas la fin de l\u2019observation solaire. D\u2019autres sondes, comme SDO, Solar Orbiter ou Parker Solar Probe, poursuivent de\u0301sormais ce travail sous des angles comple\u0301mentaires.<\/p>\n<p><strong>Pour plus d&rsquo;informations et d&rsquo;analyses sur la <span style=\"color: #ff6600\">Senegal<\/span>, suivez <span style=\"color: #ff6600\">Africa-Press<\/span><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Africa-Press &#8211; Senegal. Le 31 de\u0301cembre 2025, l\u2019observatoire SoHO (Solar and Heliospheric Observatory) enverra ses dernie\u0300res donne\u0301es avant l\u2019extinction de\u0301finitive de ses instruments. Lance\u0301 en de\u0301cembre 1995 pour une mission initiale de deux ans, l\u2019observatoire solaire et he\u0301liosphe\u0301rique aura fonctionne\u0301 pre\u0300s de quinze fois plus longtemps que pre\u0301vu. Une orbite stable Installe\u0301 au point de [&hellip;]<\/p>\n","protected":false},"author":82,"featured_media":73968,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22,10],"tags":[44],"class_list":["post-73969","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-divers","category-toutes-les-actualites","tag-senegal-2"],"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>Soho S\u2019\u00e9teint Apr\u00e8s 30 Ans D\u2019Observations Solaires - Senegal<\/title>\n<meta name=\"description\" content=\"Le 31 de\u0301cembre 2025, l\u2019observatoire SoHO (Solar and Heliospheric Observatory) enverra ses dernie\u0300res donne\u0301es avant l\u2019e ...\" \/>\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\/senegal\/toutes-les-actualites\/soho-seteint-apres-30-ans-dobservations-solaires-2\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Soho S\u2019\u00e9teint Apr\u00e8s 30 Ans D\u2019Observations Solaires\" \/>\n<meta property=\"og:description\" content=\"Le 31 de\u0301cembre 2025, l\u2019observatoire SoHO (Solar and Heliospheric Observatory) enverra ses dernie\u0300res donne\u0301es avant l\u2019e ...\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/soho-seteint-apres-30-ans-dobservations-solaires-2\" \/>\n<meta property=\"og:site_name\" content=\"Senegal\" \/>\n<meta property=\"article:published_time\" content=\"2025-12-30T12:00:00+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-12-31T00:07:17+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/static.africa-press.net\/senegal\/sites\/13\/2025\/12\/sm_1767168173.10083.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\/senegal\/toutes-les-actualites\/soho-seteint-apres-30-ans-dobservations-solaires-2#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/soho-seteint-apres-30-ans-dobservations-solaires-2\"},\"author\":{\"name\":\"cfeditorfr\",\"@id\":\"https:\/\/www.africa-press.net\/senegal\/#\/schema\/person\/2b1cf3cd81a31e3cd26889ca66d677f1\"},\"headline\":\"Soho S\u2019\u00e9teint Apr\u00e8s 30 Ans D\u2019Observations Solaires\",\"datePublished\":\"2025-12-30T12:00:00+00:00\",\"dateModified\":\"2025-12-31T00:07:17+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/soho-seteint-apres-30-ans-dobservations-solaires-2\"},\"wordCount\":351,\"commentCount\":0,\"image\":{\"@id\":\"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/soho-seteint-apres-30-ans-dobservations-solaires-2#primaryimage\"},\"thumbnailUrl\":\"https:\/\/static.africa-press.net\/senegal\/sites\/13\/2025\/12\/sm_1767168173.10083.jpg\",\"keywords\":[\"Senegal\"],\"articleSection\":[\"Divers\",\"Toutes les actualit\u00e9s\"],\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/soho-seteint-apres-30-ans-dobservations-solaires-2#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/soho-seteint-apres-30-ans-dobservations-solaires-2\",\"url\":\"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/soho-seteint-apres-30-ans-dobservations-solaires-2\",\"name\":\"Soho S\u2019\u00e9teint Apr\u00e8s 30 Ans D\u2019Observations Solaires - Senegal\",\"isPartOf\":{\"@id\":\"https:\/\/www.africa-press.net\/senegal\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/soho-seteint-apres-30-ans-dobservations-solaires-2#primaryimage\"},\"image\":{\"@id\":\"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/soho-seteint-apres-30-ans-dobservations-solaires-2#primaryimage\"},\"thumbnailUrl\":\"https:\/\/static.africa-press.net\/senegal\/sites\/13\/2025\/12\/sm_1767168173.10083.jpg\",\"datePublished\":\"2025-12-30T12:00:00+00:00\",\"dateModified\":\"2025-12-31T00:07:17+00:00\",\"author\":{\"@id\":\"https:\/\/www.africa-press.net\/senegal\/#\/schema\/person\/2b1cf3cd81a31e3cd26889ca66d677f1\"},\"description\":\"Le 31 de\u0301cembre 2025, l\u2019observatoire SoHO (Solar and Heliospheric Observatory) enverra ses dernie\u0300res donne\u0301es avant l\u2019e ...\",\"breadcrumb\":{\"@id\":\"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/soho-seteint-apres-30-ans-dobservations-solaires-2#breadcrumb\"},\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/soho-seteint-apres-30-ans-dobservations-solaires-2\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"fr-FR\",\"@id\":\"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/soho-seteint-apres-30-ans-dobservations-solaires-2#primaryimage\",\"url\":\"https:\/\/static.africa-press.net\/senegal\/sites\/13\/2025\/12\/sm_1767168173.10083.jpg\",\"contentUrl\":\"https:\/\/static.africa-press.net\/senegal\/sites\/13\/2025\/12\/sm_1767168173.10083.jpg\",\"width\":1200,\"height\":900,\"caption\":\"Soho S\u2019\u00e9teint Apr\u00e8s 30 Ans D\u2019Observations Solaires\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/soho-seteint-apres-30-ans-dobservations-solaires-2#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Accueil\",\"item\":\"https:\/\/www.africa-press.net\/senegal\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Soho S\u2019\u00e9teint Apr\u00e8s 30 Ans D\u2019Observations Solaires\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.africa-press.net\/senegal\/#website\",\"url\":\"https:\/\/www.africa-press.net\/senegal\/\",\"name\":\"Africa Press | Senegal | Homepage\",\"description\":\"Just another Africa News Agency Sites site\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.africa-press.net\/senegal\/?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\/senegal\/#\/schema\/person\/2b1cf3cd81a31e3cd26889ca66d677f1\",\"name\":\"cfeditorfr\",\"url\":\"https:\/\/www.africa-press.net\/senegal\/author\/cfeditorfr\"}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"Soho S\u2019\u00e9teint Apr\u00e8s 30 Ans D\u2019Observations Solaires - Senegal","description":"Le 31 de\u0301cembre 2025, l\u2019observatoire SoHO (Solar and Heliospheric Observatory) enverra ses dernie\u0300res donne\u0301es avant l\u2019e ...","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\/senegal\/toutes-les-actualites\/soho-seteint-apres-30-ans-dobservations-solaires-2","og_locale":"fr_FR","og_type":"article","og_title":"Soho S\u2019\u00e9teint Apr\u00e8s 30 Ans D\u2019Observations Solaires","og_description":"Le 31 de\u0301cembre 2025, l\u2019observatoire SoHO (Solar and Heliospheric Observatory) enverra ses dernie\u0300res donne\u0301es avant l\u2019e ...","og_url":"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/soho-seteint-apres-30-ans-dobservations-solaires-2","og_site_name":"Senegal","article_published_time":"2025-12-30T12:00:00+00:00","article_modified_time":"2025-12-31T00:07:17+00:00","og_image":[{"width":1200,"height":900,"url":"https:\/\/static.africa-press.net\/senegal\/sites\/13\/2025\/12\/sm_1767168173.10083.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\/senegal\/toutes-les-actualites\/soho-seteint-apres-30-ans-dobservations-solaires-2#article","isPartOf":{"@id":"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/soho-seteint-apres-30-ans-dobservations-solaires-2"},"author":{"name":"cfeditorfr","@id":"https:\/\/www.africa-press.net\/senegal\/#\/schema\/person\/2b1cf3cd81a31e3cd26889ca66d677f1"},"headline":"Soho S\u2019\u00e9teint Apr\u00e8s 30 Ans D\u2019Observations Solaires","datePublished":"2025-12-30T12:00:00+00:00","dateModified":"2025-12-31T00:07:17+00:00","mainEntityOfPage":{"@id":"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/soho-seteint-apres-30-ans-dobservations-solaires-2"},"wordCount":351,"commentCount":0,"image":{"@id":"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/soho-seteint-apres-30-ans-dobservations-solaires-2#primaryimage"},"thumbnailUrl":"https:\/\/static.africa-press.net\/senegal\/sites\/13\/2025\/12\/sm_1767168173.10083.jpg","keywords":["Senegal"],"articleSection":["Divers","Toutes les actualit\u00e9s"],"inLanguage":"fr-FR","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/soho-seteint-apres-30-ans-dobservations-solaires-2#respond"]}]},{"@type":"WebPage","@id":"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/soho-seteint-apres-30-ans-dobservations-solaires-2","url":"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/soho-seteint-apres-30-ans-dobservations-solaires-2","name":"Soho S\u2019\u00e9teint Apr\u00e8s 30 Ans D\u2019Observations Solaires - Senegal","isPartOf":{"@id":"https:\/\/www.africa-press.net\/senegal\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/soho-seteint-apres-30-ans-dobservations-solaires-2#primaryimage"},"image":{"@id":"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/soho-seteint-apres-30-ans-dobservations-solaires-2#primaryimage"},"thumbnailUrl":"https:\/\/static.africa-press.net\/senegal\/sites\/13\/2025\/12\/sm_1767168173.10083.jpg","datePublished":"2025-12-30T12:00:00+00:00","dateModified":"2025-12-31T00:07:17+00:00","author":{"@id":"https:\/\/www.africa-press.net\/senegal\/#\/schema\/person\/2b1cf3cd81a31e3cd26889ca66d677f1"},"description":"Le 31 de\u0301cembre 2025, l\u2019observatoire SoHO (Solar and Heliospheric Observatory) enverra ses dernie\u0300res donne\u0301es avant l\u2019e ...","breadcrumb":{"@id":"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/soho-seteint-apres-30-ans-dobservations-solaires-2#breadcrumb"},"inLanguage":"fr-FR","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/soho-seteint-apres-30-ans-dobservations-solaires-2"]}]},{"@type":"ImageObject","inLanguage":"fr-FR","@id":"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/soho-seteint-apres-30-ans-dobservations-solaires-2#primaryimage","url":"https:\/\/static.africa-press.net\/senegal\/sites\/13\/2025\/12\/sm_1767168173.10083.jpg","contentUrl":"https:\/\/static.africa-press.net\/senegal\/sites\/13\/2025\/12\/sm_1767168173.10083.jpg","width":1200,"height":900,"caption":"Soho S\u2019\u00e9teint Apr\u00e8s 30 Ans D\u2019Observations Solaires"},{"@type":"BreadcrumbList","@id":"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/soho-seteint-apres-30-ans-dobservations-solaires-2#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Accueil","item":"https:\/\/www.africa-press.net\/senegal\/"},{"@type":"ListItem","position":2,"name":"Soho S\u2019\u00e9teint Apr\u00e8s 30 Ans D\u2019Observations Solaires"}]},{"@type":"WebSite","@id":"https:\/\/www.africa-press.net\/senegal\/#website","url":"https:\/\/www.africa-press.net\/senegal\/","name":"Africa Press | Senegal | Homepage","description":"Just another Africa News Agency Sites site","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.africa-press.net\/senegal\/?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\/senegal\/#\/schema\/person\/2b1cf3cd81a31e3cd26889ca66d677f1","name":"cfeditorfr","url":"https:\/\/www.africa-press.net\/senegal\/author\/cfeditorfr"}]}},"_links":{"self":[{"href":"https:\/\/www.africa-press.net\/senegal\/wp-json\/wp\/v2\/posts\/73969","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.africa-press.net\/senegal\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.africa-press.net\/senegal\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.africa-press.net\/senegal\/wp-json\/wp\/v2\/users\/82"}],"replies":[{"embeddable":true,"href":"https:\/\/www.africa-press.net\/senegal\/wp-json\/wp\/v2\/comments?post=73969"}],"version-history":[{"count":0,"href":"https:\/\/www.africa-press.net\/senegal\/wp-json\/wp\/v2\/posts\/73969\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.africa-press.net\/senegal\/wp-json\/wp\/v2\/media\/73968"}],"wp:attachment":[{"href":"https:\/\/www.africa-press.net\/senegal\/wp-json\/wp\/v2\/media?parent=73969"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.africa-press.net\/senegal\/wp-json\/wp\/v2\/categories?post=73969"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.africa-press.net\/senegal\/wp-json\/wp\/v2\/tags?post=73969"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}