{"id":22103,"date":"2025-12-10T18:04:00","date_gmt":"2025-12-10T18:04:00","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=22103"},"modified":"2025-12-22T17:00:42","modified_gmt":"2025-12-22T17:00:42","slug":"derniere-image-exceptionnelle-de-la-comete-lemmon","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2025\/12\/10\/derniere-image-exceptionnelle-de-la-comete-lemmon\/","title":{"rendered":"Derni\u00e8re image (exceptionnelle) de la com\u00e8te Lemmon"},"content":{"rendered":"<p><strong>Deux astrophotographes viennent de pr\u00e9senter une incroyable image de la com\u00e8te C\/2025 A6 (Lemmon) r\u00e9alis\u00e9e il y a plusieurs semaines.<\/strong><\/p>\n<h5>Minutieux travail :<\/h5>\n<p>On croyait en avoir termin\u00e9 avec la com\u00e8te Lemmon. Apr\u00e8s avoir enchant\u00e9 les nuits du mois d&#8217;octobre, l&#8217;astre chevelu n&#8217;est plus qu&#8217;un lointain souvenir. Non seulement il ne cesse de s&#8217;\u00e9loigner, mais en plus il se situe loin derri\u00e8re le <a href=\"https:\/\/cnes.fr\/dossiers\/soleil\" target=\"_blank\" rel=\"noopener\">Soleil<\/a>, ce qui le rend inobservable. Ce sont d\u00e9sormais d&#8217;autres cibles que pointent les astrophotographes, comme par exemple <a href=\"https:\/\/www.stelvision.com\/astro\/fiche-observation\/m42-nebuleuse-orion\/\" target=\"_blank\" rel=\"noopener\">M42, la grande n\u00e9buleuse d&#8217;Orion<\/a>. Mais <a href=\"https:\/\/www.facebook.com\/photo\/?fbid=2298793580637461&amp;set=gm.1637736504254526&amp;idorvanity=227002358661288\" target=\"_blank\" rel=\"noopener\">Michael J\u00e4ger et Gerald Rhemann<\/a> n&#8217;avaient pas dit leur dernier mot. Patiemment, ils ont assembl\u00e9 plusieurs clich\u00e9s de la com\u00e8te r\u00e9alis\u00e9s le 26 octobre dernier avec une courte focale. En ne gardant que les images prises dans le bleu, ils nous d\u00e9voilent l&#8217;impressionnante queue ionique de C\/2025 A6 :<\/p>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/12\/lemmon1.jpg\" rel=\"lightbox[22103]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-22105\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/12\/lemmon1-450x176.jpg\" alt=\"\" width=\"450\" height=\"176\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/12\/lemmon1-450x176.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/12\/lemmon1-1024x399.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/12\/lemmon1-768x300.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/12\/lemmon1.jpg 1500w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<p>Rappelons que cette queue bleut\u00e9e est compos\u00e9e de mol\u00e9cules de gaz qui se sont \u00e9chapp\u00e9es de l\u2019astre chevelu. Repouss\u00e9es par la pression de radiation exerc\u00e9e par le <a href=\"https:\/\/www.aeronomie.be\/fr\/encyclopedie\/vent-solaire-flux-particules-chargees-sechappant-soleil\" target=\"_blank\" rel=\"noopener\">vent solaire<\/a>, elles \u00e9mettent \u00e0 cette occasion une lumi\u00e8re bleut\u00e9e (par <a href=\"https:\/\/fr.wikipedia.org\/wiki\/Fluorescence\" target=\"_blank\" rel=\"noopener\">fluorescence<\/a>). Cette queue ionique, qui s\u2019\u00e9tire tr\u00e8s loin derri\u00e8re le noyau de la com\u00e8te, subit les effets du champ magn\u00e9tique solaire qui en modifie l\u2019aspect en permanence. Le champ de l&#8217;image est de 11X4 degr\u00e9s, ce qui \u00e0 cette distance repr\u00e9sente une queue de plusieurs millions de kilom\u00e8tres. une valeur impressionnante, certes, mais encore bien loin des records en la mati\u00e8re : 500 millions de kilom\u00e8tres pour la com\u00e8te <a href=\"https:\/\/fr.wikipedia.org\/wiki\/C\/1996_B2_(Hyakutake)\" target=\"_blank\" rel=\"noopener\">Hyakutake<\/a> et plus d&#8217;un milliard pour <a href=\"https:\/\/www.futura-sciences.com\/sciences\/breves\/comete-queue-cette-comete-fait-7-fois-distance-terre-soleil-record-2680\/\" target=\"_blank\" rel=\"noopener\">153P\/Ikeya-Zhang<\/a> !<\/p>\n<h5>Vous pourriez aimer :<\/h5>\n<ul>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2025\/11\/11\/en-video-quand-le-vent-solaire-rencontre-la-comete-lemmon\/\" target=\"_blank\" rel=\"noopener\">En vid\u00e9o : quand le vent solaire rencontre la com\u00e8te Lemmon<\/a><\/li>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2025\/10\/22\/recit-la-comete-lemmon-dans-le-ciel-de-la-drome\/\" target=\"_blank\" rel=\"noopener\">R\u00e9cit : la com\u00e8te Lemmon dans le ciel de la Dr\u00f4me<\/a><\/li>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2025\/10\/20\/surprise-une-aurore-boreale-accompagne-la-comete-lemmon\/\" target=\"_blank\" rel=\"noopener\">Surprise : une aurore bor\u00e9ale accompagne la com\u00e8te Lemmon<\/a><\/li>\n<\/ul>\n<p>Suivez l\u2019actualit\u00e9 astronomique et d\u00e9couvrez mes images du ciel en vous abonnant \u00e0 Cielmania sur <a href=\"https:\/\/www.facebook.com\/cielmania\/\" target=\"_blank\" rel=\"noopener\">Facebook<\/a>.<\/p>\n<!-- AddThis Advanced Settings generic via filter on the_content --><!-- AddThis Share Buttons generic via filter on the_content -->","protected":false},"excerpt":{"rendered":"<p>Deux astrophotographes viennent de pr\u00e9senter une incroyable image de la com\u00e8te C\/2025 A6 (Lemmon) r\u00e9alis\u00e9e il y a plusieurs semaines. Minutieux travail : On croyait en avoir termin\u00e9 avec la com\u00e8te Lemmon. Apr\u00e8s avoir enchant\u00e9 les nuits du mois d&#8217;octobre, l&#8217;astre chevelu n&#8217;est plus qu&#8217;un lointain souvenir. Non seulement il ne cesse de s&#8217;\u00e9loigner, mais &hellip; <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2025\/12\/10\/derniere-image-exceptionnelle-de-la-comete-lemmon\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">Derni\u00e8re image (exceptionnelle) de la com\u00e8te Lemmon<\/span>  <span class=\"meta-nav\">&rarr;<\/span><\/a><!-- AddThis Advanced Settings generic via filter on get_the_excerpt --><!-- AddThis Share Buttons generic via filter on get_the_excerpt --><\/p>\n","protected":false},"author":8,"featured_media":22104,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[509],"tags":[3813,3849,758,895],"class_list":["post-22103","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites","tag-c-2025-a6-lemmon","tag-comete-lemmon","tag-gerald-rhemann","tag-michael-jager"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Derni\u00e8re image (exceptionnelle) de la com\u00e8te Lemmon<\/title>\n<meta name=\"description\" content=\"Deux astrophotographes viennent de pr\u00e9senter une incroyable image de la com\u00e8te C\/2025 A6 (Lemmon) r\u00e9alis\u00e9e il y a plusieurs semaines.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2025\/12\/10\/derniere-image-exceptionnelle-de-la-comete-lemmon\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Derni\u00e8re image (exceptionnelle) de la com\u00e8te Lemmon\" \/>\n<meta property=\"og:description\" content=\"Deux astrophotographes viennent de pr\u00e9senter une incroyable image de la com\u00e8te C\/2025 A6 (Lemmon) r\u00e9alis\u00e9e il y a plusieurs semaines.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2025\/12\/10\/derniere-image-exceptionnelle-de-la-comete-lemmon\/\" \/>\n<meta property=\"og:site_name\" content=\"CIELMANIA : le blog de Jean-Baptiste FELDMANN, photographe du ciel\" \/>\n<meta property=\"article:published_time\" content=\"2025-12-10T18:04:00+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-12-22T17:00:42+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/12\/lemmon.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1500\" \/>\n\t<meta property=\"og:image:height\" content=\"900\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Jean-Baptiste FELDMANN\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"Jean-Baptiste FELDMANN\" \/>\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\":\"WebPage\",\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/2025\/12\/10\/derniere-image-exceptionnelle-de-la-comete-lemmon\/\",\"url\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/2025\/12\/10\/derniere-image-exceptionnelle-de-la-comete-lemmon\/\",\"name\":\"Derni\u00e8re image (exceptionnelle) de la com\u00e8te Lemmon\",\"isPartOf\":{\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/2025\/12\/10\/derniere-image-exceptionnelle-de-la-comete-lemmon\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/2025\/12\/10\/derniere-image-exceptionnelle-de-la-comete-lemmon\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/12\/lemmon.jpg\",\"datePublished\":\"2025-12-10T18:04:00+00:00\",\"dateModified\":\"2025-12-22T17:00:42+00:00\",\"author\":{\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/#\/schema\/person\/62b391b709c307783237b759b62731ea\"},\"description\":\"Deux astrophotographes viennent de pr\u00e9senter une incroyable image de la com\u00e8te C\/2025 A6 (Lemmon) r\u00e9alis\u00e9e il y a plusieurs semaines.\",\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/blogs.futura-sciences.com\/feldmann\/2025\/12\/10\/derniere-image-exceptionnelle-de-la-comete-lemmon\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"fr-FR\",\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/2025\/12\/10\/derniere-image-exceptionnelle-de-la-comete-lemmon\/#primaryimage\",\"url\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/12\/lemmon.jpg\",\"contentUrl\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/12\/lemmon.jpg\",\"width\":1500,\"height\":900},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/#website\",\"url\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/\",\"name\":\"CIELMANIA : le blog de Jean-Baptiste FELDMANN, photographe du ciel\",\"description\":\"&quot;J&#039;ai en moi un besoin terrible. Dirais-je le mot? La religion. Alors, je sors la nuit et je peins des \u00e9toiles.&quot;  Vincent van Gogh\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"fr-FR\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/#\/schema\/person\/62b391b709c307783237b759b62731ea\",\"name\":\"Jean-Baptiste FELDMANN\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"fr-FR\",\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/41f96607fde7a81a14570eec74177c42?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/41f96607fde7a81a14570eec74177c42?s=96&d=mm&r=g\",\"caption\":\"Jean-Baptiste FELDMANN\"},\"url\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/author\/jbfe\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Derni\u00e8re image (exceptionnelle) de la com\u00e8te Lemmon","description":"Deux astrophotographes viennent de pr\u00e9senter une incroyable image de la com\u00e8te C\/2025 A6 (Lemmon) r\u00e9alis\u00e9e il y a plusieurs semaines.","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:\/\/blogs.futura-sciences.com\/feldmann\/2025\/12\/10\/derniere-image-exceptionnelle-de-la-comete-lemmon\/","og_locale":"fr_FR","og_type":"article","og_title":"Derni\u00e8re image (exceptionnelle) de la com\u00e8te Lemmon","og_description":"Deux astrophotographes viennent de pr\u00e9senter une incroyable image de la com\u00e8te C\/2025 A6 (Lemmon) r\u00e9alis\u00e9e il y a plusieurs semaines.","og_url":"https:\/\/blogs.futura-sciences.com\/feldmann\/2025\/12\/10\/derniere-image-exceptionnelle-de-la-comete-lemmon\/","og_site_name":"CIELMANIA : le blog de Jean-Baptiste FELDMANN, photographe du ciel","article_published_time":"2025-12-10T18:04:00+00:00","article_modified_time":"2025-12-22T17:00:42+00:00","og_image":[{"width":1500,"height":900,"url":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/12\/lemmon.jpg","type":"image\/jpeg"}],"author":"Jean-Baptiste FELDMANN","twitter_card":"summary_large_image","twitter_misc":{"\u00c9crit par":"Jean-Baptiste FELDMANN","Dur\u00e9e de lecture estim\u00e9e":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/blogs.futura-sciences.com\/feldmann\/2025\/12\/10\/derniere-image-exceptionnelle-de-la-comete-lemmon\/","url":"https:\/\/blogs.futura-sciences.com\/feldmann\/2025\/12\/10\/derniere-image-exceptionnelle-de-la-comete-lemmon\/","name":"Derni\u00e8re image (exceptionnelle) de la com\u00e8te Lemmon","isPartOf":{"@id":"https:\/\/blogs.futura-sciences.com\/feldmann\/#website"},"primaryImageOfPage":{"@id":"https:\/\/blogs.futura-sciences.com\/feldmann\/2025\/12\/10\/derniere-image-exceptionnelle-de-la-comete-lemmon\/#primaryimage"},"image":{"@id":"https:\/\/blogs.futura-sciences.com\/feldmann\/2025\/12\/10\/derniere-image-exceptionnelle-de-la-comete-lemmon\/#primaryimage"},"thumbnailUrl":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/12\/lemmon.jpg","datePublished":"2025-12-10T18:04:00+00:00","dateModified":"2025-12-22T17:00:42+00:00","author":{"@id":"https:\/\/blogs.futura-sciences.com\/feldmann\/#\/schema\/person\/62b391b709c307783237b759b62731ea"},"description":"Deux astrophotographes viennent de pr\u00e9senter une incroyable image de la com\u00e8te C\/2025 A6 (Lemmon) r\u00e9alis\u00e9e il y a plusieurs semaines.","inLanguage":"fr-FR","potentialAction":[{"@type":"ReadAction","target":["https:\/\/blogs.futura-sciences.com\/feldmann\/2025\/12\/10\/derniere-image-exceptionnelle-de-la-comete-lemmon\/"]}]},{"@type":"ImageObject","inLanguage":"fr-FR","@id":"https:\/\/blogs.futura-sciences.com\/feldmann\/2025\/12\/10\/derniere-image-exceptionnelle-de-la-comete-lemmon\/#primaryimage","url":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/12\/lemmon.jpg","contentUrl":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/12\/lemmon.jpg","width":1500,"height":900},{"@type":"WebSite","@id":"https:\/\/blogs.futura-sciences.com\/feldmann\/#website","url":"https:\/\/blogs.futura-sciences.com\/feldmann\/","name":"CIELMANIA : le blog de Jean-Baptiste FELDMANN, photographe du ciel","description":"&quot;J&#039;ai en moi un besoin terrible. Dirais-je le mot? La religion. Alors, je sors la nuit et je peins des \u00e9toiles.&quot;  Vincent van Gogh","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/blogs.futura-sciences.com\/feldmann\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"fr-FR"},{"@type":"Person","@id":"https:\/\/blogs.futura-sciences.com\/feldmann\/#\/schema\/person\/62b391b709c307783237b759b62731ea","name":"Jean-Baptiste FELDMANN","image":{"@type":"ImageObject","inLanguage":"fr-FR","@id":"https:\/\/blogs.futura-sciences.com\/feldmann\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/41f96607fde7a81a14570eec74177c42?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/41f96607fde7a81a14570eec74177c42?s=96&d=mm&r=g","caption":"Jean-Baptiste FELDMANN"},"url":"https:\/\/blogs.futura-sciences.com\/feldmann\/author\/jbfe\/"}]}},"_links":{"self":[{"href":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-json\/wp\/v2\/posts\/22103","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-json\/wp\/v2\/comments?post=22103"}],"version-history":[{"count":4,"href":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-json\/wp\/v2\/posts\/22103\/revisions"}],"predecessor-version":[{"id":22109,"href":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-json\/wp\/v2\/posts\/22103\/revisions\/22109"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-json\/wp\/v2\/media\/22104"}],"wp:attachment":[{"href":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-json\/wp\/v2\/media?parent=22103"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-json\/wp\/v2\/categories?post=22103"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-json\/wp\/v2\/tags?post=22103"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}