{"id":22294,"date":"2026-01-22T17:25:19","date_gmt":"2026-01-22T17:25:19","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=22294"},"modified":"2026-01-30T17:29:03","modified_gmt":"2026-01-30T17:29:03","slug":"curieuse-decouverte-dans-la-celebre-nebuleuse-de-la-lyre","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2026\/01\/22\/curieuse-decouverte-dans-la-celebre-nebuleuse-de-la-lyre\/","title":{"rendered":"Curieuse d\u00e9couverte dans la c\u00e9l\u00e8bre n\u00e9buleuse de la Lyre"},"content":{"rendered":"<p><strong>On croyait tout savoir sur la n\u00e9buleuse de la Lyre. De nouvelles observations r\u00e9v\u00e8lent la pr\u00e9sence d&#8217;un myst\u00e9rieux nuage de fer.\u00a0 \u00a0<\/strong><\/p>\n<h5>C\u00e9l\u00e8bre n\u00e9buleuse :<\/h5>\n<p>La n\u00e9buleuse de la Lyre est l&#8217;un des objets astronomiques les plus connus. D\u00e9couverte en 1779 par <a href=\"https:\/\/fr.wikipedia.org\/wiki\/Charles_Messier\" target=\"_blank\" rel=\"noopener\">Charles Messier<\/a>, elle est depuis l&#8217;une des cibles favorites des astronomes. Il faut dire que cette <a href=\"https:\/\/fr.wikipedia.org\/wiki\/N%C3%A9buleuse_plan%C3%A9taire\" target=\"_blank\" rel=\"noopener\">n\u00e9buleuse plan\u00e9taire<\/a> est assez brillante (<a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2017\/05\/06\/quest-lechelle-magnitudes-astronomie\/\" target=\"_blank\" rel=\"noopener\">magnitude<\/a> 9,4), et surtout facile \u00e0 pointer. Stelvision lui consacre d&#8217;ailleurs une <a href=\"https:\/\/www.stelvision.com\/astro\/fiche-observation\/m57-nebuleuse-annulaire-de-la-lyre\/\" target=\"_blank\" rel=\"noopener\">fiche d&#8217;observation<\/a> qui vous donnera toutes les informations utiles pour l&#8217;admirer. Une telle vedette ne pouvait bien s\u00fbr pas \u00e9chapper aux t\u00e9lescopes spatiaux. Le <a href=\"https:\/\/www.cite-espace.com\/actualites-spatiales\/le-webb-revisite-la-lyre\/\" target=\"_blank\" rel=\"noopener\">JWST<\/a> n&#8217;a pas manqu\u00e9 de l&#8217;immortaliser, dix ans apr\u00e8s le\u00a0 <a href=\"https:\/\/esahubble.org\/images\/heic1310a\/\" target=\"_blank\" rel=\"noopener\">t\u00e9lescope Hubble<\/a> :<\/p>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/01\/lyre2.jpg\" rel=\"lightbox[22294]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-22296\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/01\/lyre2-450x349.jpg\" alt=\"\" width=\"450\" height=\"349\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/01\/lyre2-450x349.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/01\/lyre2-768x595.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/01\/lyre2.jpg 910w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<p>Comme toutes les n\u00e9buleuses plan\u00e9taires, Messier 57 (NGC 6720) a \u00e9t\u00e9 cr\u00e9\u00e9e par l\u2019explosion d\u2019une <a href=\"https:\/\/www.futura-sciences.com\/sciences\/definitions\/univers-geante-rouge-3731\/\" target=\"_blank\" rel=\"noopener\">\u00e9toile g\u00e9ante rouge<\/a>. Cette derni\u00e8re, en fin de vie, a violemment expuls\u00e9 les couches externes de son atmosph\u00e8re. Il ne reste plus qu\u2019un noyau stellaire extr\u00eamement dense et chaud, appel\u00e9\u00a0<a href=\"https:\/\/www.futura-sciences.com\/sciences\/definitions\/univers-naine-blanche-28\/\" target=\"_blank\" rel=\"noopener\">naine blanche<\/a>. Le rayonnement ultraviolet (UV) de cette naine blanche centrale excite le gaz expuls\u00e9, le rendant lumineux.<!--more--><\/p>\n<h5>Une intrigante &#8220;barre de fer&#8221; :<\/h5>\n<p>\u00c0 l&#8217;<a href=\"https:\/\/www.iac.es\/es\/divulgacion\/noticias\/el-telescopio-william-herschel-del-observatorio-del-roque-de-los-muchachos-halla-una-misteriosa-barra?\" target=\"_blank\" rel=\"noopener\">Observatoire du Roque de los Muchachos<\/a>, aux Canaries, les astronomes ont eux aussi, d\u00e9cid\u00e9 d&#8217;immortaliser M 57. Pour cela, ils ont utilis\u00e9 le <a href=\"https:\/\/www.ing.iac.es\/astronomy\/telescopes\/wht\/\" target=\"_blank\" rel=\"noopener\">t\u00e9lescope William Herschel<\/a> de 4,2 m\u00e8tres de diam\u00e8tre, \u00e9quip\u00e9 du spectrographe <a href=\"https:\/\/weave-project.atlassian.net\/wiki\/spaces\/WEAVE\/overview\" target=\"_blank\" rel=\"noopener\">WEAVE<\/a>. En analysant leurs observations, ils ont eu la surprise de d\u00e9couvrir un nuage d&#8217;atomes de fer ionis\u00e9s, sous la forme d&#8217;une &#8220;barre&#8221; qui traverse la n\u00e9buleuse :<\/p>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/01\/lyre3.jpg\" rel=\"lightbox[22294]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-22297\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/01\/lyre3-450x349.jpg\" alt=\"\" width=\"450\" height=\"349\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/01\/lyre3-450x349.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/01\/lyre3-768x596.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/01\/lyre3.jpg 925w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<p>L&#8217;origine de cette &#8220;barre&#8221;, dont la longueur fr\u00f4le les 40 000 <a href=\"https:\/\/fr.wikipedia.org\/wiki\/Unit%C3%A9_astronomique\" target=\"_blank\" rel=\"noopener\">UA<\/a>,\u00a0 est pour l&#8217;instant inconnue. Mais les astronomes de l&#8217;<a href=\"https:\/\/www.iac.es\/es\/divulgacion\/noticias\/el-telescopio-william-herschel-del-observatorio-del-roque-de-los-muchachos-halla-una-misteriosa-barra?\" target=\"_blank\" rel=\"noopener\">IAC<\/a> n&#8217;ont qu&#8217;une h\u00e2te : pointer d&#8217;autres n\u00e9buleuses plan\u00e9taires. Histoire de v\u00e9rifier si elles aussi abritent un tel nuage d&#8217;atomes de fer ionis\u00e9s.<\/p>\n<h5>Vous pourriez aimer :<\/h5>\n<ul>\n<li style=\"list-style-type: none\">\n<ul>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2022\/09\/19\/spectaculaire-plongee-dans-la-nebuleuse-planetaire-ngc-3132\/\" target=\"_blank\" rel=\"noopener\">En vid\u00e9o : plong\u00e9e dans la n\u00e9buleuse plan\u00e9taire NGC 3132<\/a><\/li>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2021\/02\/10\/lhistoire-de-la-nebuleuse-de-la-belle-au-bois-dormant-alias-egb-9\/\" target=\"_blank\" rel=\"noopener\">EGB 9, la n\u00e9buleuse retrouv\u00e9e par des amateurs<\/a><\/li>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2024\/05\/24\/fournaise-au-coeur-de-la-nebuleuse-planetaire-ngc-2440\/\" target=\"_blank\" rel=\"noopener\">Fournaise au c\u0153ur de la n\u00e9buleuse plan\u00e9taire NGC 2440<\/a><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>Suivez l\u2019actualit\u00e9 astronomique et d\u00e9couvrez mes images du ciel en vous abonnant \u00e0 Cielmania sur\u00a0<a href=\"https:\/\/www.facebook.com\/cielmania\/\" target=\"_blank\" rel=\"noopener noreferrer\">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>On croyait tout savoir sur la n\u00e9buleuse de la Lyre. De nouvelles observations r\u00e9v\u00e8lent la pr\u00e9sence d&#8217;un myst\u00e9rieux nuage de fer.\u00a0 \u00a0 C\u00e9l\u00e8bre n\u00e9buleuse : La n\u00e9buleuse de la Lyre est l&#8217;un des objets astronomiques les plus connus. D\u00e9couverte en 1779 par Charles Messier, elle est depuis l&#8217;une des cibles favorites des astronomes. Il faut &hellip; <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2026\/01\/22\/curieuse-decouverte-dans-la-celebre-nebuleuse-de-la-lyre\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">Curieuse d\u00e9couverte dans la c\u00e9l\u00e8bre n\u00e9buleuse de la Lyre<\/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":22295,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[509],"tags":[3900,3899,3901,1064,3902],"class_list":["post-22294","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites","tag-messier-57","tag-nebuleuse-de-la-lyre","tag-ngc-6720","tag-observatoire-du-roque-de-los-muchachos","tag-telescope-herschel"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Curieuse d\u00e9couverte dans la c\u00e9l\u00e8bre n\u00e9buleuse de la Lyre<\/title>\n<meta name=\"description\" content=\"On croyait tout savoir sur la n\u00e9buleuse de la Lyre. 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