{"id":16270,"date":"2022-10-14T15:42:54","date_gmt":"2022-10-14T15:42:54","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=16270"},"modified":"2022-10-26T16:39:41","modified_gmt":"2022-10-26T16:39:41","slug":"cette-nebuleuse-nous-cache-une-monstrueuse-protoetoile","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2022\/10\/14\/cette-nebuleuse-nous-cache-une-monstrueuse-protoetoile\/","title":{"rendered":"Cette n\u00e9buleuse nous cache une monstrueuse proto\u00e9toile"},"content":{"rendered":"<p><strong>Dans la n\u00e9buleuse RCW 120, les astronomes ont d\u00e9couvert un astre qui pourrait devenir l&#8217;une des plus brillantes \u00e9toiles de notre Galaxie.\u00a0<\/strong><\/p>\n<h5>P\u00e9pini\u00e8res pour \u00e9toiles\u00a0 :<\/h5>\n<p>Situ\u00e9e dans la <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2016\/04\/25\/constellation-scorpion-se-devoile-cassis\/\" target=\"_blank\" rel=\"noopener\">constellation du Scorpion<\/a>, \u00e0 environ 4.300 <a href=\"https:\/\/www.futura-sciences.com\/sciences\/definitions\/univers-annee-lumiere-17\/\" target=\"_blank\" rel=\"noopener\">ann\u00e9es-lumi\u00e8re<\/a>, RCW 120 porte une d\u00e9nomination qui m\u00e9rite quelques explications. Elle fait partie du catalogue RCW, un recueil d&#8217;environ 200 <a href=\"https:\/\/www.futura-sciences.com\/sciences\/definitions\/univers-nebuleuse-50\/\" target=\"_blank\" rel=\"noopener\">n\u00e9buleuses<\/a> en \u00e9mission du ciel austral. On doit sa r\u00e9alisation dans les ann\u00e9es 1960 aux astronomes<strong> R<\/strong>odgers, <strong>C<\/strong>ampbell et <strong>W<\/strong>hiteoak :<\/p>\n<figure id=\"attachment_16690\" aria-describedby=\"caption-attachment-16690\" style=\"width: 450px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/10\/constellation_scorpion-1.jpg\" rel=\"lightbox[16270]\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-16690 size-medium\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/10\/constellation_scorpion-1-450x270.jpg\" alt=\"\" width=\"450\" height=\"270\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/10\/constellation_scorpion-1-450x270.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/10\/constellation_scorpion-1-1024x614.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/10\/constellation_scorpion-1-768x460.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/10\/constellation_scorpion-1.jpg 1501w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><figcaption id=\"caption-attachment-16690\" class=\"wp-caption-text\">La n\u00e9buleuse RCW 120 se trouve dans la constellation du Scorpion. \u00a9 Christine Sasiad<\/figcaption><\/figure>\n<p>Des n\u00e9buleuses en \u00e9mission, nous en connaissons beaucoup, la plus c\u00e9l\u00e8bre \u00e9tant sans conteste la <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2021\/03\/16\/conseils-realisez-votre-premiere-photo-de-la-nebuleuse-dorion\/\" target=\"_blank\" rel=\"noopener\">n\u00e9buleuse d&#8217;Orion<\/a>. Si ces n\u00e9buleuses brillent, c&#8217;est parce que le gaz qui les compose est ionis\u00e9 par le rayonnement de jeunes \u00e9toiles chaudes. Ce sont ces proto\u00e9toiles que les astronomes cherchent \u00e0 \u00e9tudier pour reconstituer les grandes \u00e9tapes de l&#8217;\u00e9volution stellaire :<\/p>\n<figure id=\"attachment_7069\" aria-describedby=\"caption-attachment-7069\" style=\"width: 450px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2017\/01\/nebuleuse_orion.jpg\" rel=\"lightbox[16270]\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-7069\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2017\/01\/nebuleuse_orion-450x299.jpg\" alt=\"\" width=\"450\" height=\"299\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2017\/01\/nebuleuse_orion-450x299.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2017\/01\/nebuleuse_orion-768x510.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2017\/01\/nebuleuse_orion-1024x680.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2017\/01\/nebuleuse_orion.jpg 1356w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><figcaption id=\"caption-attachment-7069\" class=\"wp-caption-text\">La plus c\u00e9l\u00e8bre n\u00e9buleuse en \u00e9mission se trouve dans la constellation d&#8217;Orion. \u00a9 M. Claro<\/figcaption><\/figure>\n<p><!--more--><\/p>\n<h5>Surprise derri\u00e8re la poussi\u00e8re :<\/h5>\n<p>Pour observer ces proto\u00e9toiles, il faut s&#8217;affranchir du cocon de gaz et de poussi\u00e8re qui les enveloppe. Pour cela, on utilise des instruments qui observent dans le domaine de l&#8217;infrarouge. Ce fut le cas du <a href=\"http:\/\/www.herschel.fr\/fr\/herschel\/\" target=\"_blank\" rel=\"noopener\">t\u00e9lescope spatial Herschel<\/a>, op\u00e9rationnel entre 2009 et 2013. Alors qu&#8217;il scrutait RCW 120, il y a d\u00e9couvert une surprenante \u00e9toile embryonnaire. Dix fois plus massive que le <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2022\/06\/22\/le-soleil-dans-tous-ses-etats-pour-le-solstice-dete\/\" target=\"_blank\" rel=\"noopener\">Soleil<\/a>, elle ne cesse de grossir. Pour s&#8217;alimenter, elle peut compter sur une r\u00e9serve de gaz et de poussi\u00e8re qui avoisine les 2.000 masses solaires !<\/p>\n<figure id=\"attachment_16271\" aria-describedby=\"caption-attachment-16271\" style=\"width: 450px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/07\/rcw120.jpg\" rel=\"lightbox[16270]\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-16271\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/07\/rcw120-450x270.jpg\" alt=\"\" width=\"450\" height=\"270\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/07\/rcw120-450x270.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/07\/rcw120-1024x614.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/07\/rcw120-768x461.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/07\/rcw120.jpg 1500w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><figcaption id=\"caption-attachment-16271\" class=\"wp-caption-text\">La n\u00e9buleuse en \u00e9mission RCW 120 cache une \u00e9toile embryonnaire qui pourrait devenir l&#8217;une des plus brillantes de la Galaxie. \u00a9 CTIO\/NOIRLab\/NSF\/AURA\/T.A. Rector<\/figcaption><\/figure>\n<p>Un app\u00e9tit qui pourrait la conduire \u00e0 devenir l&#8217;une des \u00e9toiles les plus grandes et les plus brillantes de notre <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2022\/07\/22\/chili-nuit-magique-dans-le-salar-datacama\/\" target=\"_blank\" rel=\"noopener\">Galaxie<\/a>. Il nous faudrait alors modifier nos cartes du ciel austral en y incluant ce nouvel astre s&#8217;il devenait visible \u00e0 l&#8217;\u0153il nu. Mais pas de panique : pour assister \u00e0 ce spectacle, il faudra encore patienter quelques centaines de milliers d&#8217;ann\u00e9es (lire le communiqu\u00e9 de l&#8217;<a href=\"https:\/\/www.esa.int\/Science_Exploration\/Space_Science\/Herschel\/Herschel_reveals_the_hidden_side_of_star_birth\" target=\"_blank\" rel=\"noopener\">ESA<\/a>). Le clich\u00e9 ci-dessus (n&#8217;y cherchez pas la monstrueuse proto\u00e9toile cach\u00e9e par la poussi\u00e8re) a \u00e9t\u00e9 r\u00e9alis\u00e9 par l&#8217;un des t\u00e9lescopes du <a href=\"https:\/\/noirlab.edu\/public\/images\/iotw2230a\/\" target=\"_blank\" rel=\"noopener\"><em>Cerro Tololo Inter-American Observatory<\/em><\/a>.<\/p>\n<h5>Vous pourriez aimer :<\/h5>\n<ul>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2021\/11\/03\/le-telescope-hubble-sonde-une-nurserie-stellaire-dans-la-dorade\/\" target=\"_blank\" rel=\"noopener\">Le t\u00e9lescope Hubble sonde une pouponni\u00e8re c\u00e9leste<\/a><\/li>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2021\/04\/28\/deux-tetards-cosmiques-nagent-dans-la-nebuleuse-ic-410\/\" target=\"_blank\" rel=\"noopener\">Deux t\u00eatards cosmiques nagent dans la n\u00e9buleuse IC 410<\/a><\/li>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2022\/02\/04\/des-etoiles-naissent-dans-la-sombre-nebuleuse-de-lhippocampe\/\" target=\"_blank\" rel=\"noopener\">Des proto\u00e9toiles cach\u00e9es dans la n\u00e9buleuse de l&#8217;Hippocampe<\/a><\/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>Dans la n\u00e9buleuse RCW 120, les astronomes ont d\u00e9couvert un astre qui pourrait devenir l&#8217;une des plus brillantes \u00e9toiles de notre Galaxie.\u00a0 P\u00e9pini\u00e8res pour \u00e9toiles\u00a0 : Situ\u00e9e dans la constellation du Scorpion, \u00e0 environ 4.300 ann\u00e9es-lumi\u00e8re, RCW 120 porte une d\u00e9nomination qui m\u00e9rite quelques explications. Elle fait partie du catalogue RCW, un recueil d&#8217;environ 200 &hellip; <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2022\/10\/14\/cette-nebuleuse-nous-cache-une-monstrueuse-protoetoile\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">Cette n\u00e9buleuse nous cache une monstrueuse proto\u00e9toile<\/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":16271,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[84],"tags":[376,1360,745,3255,821],"class_list":["post-16270","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ciel-etoile","tag-constellation-du-scorpion","tag-nebuleuse-en-emission","tag-protoetoile","tag-rcw-120","tag-telescope-spatial-herschel"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - 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