{"id":12847,"date":"2020-11-09T18:09:41","date_gmt":"2020-11-09T18:09:41","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=12847"},"modified":"2020-11-20T17:57:49","modified_gmt":"2020-11-20T17:57:49","slug":"la-comete-c-2020-m3-atlas-traverse-le-coeur-dorion","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2020\/11\/09\/la-comete-c-2020-m3-atlas-traverse-le-coeur-dorion\/","title":{"rendered":"La com\u00e8te C\/2020 M3 (Atlas) traverse le c\u0153ur d&#8217;Orion"},"content":{"rendered":"<p><strong>En passant devant la constellation d&#8217;Orion, la com\u00e8te C\/2020 M3 (Atlas) n&#8217;a pas manqu\u00e9 de saluer les plus belles n\u00e9buleuses du ciel d&#8217;hiver.\u00a0<\/strong><\/p>\n<h5>Rencontre f\u00e9\u00e9rique :<\/h5>\n<p>Beaucoup plus discr\u00e8te que <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2020\/08\/25\/la-comete-neowise-immortalisee-par-le-telescope-hubble\/\" target=\"_blank\" rel=\"noopener noreferrer\">Neowise<\/a> lors de son passage cet \u00e9t\u00e9, la com\u00e8te C\/2020 M3 (Atlas) est actuellement de <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2017\/05\/06\/quest-lechelle-magnitudes-astronomie\/\" target=\"_blank\" rel=\"noopener noreferrer\">magnitude<\/a> 7,5. Sa trajectoire l&#8217;am\u00e8ne ce mois-ci \u00e0 passer devant la constellation d&#8217;Orion. C&#8217;est l\u00e0 que sont localis\u00e9es deux des plus belles n\u00e9buleuses du ciel bor\u00e9al. Messier 42 la <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2017\/01\/16\/nebuleuse-dorion-se-devoile-ciel-noir-dalqueva\/\" target=\"_blank\" rel=\"noopener noreferrer\">grande n\u00e9buleuse d\u2019Orion<\/a> et IC 434, la <a href=\"https:\/\/www.futura-sciences.com\/sciences\/photos\/univers-ciel-profond-vu-astrophotographes-images-510\/photos-ic434-tete-cheval-847\/\" target=\"_blank\" rel=\"noopener noreferrer\">n\u00e9buleuse de la T\u00eate de cheval<\/a>.<\/p>\n<figure id=\"attachment_12848\" aria-describedby=\"caption-attachment-12848\" style=\"width: 450px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2020\/11\/comet.jpg\" rel=\"lightbox[12847]\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-12848\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2020\/11\/comet-450x301.jpg\" alt=\"\" width=\"450\" height=\"301\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2020\/11\/comet-450x301.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2020\/11\/comet-1024x685.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2020\/11\/comet-768x514.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2020\/11\/comet.jpg 1500w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><figcaption id=\"caption-attachment-12848\" class=\"wp-caption-text\">La com\u00e8te C\/202 M3 (Atlas) le 8 novembre du c\u00f4t\u00e9 des joyaux d&#8217;Orion. \u00a9 Michael Jaeger<\/figcaption><\/figure>\n<p>L&#8217;astrophotographe amateur autrichien <a href=\"https:\/\/cometpieces-at.webnode.at\/\" target=\"_blank\" rel=\"noopener noreferrer\">Michael Jaeger<\/a> est un grand sp\u00e9cialiste de l&#8217;imagerie des com\u00e8tes. Il n&#8217;a donc pas manqu\u00e9 d&#8217;immortaliser cette rencontre. Bien entendu de tels rapprochements ne sont qu\u2019apparents. La com\u00e8te circule \u00e0 quelques centaines de millions de kilom\u00e8tres alors que la distance des n\u00e9buleuses et \u00e9toiles crois\u00e9es se compte en centaines d\u2019ann\u00e9es-lumi\u00e8re.<!--more--><\/p>\n<h5>Festival de couleurs :<\/h5>\n<p>L&#8217;image (visible sur <a href=\"https:\/\/spaceweathergallery.com\/indiv_upload.php?upload_id=169509\" target=\"_blank\" rel=\"noopener noreferrer\"><em>Spaceweather<\/em><\/a>) est riche en couleurs. Le vert de la com\u00e8te provient du carbone diatomique et du cyanog\u00e8ne \u00e9mis par l&#8217;astre chevelu. Les r\u00e9gions riches en poussi\u00e8re renvoient la lumi\u00e8re bleue de chaudes \u00e9toiles. La couleur rouge des n\u00e9buleuses correspond \u00e0 l&#8217;hydrog\u00e8ne ionis\u00e9 par ces m\u00eames \u00e9toiles. C&#8217;est devant les volutes rouges de IC 434 que se d\u00e9tache le nuage de poussi\u00e8re obscur Barnard 33 (comparable \u00e0 <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2014\/12\/16\/barnard-68-la-botte-du-pere-noel\/\" target=\"_blank\" rel=\"noopener noreferrer\">Barnard 68<\/a>) en forme de t\u00eate de cheval.<\/p>\n<figure id=\"attachment_12728\" aria-describedby=\"caption-attachment-12728\" style=\"width: 450px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2020\/10\/atlas.jpg\" rel=\"lightbox[12847]\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-12728\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2020\/10\/atlas-450x270.jpg\" alt=\"\" width=\"450\" height=\"270\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2020\/10\/atlas-450x270.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2020\/10\/atlas-1024x614.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2020\/10\/atlas-768x461.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2020\/10\/atlas.jpg 1500w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><figcaption id=\"caption-attachment-12728\" class=\"wp-caption-text\">La com\u00e8te C\/2020 M3 (Atlas) traverse la constellation d&#8217;Orion. \u00a9 Jean-Baptiste Feldmann<\/figcaption><\/figure>\n<p>Messier 42 se situe \u00e0 1.300 ann\u00e9es-lumi\u00e8re, IC 434 \u00e0 1.600. Avec une magnitude de 3,7 la premi\u00e8re a \u00e9t\u00e9 d\u00e9couverte en en 1610 par l&#8217;astronome fran\u00e7ais Nicolas-Claude Fabri de Peiresc. Beaucoup plus faible, la n\u00e9buleuse de la T\u00eate de cheval a \u00e9t\u00e9 rep\u00e9r\u00e9e pour la premi\u00e8re fois sur une plaque photographique en 1888 par l&#8217;astronome am\u00e9ricaine Williamina Fleming.<\/p>\n<figure id=\"attachment_12730\" aria-describedby=\"caption-attachment-12730\" style=\"width: 355px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2020\/10\/atlas2.jpg\" rel=\"lightbox[12847]\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-12730\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2020\/10\/atlas2-355x450.jpg\" alt=\"\" width=\"355\" height=\"450\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2020\/10\/atlas2-355x450.jpg 355w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2020\/10\/atlas2.jpg 565w\" sizes=\"auto, (max-width: 355px) 100vw, 355px\" \/><\/a><figcaption id=\"caption-attachment-12730\" class=\"wp-caption-text\">Trajectoire de la com\u00e8te C\/2020 M3 (Atlas) en novembre et d\u00e9cembre.<\/figcaption><\/figure>\n<p><strong>Vous pourriez aimer :<\/strong><\/p>\n<ul>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2020\/07\/19\/la-comete-neowise-dans-le-parc-naturel-regional-du-morvan\/\" target=\"_blank\" rel=\"noopener noreferrer\">La com\u00e8te Neowise dans le Parc Naturel R\u00e9gional du Morvan<\/a><\/li>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2019\/10\/22\/les-etoiles-dorion-un-roman-historique-a-decouvrir\/\" target=\"_blank\" rel=\"noopener noreferrer\">Les \u00e9toiles d\u2019Orion, un roman historique \u00e0 d\u00e9couvrir<\/a><\/li>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2019\/05\/10\/a-pompei-une-mosaique-illustre-le-mythe-dorion-et-du-scorpion\/\" target=\"_blank\" rel=\"noopener noreferrer\">Pomp\u00e9i : une mosa\u00efque illustre le mythe d\u2019Orion et du Scorpion<\/a><\/li>\n<\/ul>\n<p>Suivez l\u2019actualit\u00e9 astronomique en vous abonnant \u00e0 Cielmania sur\u00a0<a href=\"https:\/\/www.facebook.com\/cielmania\/\" target=\"_blank\" rel=\"noopener noreferrer\">Facebook<\/a>\u00a0ou\u00a0<a href=\"https:\/\/twitter.com\/cielmania\" target=\"_blank\" rel=\"noopener noreferrer\">Twitter<\/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>En passant devant la constellation d&#8217;Orion, la com\u00e8te C\/2020 M3 (Atlas) n&#8217;a pas manqu\u00e9 de saluer les plus belles n\u00e9buleuses du ciel d&#8217;hiver.\u00a0 Rencontre f\u00e9\u00e9rique : Beaucoup plus discr\u00e8te que Neowise lors de son passage cet \u00e9t\u00e9, la com\u00e8te C\/2020 M3 (Atlas) est actuellement de magnitude 7,5. Sa trajectoire l&#8217;am\u00e8ne ce mois-ci \u00e0 passer devant &hellip; <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2020\/11\/09\/la-comete-c-2020-m3-atlas-traverse-le-coeur-dorion\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">La com\u00e8te C\/2020 M3 (Atlas) traverse le c\u0153ur d&#8217;Orion<\/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":12848,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[509],"tags":[1362,2943,354,1364,353,1363],"class_list":["post-12847","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites","tag-barnard-33","tag-comete-c-2020-m3-atlas","tag-constellation-dorion","tag-ic-434","tag-messier-42","tag-nebuleuse-de-la-tete-de-cheval"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - 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