{"id":2124,"date":"2015-03-25T06:14:00","date_gmt":"2015-03-25T06:14:00","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=2124"},"modified":"2015-03-31T04:56:55","modified_gmt":"2015-03-31T04:56:55","slug":"la-comete-lovejoy-et-la-nebuleuse-planetaire-sh2-188","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/03\/25\/la-comete-lovejoy-et-la-nebuleuse-planetaire-sh2-188\/","title":{"rendered":"La com\u00e8te Lovejoy et la n\u00e9buleuse plan\u00e9taire SH2-188"},"content":{"rendered":"<p>Apr\u00e8s son passage au p\u00e9rih\u00e9lie le 30 janvier dernier, la com\u00e8te <a title=\"Une image \u00e9poustouflante de la com\u00e8te C\/2014 Q2 Lovejoy\" href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/03\/04\/une-image-epoustouflante-de-la-comete-c2014-q2-lovejoy\/\" target=\"_blank\">C\/2014 Q2 Lovejoy<\/a> s&#8217;\u00e9loigne progressivement de nous et perd lentement de son \u00e9clat. Elle n&#8217;en reste pas moins une cible de choix pour les astrophotographes de l&#8217;h\u00e9misph\u00e8re nord bien \u00e9quip\u00e9s.<\/p>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/03\/comet.jpg\" rel=\"lightbox[2124]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-2125\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/03\/comet-450x292.jpg\" alt=\"comet\" width=\"450\" height=\"292\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/03\/comet-450x292.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/03\/comet-1024x665.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/03\/comet.jpg 1300w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<p>En t\u00e9moigne cette image r\u00e9alis\u00e9e le 10 mars par l&#8217;astrophotographe autrichien <a title=\"Michael J\u00e4ger\" href=\"http:\/\/cometpieces-at.webnode.at\/\" target=\"_blank\">Michael J\u00e4ger<\/a>, alors que la com\u00e8te passait \u00e0 proximit\u00e9 de la n\u00e9buleuse SH2-188.<\/p>\n<p><!--more-->Situ\u00e9e dans la <a title=\"La constellation de Cassiop\u00e9e\" href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2014\/09\/25\/constellation-cassiopee\/\" target=\"_blank\">constellation de Cassiop\u00e9e<\/a>, SH2-188 est r\u00e9f\u00e9renc\u00e9e dans le catalogue de l&#8217;astronome am\u00e9ricain Stewart Sharpless qui publia en 1959 la liste de 313 n\u00e9buleuses en \u00e9mission. En raison de sa forme asym\u00e9trique les <a title=\"Lumi\u00e8re rouge pour les astronomes\" href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2014\/12\/14\/lumiere-rouge-les-astronomes\/\" target=\"_blank\">astronomes <\/a>ont pens\u00e9 dans un premier temps qu&#8217;il s&#8217;agissait des restes d&#8217;une supernova. Mais la mesure de l&#8217;abondance de carbone, d&#8217;azote et d&#8217;oxyg\u00e8ne dans son enveloppe externe a confirm\u00e9 son statut de <a title=\"D\u00e9finition d'une n\u00e9buleuse plan\u00e9taire\" href=\"http:\/\/www.futura-sciences.com\/magazines\/espace\/infos\/dico\/d\/univers-nebuleuse-planetaire-51\/\" target=\"_blank\">n\u00e9buleuse plan\u00e9taire<\/a>.<\/p>\n<p>Les n\u00e9buleuses plan\u00e9taires sont des nuages de gaz \u00e9ject\u00e9s par des <a title=\"En vid\u00e9o : le Kilimanjaro sous les \u00e9toiles\" href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/02\/13\/en-video-le-kilimanjaro-sous-les-etoiles\/\" target=\"_blank\">\u00e9toiles <\/a>mourantes\u00a0; la plupart ont une coque gazeuse sym\u00e9trique en expansion centr\u00e9e sur l&#8217;\u00e9toile moribonde, ce qui leur donnait un faux aspect plan\u00e9taire dans les premiers <a title=\"En images : les t\u00e9lescopes des amateurs\" href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2014\/05\/14\/en-images-les-telescopes-amateurs\/\" target=\"_blank\">t\u00e9lescopes <\/a>des astronomes, d&#8217;o\u00f9 leur nom. Pourquoi SH2-188 \u00e9chappe-t-elle \u00e0 cette sym\u00e9trie\u00a0? Sans doute en raison du mouvement rapide de la n\u00e9buleuse dans le milieu interstellaire\u00a0: il se forme une onde de choc \u00e0 l&#8217;avant de la n\u00e9buleuse, mat\u00e9rialis\u00e9e par un croissant gazeux lumineux.<\/p>\n<p>Une image tr\u00e8s d\u00e9taill\u00e9e de la n\u00e9buleuse SH2-188 a \u00e9t\u00e9 r\u00e9alis\u00e9e par le t\u00e9lescope de 4 m\u00e8tres de diam\u00e8tre <a title=\"Sharpless 2-188 (Sh2-188)\" href=\"http:\/\/www.noao.edu\/image_gallery\/html\/im1065.html\" target=\"_blank\"><em>Kitt Peak National Observatory<\/em><\/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>Apr\u00e8s son passage au p\u00e9rih\u00e9lie le 30 janvier dernier, la com\u00e8te C\/2014 Q2 Lovejoy s&#8217;\u00e9loigne progressivement de nous et perd lentement de son \u00e9clat. Elle n&#8217;en reste pas moins une cible de choix pour les astrophotographes de l&#8217;h\u00e9misph\u00e8re nord bien \u00e9quip\u00e9s. En t\u00e9moigne cette image r\u00e9alis\u00e9e le 10 mars par l&#8217;astrophotographe autrichien Michael J\u00e4ger, alors &hellip; <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/03\/25\/la-comete-lovejoy-et-la-nebuleuse-planetaire-sh2-188\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">La com\u00e8te Lovejoy et la n\u00e9buleuse plan\u00e9taire SH2-188<\/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":2125,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[509],"tags":[94,276,701,401,89,895,896,897,96],"class_list":["post-2124","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites","tag-astronome","tag-astrophotographe","tag-comete-c2014-q2-lovejoy","tag-constellation-de-cassiopee","tag-etoile","tag-michael-jager","tag-nebuleuse-planetaire","tag-stewart-sharpless","tag-telescope"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>La com\u00e8te Lovejoy et la n\u00e9buleuse plan\u00e9taire SH2-188<\/title>\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\/2015\/03\/25\/la-comete-lovejoy-et-la-nebuleuse-planetaire-sh2-188\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"La com\u00e8te Lovejoy et la n\u00e9buleuse plan\u00e9taire SH2-188\" \/>\n<meta property=\"og:description\" content=\"Apr\u00e8s son passage au p\u00e9rih\u00e9lie le 30 janvier dernier, la com\u00e8te C\/2014 Q2 Lovejoy s&#8217;\u00e9loigne progressivement de nous et perd lentement de son \u00e9clat. Elle n&#8217;en reste pas moins une cible de choix pour les astrophotographes de l&#8217;h\u00e9misph\u00e8re nord bien \u00e9quip\u00e9s. En t\u00e9moigne cette image r\u00e9alis\u00e9e le 10 mars par l&#8217;astrophotographe autrichien Michael J\u00e4ger, alors &hellip; Continuer la lecture de La com\u00e8te Lovejoy et la n\u00e9buleuse plan\u00e9taire SH2-188 &rarr;\" \/>\n<meta property=\"og:url\" content=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/03\/25\/la-comete-lovejoy-et-la-nebuleuse-planetaire-sh2-188\/\" \/>\n<meta property=\"og:site_name\" content=\"CIELMANIA : le blog de Jean-Baptiste FELDMANN, photographe du ciel\" \/>\n<meta property=\"article:published_time\" content=\"2015-03-25T06:14:00+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2015-03-31T04:56:55+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/03\/comet.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1300\" \/>\n\t<meta property=\"og:image:height\" content=\"845\" \/>\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=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/03\/25\/la-comete-lovejoy-et-la-nebuleuse-planetaire-sh2-188\/\",\"url\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/03\/25\/la-comete-lovejoy-et-la-nebuleuse-planetaire-sh2-188\/\",\"name\":\"La com\u00e8te Lovejoy et la n\u00e9buleuse plan\u00e9taire SH2-188\",\"isPartOf\":{\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/03\/25\/la-comete-lovejoy-et-la-nebuleuse-planetaire-sh2-188\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/03\/25\/la-comete-lovejoy-et-la-nebuleuse-planetaire-sh2-188\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/03\/comet.jpg\",\"datePublished\":\"2015-03-25T06:14:00+00:00\",\"dateModified\":\"2015-03-31T04:56:55+00:00\",\"author\":{\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/#\/schema\/person\/62b391b709c307783237b759b62731ea\"},\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/03\/25\/la-comete-lovejoy-et-la-nebuleuse-planetaire-sh2-188\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"fr-FR\",\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/03\/25\/la-comete-lovejoy-et-la-nebuleuse-planetaire-sh2-188\/#primaryimage\",\"url\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/03\/comet.jpg\",\"contentUrl\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/03\/comet.jpg\",\"width\":1300,\"height\":845},{\"@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. 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