{"id":10265,"date":"2021-09-17T16:18:32","date_gmt":"2021-09-17T16:18:32","guid":{"rendered":"https:\/\/groupeastronomiespa.be\/astrogas\/nebuleuse-du-sorcier\/"},"modified":"2025-06-08T22:44:27","modified_gmt":"2025-06-08T20:44:27","slug":"nebuleuse-du-sorcier","status":"publish","type":"post","link":"https:\/\/groupeastronomiespa.be\/astrogas\/nebuleuse-du-sorcier\/","title":{"rendered":"N\u00e9buleuse du Sorcier"},"content":{"rendered":"

Apr\u00e8s La n\u00e9buleuse de la T\u00eate de Poisson, voici celle du Sorcier (NGC 7380).<\/p>\n

C\u2019est une n\u00e9buleuse \u00e0 \u00e9mission associ\u00e9e \u00e0 un amas ouvert situ\u00e9 \u00e0 environ 7000 \u00e0 8000 ann\u00e9es lumi\u00e8re, dans la constellation de C\u00e9ph\u00e9e.
\nD\u2019apr\u00e8s la litt\u00e9rature, il s\u2019agit d\u2019un grand nuage de gaz, essentiellement\u00a0compos\u00e9 d\u2019hydrog\u00e8ne,\u00a0au sein duquel se forme de nouvelles \u00e9toiles, et qui se trouve ionis\u00e9 par le rayonnement de ces derni\u00e8res. Le nuage s\u2019\u00e9tend sur une centaine d\u2019ann\u00e9es-lumi\u00e8re de longueur, et n\u2019a pas une densit\u00e9 homog\u00e8ne : en certains endroits, la concentration de gaz est plus importante, et peut conduire \u00e0 un effondrement gravitationnel qui s\u2019amplifie avec le temps jusqu\u2019\u00e0 la cr\u00e9ation d\u2019une ou plusieurs \u00e9toiles. <\/p>\n

Image prise en S-H-O, en juin de cette ann\u00e9e sur plusieurs sessions. Des poses de 180 sec et de 300 sec selon la qualit\u00e9 du ciel et de la lune. Soit environ 6h30 au total.
\nPas eu facile \u00e0 traiter cette n\u00e9buleuse, du au grand nombre d\u2019\u00e9toiles je crois. StarNet n\u2019est pas top dans ce cas-ci pour traiter le nuage. Il laisse des \u00ab\u00a0trous d\u2019\u00e9toiles\u00a0\u00bb dans la n\u00e9buleuse…
\nJe me suis plut\u00f4t concentr\u00e9 \u00e0 faire ressortir le contraste entre les couches. Sachant que tout le fond de ciel est rempli d\u2019une n\u00e9bulosit\u00e9.
\nC\u2019est pas vraiment Top. Mon fond d\u2019image manque un peu de \u00ab\u00a0lissage de couleur\u00a0\u00bb\u2026
\n\"\"<\/a>
\nN\u00e9anmoins je suis satisfait de ce premier essais sur cet objet.<\/p>\n

Richard Hendrick<\/p>\n\n\n

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\n Veuillez voter<\/span>\n <\/div>\n <\/div>\n","protected":false},"excerpt":{"rendered":"

Apr\u00e8s La n\u00e9buleuse de la T\u00eate de Poisson, voici celle du Sorcier (NGC 7380). C\u2019est une n\u00e9buleuse \u00e0 \u00e9mission associ\u00e9e \u00e0 un amas ouvert situ\u00e9 \u00e0 environ 7000 \u00e0 8000 ann\u00e9es lumi\u00e8re, dans la constellation de C\u00e9ph\u00e9e. D\u2019apr\u00e8s la litt\u00e9rature, il s\u2019agit d\u2019un grand nuage de gaz, essentiellement\u00a0compos\u00e9 d\u2019hydrog\u00e8ne,\u00a0au sein duquel se forme de nouvelles […]<\/p>\n","protected":false},"author":11,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[2],"tags":[],"class_list":["post-10265","post","type-post","status-publish","format-standard","hentry","category-astrophotos"],"_links":{"self":[{"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/posts\/10265","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/users\/11"}],"replies":[{"embeddable":true,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/comments?post=10265"}],"version-history":[{"count":1,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/posts\/10265\/revisions"}],"predecessor-version":[{"id":11412,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/posts\/10265\/revisions\/11412"}],"wp:attachment":[{"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/media?parent=10265"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/categories?post=10265"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/tags?post=10265"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}