{"id":12129,"date":"2025-12-18T08:00:00","date_gmt":"2025-12-18T07:00:00","guid":{"rendered":"https:\/\/www.blog.neoprog.eu\/?p=12129"},"modified":"2025-12-14T14:35:29","modified_gmt":"2025-12-14T13:35:29","slug":"la-galaxie-du-triangle","status":"publish","type":"post","link":"https:\/\/www.blog.neoprog.eu\/index.php\/2025\/12\/18\/la-galaxie-du-triangle\/","title":{"rendered":"La galaxie du Triangle"},"content":{"rendered":"\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"819\" src=\"https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2025\/12\/M-33-Champ-du-Feu.jpg\" alt=\"\" class=\"wp-image-12130\" srcset=\"https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2025\/12\/M-33-Champ-du-Feu.jpg 1024w, https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2025\/12\/M-33-Champ-du-Feu-300x240.jpg 300w, https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2025\/12\/M-33-Champ-du-Feu-768x614.jpg 768w, https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2025\/12\/M-33-Champ-du-Feu-375x300.jpg 375w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">La galaxie du triangle au Champ du Feu<\/figcaption><\/figure>\n\n\n\n<p>Samedi, le brouillard noyait la plaine d\u2019Alsace dans un \u00e9pais coton gris. Quatre cents m\u00e8tres plus haut, le soleil brillait sur les sommets vosgiens, et ce malgr\u00e9 quelques nuages \u00e9lev\u00e9s. <\/p>\n\n\n\n<p>Le chariot, charg\u00e9 de trois mallettes, n\u2019attendait plus que la nuit tombe pour \u00eatre transbord\u00e9 dans le coffre de la voiture. <\/p>\n\n\n\n<p>Bonnet, gants, sous gants, pantalon de ski, anorak, sous v\u00eatements thermiques, semelles chauffantes, bottes, thermos, j\u2019\u00e9tais arm\u00e9 pour les grands froids. <\/p>\n\n\n\n<p>La lune se levait apr\u00e8s minuit ce qui me lassait plusieurs heures pour photographier la galaxie du Triangle, un objet que je n\u2019avais jusqu\u2019ici captur\u00e9 que depuis mon jardin, en plein centre ville. <\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"819\" src=\"https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2025\/12\/M-33-Illkirch.jpg\" alt=\"\" class=\"wp-image-12131\" srcset=\"https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2025\/12\/M-33-Illkirch.jpg 1024w, https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2025\/12\/M-33-Illkirch-300x240.jpg 300w, https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2025\/12\/M-33-Illkirch-768x614.jpg 768w, https:\/\/www.blog.neoprog.eu\/wp-content\/uploads\/2025\/12\/M-33-Illkirch-375x300.jpg 375w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">La galaxie du Triangle au centre ville<\/figcaption><\/figure>\n\n\n\n<p>Nous approchions du maximum des g\u00e9minides et pourtant le parking du Champ du Feu \u00e9tait d\u00e9sert sorti d\u2019Eliott qui avait d\u00e9j\u00e0 install\u00e9 son mat\u00e9riel. Mais qui s\u2019int\u00e9resse aux \u00e9toiles filantes hormis lors des nuits d\u2019\u00e9t\u00e9, lorsque l\u2019on peut les contempler allong\u00e9s en amoureux dans l\u2019herbe ? <\/p>\n\n\n\n<p>J\u2019ai install\u00e9 la lunette \u00e0 c\u00f4t\u00e9 du t\u00e9lescope Newton d\u2019Eliott, et comme cela arrive de plus en plus souvent, toutes les \u00e9tapes de la mise en station se sont d\u00e9roul\u00e9es sans anicroche. <\/p>\n\n\n\n<p>Orientation au nord et mise \u00e0 niveau du tr\u00e9pied, installation de la monture, de la lunette, des r\u00e9sistances chauffantes et des c\u00e2bles, allumage, mise au point sur les \u00e9toiles, alignement sur l\u2019\u00e9toile polaire, ciblage de la galaxie, \u00e9talonnage du guidage, nouvelle mise au point, test de diff\u00e9rents temps de pose et lancement de l\u2019acquisition des images. <\/p>\n\n\n\n<p>\u00c0 21h j\u2019obtenais d\u00e9j\u00e0 mon premier clich\u00e9 de cinq minutes de la galaxie du triangle. Trop facile ! Mais \u00e7a n\u2019a pas toujours \u00e9t\u00e9 le cas. <\/p>\n\n\n\n<p>C\u2019est l\u00e0 qu\u2019une famille est arriv\u00e9e pour assister au magnifique ballet des \u00e9toiles, ce sera la seule de la nuit. Le p\u00e8re viendra nous trouver pour savoir dans quelle direction regarder le spectacle. Oui parce que tant qu\u2019\u00e0 faire une heure de route pour voir les \u00e9toiles filantes, on ne se renseigne pas avant sur ce que l&rsquo;on va regarder.<\/p>\n\n\n\n<p>La famille part rapidement apr\u00e8s un pique-nique dans le noir et le passage de quelques bolides. Eliott, qui cumule des probl\u00e8mes avec sa monture et la collimation de son instrument, jette l\u2019\u00e9ponge, d\u00e9gout\u00e9. Saturne est d\u00e9doubl\u00e9e et floue dans son oculaire et malgr\u00e9 toutes nos tentatives de r\u00e9glages, l\u2019instrument reste myope, sans parler de sa monture EQ4 qui souffre d\u2019un jeu la rendant quasi inutilisable. <\/p>\n\n\n\n<p>C\u2019est ainsi que je me retrouve seul sur l\u2019immense parking d\u00e9sert en compagnie des animaux sauvages, du froid et de ma lunette, sous un magnifique ciel \u00e9toil\u00e9. <\/p>\n\n\n\n<p>La Voie Lact\u00e9e barre d\u2019Est en ouest la vo\u00fbte c\u00e9leste, de la constellation d\u2019Orion jusqu\u2019au Cygne. La galaxie d\u2019Androm\u00e8de est bien visible \u00e0 l\u2019\u0153il nu comme le double amas de Pers\u00e9e, les Pl\u00e9iades, la n\u00e9buleuse d\u2019Orion ainsi que les plan\u00e8tes Saturne et Jupiter. <\/p>\n\n\n\n<p>Pendant que la cam\u00e9ra travaille, je contemple aux jumelles ou \u00e0 l\u2019\u0153il nu le ciel ray\u00e9 de temps \u00e0 autre par une \u00e9toile filante. Le spectacle est juste incroyable ! <\/p>\n\n\n\n<p>Apr\u00e8s avoir accumul\u00e9 trente six images de trois cents secondes unitaires, c\u2019est \u00e0 dire trois heures de photographie, je range le mat\u00e9riel dans le coffre, enl\u00e8ve ma combinaison spatiale et reprend le chemin de la plaine, toujours noy\u00e9e dans le brouillard et le crachin. <\/p>\n\n\n\n<p>Difficile de faire plus triste. J\u2019aurais pu rester et photographier une nouvelle cible mais j\u2019ai perdu l\u2019entra\u00eenement des longues nuits blanches d\u2019\u00e9t\u00e9. Le temps de tout ranger dans la maison, il est d\u00e9j\u00e0 deux heures du matin lorsque je me couche. <\/p>\n\n\n\n<p>\u00c0 peine six heures plus tard, je suis debout devant un caf\u00e9 et le MacBook pour inaugurer son premier traitement photo astro. J\u2019avais bien install\u00e9 Pixinsight (le logiciel de traitement astro) sur la machine toute neuve mais j\u2019avais omis de remonter quelques processus comme RC Astro et le catalogue GA\u00cfA. <\/p>\n\n\n\n<p>Une heure plus tard, je peux enfin lancer l\u2019empilement des photos et traiter l\u2019image brute. La galaxie du Triangle se d\u00e9voile enfin, infiniment plus riche en d\u00e9tails que lorsque je l\u2019avais photographi\u00e9e en ville (merci \u00e0 la pollution lumineuse), ses bras spiral\u00e9s, ses \u00e9toiles mouchet\u00e9es, une cr\u00e8me fouett\u00e9e comme dirait Gribouille, notre astro-dessinateur officiel de l\u2019association. <\/p>\n\n\n\n<p>Il est midi pass\u00e9 lorsque ma photographie commence \u00e0 prendre forme. Il m\u2019aura fallu pas loin de sept heures pour capturer les images (route et r\u00e9glages compris) et trois heures pour les d\u00e9velopper. Tout \u00e7a pour une photographie de galaxie que j\u2019avais d\u00e9j\u00e0 r\u00e9alis\u00e9e depuis mon jardin et captur\u00e9e des milliers de fois par d\u2019autres passionn\u00e9s. <\/p>\n\n\n\n<p>Le jeu en vaut-il la chandelle ? Pour moi, oui assur\u00e9ment ! Ce fut une nuit magique.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Samedi, le brouillard noyait la plaine d\u2019Alsace dans un \u00e9pais coton gris. Quatre cents m\u00e8tres plus haut, le soleil brillait sur les sommets vosgiens, et ce malgr\u00e9 quelques nuages \u00e9lev\u00e9s. Le chariot, charg\u00e9 de trois mallettes, n\u2019attendait plus que la &hellip; <a href=\"https:\/\/www.blog.neoprog.eu\/index.php\/2025\/12\/18\/la-galaxie-du-triangle\/\">Continuer la lecture <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"image","meta":{"footnotes":""},"categories":[2810,7],"tags":[185,3697,2906,3701,3698,3699],"class_list":["post-12129","post","type-post","status-publish","format-image","hentry","category-astro","category-photo","tag-astronomie","tag-brouillard","tag-champ-du-feu","tag-constellation-du-triangle","tag-galaxie","tag-messier-33","post_format-post-format-image"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>La galaxie du Triangle - Le Blog du N\u00e9oprog<\/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:\/\/www.blog.neoprog.eu\/index.php\/2025\/12\/18\/la-galaxie-du-triangle\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"La galaxie du Triangle - Le Blog du N\u00e9oprog\" \/>\n<meta property=\"og:description\" content=\"Samedi, le brouillard noyait la plaine d\u2019Alsace dans un \u00e9pais coton gris. Quatre cents m\u00e8tres plus haut, le soleil brillait sur les sommets vosgiens, et ce malgr\u00e9 quelques nuages \u00e9lev\u00e9s. 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