{"id":619,"date":"2018-08-06T23:01:55","date_gmt":"2018-08-06T21:01:55","guid":{"rendered":"http:\/\/www.arnaudom.fr\/wordpress\/?page_id=619"},"modified":"2021-02-12T08:13:16","modified_gmt":"2021-02-12T07:13:16","slug":"pour-les-debutants","status":"publish","type":"page","link":"https:\/\/www.arnaudom.fr\/wordpress\/pour-les-debutants\/","title":{"rendered":"Pour les d\u00e9butants"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"619\" class=\"elementor elementor-619\">\n\t\t\t\t\t\t<div class=\"elementor-inner\">\n\t\t\t\t<div class=\"elementor-section-wrap\">\n\t\t\t\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-e902ce8 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"e902ce8\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t\t\t<div class=\"elementor-row\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-817f38f\" data-id=\"817f38f\" data-element_type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t<div class=\"elementor-column-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-db9646a elementor-widget elementor-widget-heading\" data-id=\"db9646a\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h1 class=\"elementor-heading-title elementor-size-default\">Introduction \u00e0 l'astronomie pour les d\u00e9butants<\/h1>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e6ce9b8 elementor-widget elementor-widget-text-editor\" data-id=\"e6ce9b8\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-text-editor elementor-clearfix\">\n\t\t\t\t<p><span style=\"color: #000000;\">La premi\u00e8re question que je me suis pos\u00e9e en tant que d\u00e9butant, c&rsquo;\u00e9tait :<\/span><\/p><p class=\"col5 gras\"><strong><span style=\"color: #0000ff;\">&#8211; mais que voit-on r\u00e9ellement dans un t\u00e9lescope ?<\/span><\/strong><\/p><p><span style=\"color: #000000;\">Il faut en effet savoir que la plupart des photos que l&rsquo;on trouve dans les magazines ne refl\u00e8tent pas du tout ce qu&rsquo;on peut voir r\u00e9ellement dans un t\u00e9l\u00e9scope, et en particulier dans un petit t\u00e9lescope comme le 130\/900. Deux raisons \u00e0 cela :<\/span><\/p><p><span style=\"color: #000000;\">&#8211; l&rsquo;oeil ne per\u00e7oit pas les couleurs sur des objets tr\u00e8s peu lumineux, mais seulement diff\u00e9rentes nuances de gris. Inversement les pellicules photos ou les capteurs \u00e9lectroniques sont beaucoup plus sensibles et montrent les couleurs r\u00e9elles des objets, en particulier les teintes rouges, couleur qui appara\u00eet sur de nombreuses photos de n\u00e9buleuses par exemple. En astronomie on ne voit donc pratiquement jamais de couleur, \u00e0 quelques exceptions pr\u00e8s &#8230; (lire ci-dessous).<\/span><\/p><p><span style=\"color: #000000;\">&#8211; les d\u00e9tails que l&rsquo;on peut percevoir d\u00e9pendent du diam\u00e8tre du t\u00e9l\u00e9scope. Le diam\u00e8tre du 130\/900 n&rsquo;est pas suffisant pour voir des d\u00e9tails sur des objets tr\u00e8s peu lumineux, comme les galaxies, sur lesquelles il est par exemple impossible de distinguer les bras spiraux.<\/span><\/p><p><span style=\"color: #000000;\">Cela \u00e9tant dit, bien que cela puisse sembler d\u00e9cevant au premier abord, observer directement des objets aussi lointains procure une \u00e9motion que ne peut remplacer une photographie ! Certains astronomes amateurs ne jurent d&rsquo;ailleurs que par l&rsquo;observation visuelle !<\/span><\/p><p class=\"col5 gras\"><strong><span style=\"color: #0000ff;\">&#8211; dans quels cas voit-on des couleurs ?<\/span><\/strong><\/p><p><span style=\"color: #000000;\">On verra tout de m\u00eame des couleurs en observant des objets suffisamment lumineux comme :<\/span><\/p><p><span style=\"color: #000000;\">&#8211; les plan\u00e8tes : Saturne et Jupiter montrent diff\u00e9rents contrastes de couleur (notamment les bandes \u00e9quatoriales de Jupiter), Mars est nettement orang\u00e9e et V\u00e9nus blanche ou jaune.<\/span><\/p><p><span style=\"color: #000000;\">&#8211; les \u00e9toiles brillantes : sur les plus brillantes, on distingue m\u00eame leur couleur \u00e0 l&rsquo;oeil nu. B\u00e9telgeuse d&rsquo;Orion et Antar\u00e8s du Scorpion sont rougeoyantes, Sirius du Grand Chien ou Rigel d&rsquo;Orion sont blanche-bleu, Capella du Cocher ou Acturus du Bouvier sont d&rsquo;un jaune magnifique et Ald\u00e9baran du Taureau est orang\u00e9e.<\/span><\/p><p><span style=\"color: #000000;\">&#8211; les \u00e9toiles doubles : certaines \u00e9toiles doubles brillantes montrent deux \u00e9toiles de couleur diff\u00e9rente. La plus c\u00e9l\u00e8bre est Albir\u00e9o du Cygne, qui montre une \u00e9toile jaune-orange accompagn\u00e9e d&rsquo;une plus petite bleue, c&rsquo;est superbe. J&rsquo;aime bien aussi Gamma d&rsquo;Androm\u00e8de, qui lui ressemble beaucoup.<\/span><\/p><p><span style=\"color: #000000;\">&#8211; M42, la grande n\u00e9buleuse d&rsquo;Orion : c&rsquo;est la seule n\u00e9buleuse du ciel suffisamment grande et lumineuse (elle peut se voir \u00e0 l&rsquo;oeil nu) pour pr\u00e9senter quelques teintes color\u00e9es. Je la vois grise tirant un peu sur le bleu, plusieurs de mes camarades de club la voit plut\u00f4t verte&#8230;<\/span><\/p>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-296ba3a elementor-widget elementor-widget-heading\" data-id=\"296ba3a\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Comparaison de quelques photos avec ce qu'on peut voir au 130\/900 :<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-4f0b3fc elementor-section-full_width elementor-section-height-default elementor-section-height-default\" data-id=\"4f0b3fc\" data-element_type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t\t\t<div class=\"elementor-row\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-590bdd1\" data-id=\"590bdd1\" data-element_type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t<div class=\"elementor-column-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-dd413b9 elementor-widget elementor-widget-text-editor\" data-id=\"dd413b9\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-text-editor elementor-clearfix\">\n\t\t\t\t<p style=\"text-align: center;\"><span style=\"color: #ffcc00;\"><strong><span class=\"col6 gras\">Photos<\/span><\/strong><\/span><\/p>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4748543 elementor-widget elementor-widget-image\" data-id=\"4748543\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-image\">\n\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"146\" height=\"209\" src=\"https:\/\/www.arnaudom.fr\/wordpress\/wp-content\/uploads\/2018\/08\/Lunei1.jpg\" class=\"attachment-large size-large wp-image-706\" alt=\"\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-1d47b29\" data-id=\"1d47b29\" data-element_type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t<div class=\"elementor-column-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-cc2781d elementor-widget elementor-widget-text-editor\" data-id=\"cc2781d\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-text-editor elementor-clearfix\">\n\t\t\t\t<p style=\"text-align: center;\"><span class=\"col6 gras\" style=\"color: #ffcc00;\"><strong>Ce qu&rsquo;on voit r\u00e9ellement au 130\/900<\/strong> <\/span><\/p>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ff1c95b elementor-widget elementor-widget-image\" data-id=\"ff1c95b\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-image\">\n\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"146\" height=\"209\" src=\"https:\/\/www.arnaudom.fr\/wordpress\/wp-content\/uploads\/2018\/08\/Lunei1.jpg\" class=\"attachment-large size-large wp-image-706\" alt=\"\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-85ae533 elementor-section-content-middle elementor-section-full_width elementor-section-height-default elementor-section-height-default\" data-id=\"85ae533\" data-element_type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t\t\t<div class=\"elementor-row\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-91b8117\" data-id=\"91b8117\" data-element_type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t<div class=\"elementor-column-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-6eb649c elementor-widget elementor-widget-text-editor\" data-id=\"6eb649c\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-text-editor elementor-clearfix\">\n\t\t\t\t<p><span style=\"color: #000000;\">La Lune est vraiment superbe au t\u00e9l\u00e9scope, il n&rsquo;y a pas vraiment de diff\u00e9rence entre ce qu&rsquo;on peut voir en photo et ce qu&rsquo;on voit au 130\/900 quand on la regarde dans sa globalit\u00e9.<\/span><\/p>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-d2a2f36 elementor-section-full_width elementor-section-height-default elementor-section-height-default\" data-id=\"d2a2f36\" data-element_type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t\t\t<div class=\"elementor-row\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-15a8a4e\" data-id=\"15a8a4e\" data-element_type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t<div class=\"elementor-column-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-5d1b86c elementor-widget elementor-widget-image\" data-id=\"5d1b86c\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-image\">\n\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"193\" height=\"142\" src=\"https:\/\/www.arnaudom.fr\/wordpress\/wp-content\/uploads\/2018\/08\/Lunei2.jpg\" class=\"attachment-large size-large wp-image-722\" alt=\"\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-76bf146\" data-id=\"76bf146\" data-element_type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t<div class=\"elementor-column-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-7a0de10 elementor-widget elementor-widget-image\" data-id=\"7a0de10\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-image\">\n\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"193\" height=\"142\" src=\"https:\/\/www.arnaudom.fr\/wordpress\/wp-content\/uploads\/2018\/08\/Lunei2.jpg\" class=\"attachment-large size-large wp-image-722\" alt=\"\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-068d0ba elementor-section-content-middle elementor-section-full_width elementor-section-height-default elementor-section-height-default\" data-id=\"068d0ba\" data-element_type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t\t\t<div class=\"elementor-row\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-28fc550\" data-id=\"28fc550\" data-element_type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t<div class=\"elementor-column-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-2df145c elementor-widget elementor-widget-text-editor\" data-id=\"2df145c\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-text-editor elementor-clearfix\">\n\t\t\t\t<p><span style=\"color: #000000;\">De m\u00eame, on peut facilement observer le d\u00e9tail des crat\u00e8res lunaires, et l\u00e0 aussi on pourra voir les m\u00eames d\u00e9tails qu&rsquo;en photo. Seul b\u00e9mol, il faut cependant que la turbulence soit faible car grossir la surface lunaire revient aussi \u00e0 grossir la turbulence. <\/span><\/p>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-326eecc elementor-section-full_width elementor-section-height-default elementor-section-height-default\" data-id=\"326eecc\" data-element_type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t\t\t<div class=\"elementor-row\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-fa18dda\" data-id=\"fa18dda\" data-element_type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t<div class=\"elementor-column-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-65827ae elementor-widget elementor-widget-image\" data-id=\"65827ae\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-image\">\n\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"220\" height=\"157\" src=\"https:\/\/www.arnaudom.fr\/wordpress\/wp-content\/uploads\/2018\/08\/Sati1.jpg\" class=\"attachment-large size-large wp-image-726\" alt=\"\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-bbfbe11\" data-id=\"bbfbe11\" data-element_type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t<div class=\"elementor-column-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-e8b5e41 elementor-widget elementor-widget-image\" data-id=\"e8b5e41\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-image\">\n\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"117\" height=\"91\" src=\"https:\/\/www.arnaudom.fr\/wordpress\/wp-content\/uploads\/2018\/08\/Sati2.jpg\" class=\"attachment-large size-large wp-image-727\" alt=\"\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-f6a0feb elementor-section-content-middle elementor-section-full_width elementor-section-height-default elementor-section-height-default\" data-id=\"f6a0feb\" data-element_type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t\t\t<div class=\"elementor-row\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-0751eb9\" data-id=\"0751eb9\" data-element_type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t<div class=\"elementor-column-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-6a1b4c5 elementor-widget elementor-widget-text-editor\" data-id=\"6a1b4c5\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-text-editor elementor-clearfix\">\n\t\t\t\t<p><span style=\"color: #000000;\">En photo Saturne pr\u00e9sente beaucoup de nuances de couleurs, notamment entre le globe et les anneaux, et on voit nettement la s\u00e9paration entre les anneaux (la division de Cassini). Au t\u00e9l\u00e9scope elle appara\u00eet de prime abord petite et jaune, les anneaux sont bien visibles. On peut arriver \u00e0 percevoir la division de Cassini, des nuances de couleur sur les anneaux et le globe, et l&rsquo;ombre de la plan\u00e8te sur les anneaux. <\/span><\/p>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-82bbab8 elementor-section-full_width elementor-section-height-default elementor-section-height-default\" data-id=\"82bbab8\" data-element_type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t\t\t<div class=\"elementor-row\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-dbff259\" data-id=\"dbff259\" data-element_type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t<div class=\"elementor-column-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-19db199 elementor-widget elementor-widget-image\" data-id=\"19db199\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-image\">\n\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"250\" height=\"182\" src=\"https:\/\/www.arnaudom.fr\/wordpress\/wp-content\/uploads\/2018\/08\/M31i1.jpg\" class=\"attachment-large size-large wp-image-732\" alt=\"\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-842cc2b\" data-id=\"842cc2b\" data-element_type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t<div class=\"elementor-column-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-968a733 elementor-widget elementor-widget-image\" data-id=\"968a733\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-image\">\n\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"250\" height=\"187\" src=\"https:\/\/www.arnaudom.fr\/wordpress\/wp-content\/uploads\/2018\/08\/M31i2.jpg\" class=\"attachment-large size-large wp-image-733\" alt=\"\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-a4d3f93 elementor-section-content-middle elementor-section-full_width elementor-section-height-default elementor-section-height-default\" data-id=\"a4d3f93\" data-element_type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t\t\t<div class=\"elementor-row\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-b3acf6a\" data-id=\"b3acf6a\" data-element_type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t<div class=\"elementor-column-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-6bc8f4c elementor-widget elementor-widget-text-editor\" data-id=\"6bc8f4c\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-text-editor elementor-clearfix\">\n\t\t\t\t<p><span style=\"color: #000000;\">La galaxie d&rsquo;Androm\u00e8de est magnifique en photo, avec de nombreuses couleurs et \u00e9norm\u00e9ment de d\u00e9tails visibles. Visuellement, on voit une grande nu\u00e9e grise, dont le centre est tr\u00e8s lumineux, mais il est difficile d&rsquo;y percevoir d&rsquo;autres d\u00e9tails. De plus l&rsquo;image n\u00e9cessite un bon ciel pour tenter de voir toute l&rsquo;\u00e9tendue de cette grande galaxie. On peut voir cependant sans probl\u00e8me ses deux petites galaxies satellites, M32 et M110, et la diff\u00e9rence dans leur forme et leur luminosit\u00e9. <\/span><\/p>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-09015f8 elementor-section-full_width elementor-section-height-default elementor-section-height-default\" data-id=\"09015f8\" data-element_type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t\t\t<div class=\"elementor-row\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-cea75a1\" data-id=\"cea75a1\" data-element_type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t<div class=\"elementor-column-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-fbc466a elementor-widget elementor-widget-image\" data-id=\"fbc466a\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-image\">\n\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"250\" height=\"187\" src=\"https:\/\/www.arnaudom.fr\/wordpress\/wp-content\/uploads\/2018\/08\/M42i1.jpg\" class=\"attachment-large size-large wp-image-734\" alt=\"\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-2496f85\" data-id=\"2496f85\" data-element_type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t<div class=\"elementor-column-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-7afe7d9 elementor-widget elementor-widget-image\" data-id=\"7afe7d9\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-image\">\n\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"250\" height=\"208\" src=\"https:\/\/www.arnaudom.fr\/wordpress\/wp-content\/uploads\/2018\/08\/m42i2.jpg\" class=\"attachment-large size-large wp-image-735\" alt=\"\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-33300bd elementor-section-content-middle elementor-section-full_width elementor-section-height-default elementor-section-height-default\" data-id=\"33300bd\" data-element_type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t\t\t<div class=\"elementor-row\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-9ed1208\" data-id=\"9ed1208\" data-element_type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t<div class=\"elementor-column-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-7e11cc7 elementor-widget elementor-widget-text-editor\" data-id=\"7e11cc7\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-text-editor elementor-clearfix\">\n\t\t\t\t<p><span style=\"color: #000000;\">La grande n\u00e9buleuse d&rsquo;Orion pr\u00e9sente sur les photos de magnifiques couleurs dans les tons rouge et violet. La n\u00e9buleuse s&rsquo;\u00e9tale, et pr\u00e9sente de longues extensions magnifiques. En visuel elle est magnifique mais pr\u00e9sente une teinte grise, qu&rsquo;on peut voir un peu bleue\/verte vers le centre. Elle ressemble plus \u00e0 deux grandes ailes avec des \u00e9toiles au centre, et elle est moins \u00e9tendue que sur les photos. <\/span><\/p>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-1b963f2 elementor-section-full_width elementor-section-height-default elementor-section-height-default\" data-id=\"1b963f2\" data-element_type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t\t\t<div class=\"elementor-row\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-0c7ac06\" data-id=\"0c7ac06\" data-element_type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t<div class=\"elementor-column-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-4630837 elementor-widget elementor-widget-image\" data-id=\"4630837\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-image\">\n\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"250\" height=\"208\" src=\"https:\/\/www.arnaudom.fr\/wordpress\/wp-content\/uploads\/2018\/08\/m51i1.jpg\" class=\"attachment-large size-large wp-image-736\" alt=\"\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-8b773e9\" data-id=\"8b773e9\" data-element_type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t<div class=\"elementor-column-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-7e39960 elementor-widget elementor-widget-image\" data-id=\"7e39960\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-image\">\n\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"250\" height=\"208\" src=\"https:\/\/www.arnaudom.fr\/wordpress\/wp-content\/uploads\/2018\/08\/m51i2.jpg\" class=\"attachment-large size-large wp-image-737\" alt=\"\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-3ba74fe elementor-section-content-middle elementor-section-full_width elementor-section-height-default elementor-section-height-default\" data-id=\"3ba74fe\" data-element_type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t\t\t<div class=\"elementor-row\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-c003a66\" data-id=\"c003a66\" data-element_type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t<div class=\"elementor-column-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-0f8f50e elementor-widget elementor-widget-text-editor\" data-id=\"0f8f50e\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-text-editor elementor-clearfix\">\n\t\t\t\t<p><span style=\"color: #000000;\">M51 est une magnifique galaxie spirale, appel\u00e9e aussi la galaxie du tourbillon, dont l&rsquo;un des bras est reli\u00e9 \u00e0 une seconde galaxie plus petite. Ses photos sont superbes ! Au t\u00e9l\u00e9scope, on ne voit pas du tout ses bras spiraux, ni de d\u00e9tails pr\u00e9cis. La galaxie a plus l&rsquo;aspect d&rsquo;une \u00ab\u00a0poire\u00a0\u00bb, sur laquelle on peut distinguer les coeurs des deux galaxies comme deux t\u00e2ches brillantes. Elle n\u00e9cessite un ciel correct. Il faut au moins 250 mm de diam\u00e8tre pour percevoir ses bras spiraux. <\/span><\/p>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Introduction \u00e0 l&rsquo;astronomie pour les d\u00e9butants La premi\u00e8re question que je me suis pos\u00e9e en tant que d\u00e9butant, c&rsquo;\u00e9tait : &#8211; mais que voit-on r\u00e9ellement dans un t\u00e9lescope ? Il faut en effet savoir que la plupart des photos que l&rsquo;on trouve dans les magazines ne refl\u00e8tent pas du tout ce qu&rsquo;on peut voir r\u00e9ellement &hellip;<\/p>\n<p class=\"read-more\"> <a class=\"\" href=\"https:\/\/www.arnaudom.fr\/wordpress\/pour-les-debutants\/\"> <span class=\"screen-reader-text\">Pour les d\u00e9butants<\/span> Lire la suite\u00a0\u00bb<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"site-sidebar-layout":"default","site-content-layout":"default","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"disabled","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"footnotes":""},"class_list":["post-619","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.arnaudom.fr\/wordpress\/wp-json\/wp\/v2\/pages\/619","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.arnaudom.fr\/wordpress\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.arnaudom.fr\/wordpress\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.arnaudom.fr\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.arnaudom.fr\/wordpress\/wp-json\/wp\/v2\/comments?post=619"}],"version-history":[{"count":26,"href":"https:\/\/www.arnaudom.fr\/wordpress\/wp-json\/wp\/v2\/pages\/619\/revisions"}],"predecessor-version":[{"id":6543,"href":"https:\/\/www.arnaudom.fr\/wordpress\/wp-json\/wp\/v2\/pages\/619\/revisions\/6543"}],"wp:attachment":[{"href":"https:\/\/www.arnaudom.fr\/wordpress\/wp-json\/wp\/v2\/media?parent=619"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}