{"id":275,"date":"2024-12-17T10:12:10","date_gmt":"2024-12-17T09:12:10","guid":{"rendered":"https:\/\/www.stelvision.com\/astro\/?page_id=275"},"modified":"2026-05-12T09:44:50","modified_gmt":"2026-05-12T07:44:50","slug":"le-x-lunaire","status":"publish","type":"post","link":"https:\/\/www.stelvision.com\/astro\/le-x-lunaire\/","title":{"rendered":"Le X lunaire"},"content":{"rendered":"\n<p class=\"chapo wp-block-paragraph\">La Lune, cible attrayante et facile pour tous les observateurs, rec\u00e8le quelques observations originales dont le X&nbsp;lunaire fait partie. Mais attention, car son apparition est\u2026 fugace&nbsp;!<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img decoding=\"async\" width=\"864\" height=\"800\" src=\"https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/02\/01.jpg\" alt=\"\" class=\"wp-image-276\" srcset=\"https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/02\/01.jpg 864w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/02\/01-300x278.jpg 300w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/02\/01-768x711.jpg 768w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/02\/01-750x694.jpg 750w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/02\/01-570x528.jpg 570w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/02\/01-368x341.jpg 368w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/02\/01-270x250.jpg 270w\" sizes=\"(max-width: 864px) 100vw, 864px\" \/><figcaption class=\"wp-element-caption\"><strong>Le X lunaire appara\u00eet le long du terminateur un peu avant le premier quartier de Lune.<\/strong> <small>Image\u00a0: Daniel Henrion <\/small><\/figcaption><\/figure>\n<\/div>\n\n\n<p class=\"wp-block-paragraph\">Le X&nbsp;lunaire n\u2019est pas une formation g\u00e9ologique comme le sont les failles, les crat\u00e8res ou les mers. Il s\u2019agit d\u2019un jeu de lumi\u00e8re visible durant quelques heures au terminateur (la fronti\u00e8re entre la partie \u00e9clair\u00e9e et la partie sombre) de <a href=\"https:\/\/www.stelvision.com\/astro\/la-lune-notre-satellite-naturel\/\">la Lune<\/a>, un peu avant le premier quartier.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Le X&nbsp;lunaire n\u2019est pas visible \u00e0 l\u2019\u0153il nu et c\u2019est sans doute la raison pour laquelle on ne le conna\u00eet que depuis 1978, lorsque l\u2019Am\u00e9ricain Dana Thompson l\u2019a d\u00e9couvert fortuitement au cours d\u2019une observation au t\u00e9lescope. En revanche, il se rep\u00e8re aux jumelles et est tr\u00e8s int\u00e9ressant \u00e0 observer avec n\u2019importe quel petit instrument permettant un grossissement d\u2019au moins 10&nbsp;fois.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Comment le localiser&nbsp;?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Ce jeu de lumi\u00e8re se pr\u00e9sente, vous l\u2019aurez compris, sous la forme d\u2019une croix se formant \u00e0 l\u2019intersection des crat\u00e8res Purbach, La Caille, Blanchinus et Regiomontanus, qui se situent <em>grosso modo<\/em> au centre de la moiti\u00e9 sud du disque lunaire.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Au sud-est de la zone qui nous int\u00e9resse, le crat\u00e8re Werner se dessine bien au moment o\u00f9 le X se forme. En raison de cet environnement, le X lunaire porte \u00e9galement les noms de Werner X ou croix de Purbach.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ne cherchez pas ces noms sur les cartes car seules les formations g\u00e9ologiques ont \u00e9t\u00e9 nomm\u00e9es officiellement. Pour localiser l\u2019endroit o\u00f9 le X appara\u00eet, il faut donc rep\u00e9rer les crat\u00e8res situ\u00e9s \u00e0 proximit\u00e9, sauf lorsqu\u2019il est d\u00e9j\u00e0 bien visible et dans ce cas, immanquable&nbsp;!<\/p>\n\n\n<div class=\"wp-block-image size-full wp-image-277\">\n<figure class=\"aligncenter\"><img decoding=\"async\" width=\"834\" height=\"668\" src=\"https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/02\/02.jpg\" alt=\"Disposition des crat\u00e8res autour du X lunaire\" class=\"wp-image-277\" srcset=\"https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/02\/02.jpg 834w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/02\/02-300x240.jpg 300w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/02\/02-768x615.jpg 768w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/02\/02-750x601.jpg 750w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/02\/02-570x457.jpg 570w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/02\/02-368x295.jpg 368w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/02\/02-270x216.jpg 270w\" sizes=\"(max-width: 834px) 100vw, 834px\" \/><figcaption class=\"wp-element-caption\"><strong>Disposition des crat\u00e8res autour du X lunaire (indiqu\u00e9 par la croix). Seuls les crat\u00e8res de la partie \u00e9clair\u00e9e pourront vous aider pour le rep\u00e9rage avant l\u2019apparition du X.<\/strong> <small>Image&nbsp;: Atlas Virtuel de la Lune<\/small><\/figcaption><\/figure>\n<\/div>\n\n\n<h2 class=\"wp-block-heading\">Que voir&nbsp;?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Le X&nbsp;lunaire correspond \u00e0 l\u2019illumination de cr\u00eates en avant du terminateur, au lever du Soleil, les terrains environnants moins \u00e9lev\u00e9s restant donc dans le noir.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Son principal int\u00e9r\u00eat r\u00e9side dans son caract\u00e8re \u00e9volutif. Des changements sont perceptibles en 20&nbsp;minutes seulement, la s\u00e9quence compl\u00e8te d\u2019observation ayant une dur\u00e9e d\u2019environ quatre heures. Les cr\u00eates du crat\u00e8re Purbach sont les premi\u00e8res illumin\u00e9es, formant en une heure environ les deux bras les plus \u00e0 l\u2019ouest du X. Puis il faut 30 \u00e0 40&nbsp;minutes suppl\u00e9mentaires pour que celles du crat\u00e8re Blanchinus s\u2019\u00e9clairent aussi, formant les deux autres bras.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Une fois enti\u00e8rement apparue, la croix est particuli\u00e8rement brillante et visible. Mais il faut en profiter tr\u00e8s vite car l\u2019inexorable lever du Soleil sur les terrains alentours la fait ensuite dispara\u00eetre en un peu moins de deux heures.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><iframe loading=\"lazy\" title=\"The lunar X - an animated view\" width=\"1778\" height=\"1000\" src=\"https:\/\/www.youtube.com\/embed\/cwwJoQ-7_-E?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Cette vid\u00e9o montre l\u2019apparition du X&nbsp;lunaire \u00e0 plusieurs grossissements (chaque animation couvre 6 \u00e0 8&nbsp;heures) ainsi que le film de son apparition en gros plan \u00e0 partir des images de la sonde Lunar Reconnaissance Orbiter (LRO). <\/strong><small>Image&nbsp;: John Moore<\/small><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Le bon moment<\/h2>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-8f761849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"652\" height=\"800\" src=\"https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/02\/03-dessin-Werner-X-lunaire.jpg\" alt=\"Le X lunaire ou Werner X dessin Carine Souplet\" class=\"wp-image-284\" srcset=\"https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/02\/03-dessin-Werner-X-lunaire.jpg 652w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/02\/03-dessin-Werner-X-lunaire-245x300.jpg 245w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/02\/03-dessin-Werner-X-lunaire-570x699.jpg 570w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/02\/03-dessin-Werner-X-lunaire-368x452.jpg 368w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/02\/03-dessin-Werner-X-lunaire-270x331.jpg 270w\" sizes=\"(max-width: 652px) 100vw, 652px\" \/><figcaption class=\"wp-element-caption\">Le X lunaire dessin\u00e9 au pastel sec sur papier noir avec un grossissement de 200 fois. Dessin : Carine Souplet<br><\/figcaption><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"wp-block-paragraph\">Le lever du Soleil sur ce coin de Lune se reproduisant tous les 29\u00a0jours environ, on pourrait croire qu\u2019il est possible de voir le X\u00a0lunaire \u00e0 chaque fois\u2026 Mais non\u00a0! En effet, pour un lieu donn\u00e9, ce moment pr\u00e9cis se produit souvent alors que la Lune est\u2026 derri\u00e8re l\u2019horizon\u00a0! En moyenne, un observateur peut observer le X\u00a0lunaire de chez lui entre une et cinq fois par an. Il faut donc recalculer chaque ann\u00e9e les apparitions favorables en fonction du lieu d\u2019observation et gr\u00e2ce aux param\u00e8tres donn\u00e9s dans l&rsquo;encadr\u00e9 ci-dessous. <\/p>\n<\/div>\n<\/div>\n\n\n\n<p class=\"boxFocus-solid-color2 wp-block-paragraph\"><em>Pour rep\u00e9rer le X&nbsp;lunaire sur un logiciel de cartographie (par exemple, l\u2019Atlas virtuel de la Lune de Christian Legrand et Patrick Chevalley, gratuit et t\u00e9l\u00e9chargeable sur <a href=\"https:\/\/www.ap-i.net\/avl\/fr\/start\">https:\/\/www.ap-i.net\/avl\/fr\/start<\/a>) et \u00e9tablir vos propres pr\u00e9visions&nbsp;:<\/em><br>&#8211; Coordonn\u00e9es du centre du X&nbsp;lunaire&nbsp;: 0,9\u00b0&nbsp;E-25,1\u00b0&nbsp;S<br>&#8211; Colongitude au moment o\u00f9 le X est complet&nbsp;: 358,0\u00b0&nbsp;+\/-&nbsp;1,2\u00b0 (donn\u00e9e moyenne \u00e9tablie par l\u2019am\u00e9ricain David Chapman qui a observ\u00e9 le X durant de nombreuses ann\u00e9es)<br>&#8211; \u00c9l\u00e9vation du Soleil sur la Lune au moment o\u00f9 le X appara\u00eet&nbsp;: entre -2\u00b0 et 0\u00b0<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Cherchez aussi le V !<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">La recherche du X&nbsp;lunaire vous amuse&nbsp;? Sachez qu\u2019une autre lettre de l\u2019alphabet appara\u00eet \u00e0 peu pr\u00e8s au m\u00eame moment&nbsp;: un V&nbsp;! Il est situ\u00e9 plus au nord, toujours en avant du terminateur. Pour le localiser sur un atlas, sachez qu\u2019il appara\u00eet au nord nord-est du petit crat\u00e8re Uckert.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img decoding=\"async\" width=\"864\" height=\"800\" src=\"https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/02\/04.jpg\" alt=\"photo V lunaire\" class=\"wp-image-285\" srcset=\"https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/02\/04.jpg 864w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/02\/04-300x278.jpg 300w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/02\/04-768x711.jpg 768w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/02\/04-750x694.jpg 750w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/02\/04-570x528.jpg 570w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/02\/04-368x341.jpg 368w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/02\/04-270x250.jpg 270w\" sizes=\"(max-width: 864px) 100vw, 864px\" \/><figcaption class=\"wp-element-caption\"><strong>Le V lunaire est \u00e9galement visible sur l\u2019image pr\u00e9sent\u00e9e en d\u00e9but d\u2019article. L\u2019aviez-vous remarqu\u00e9&nbsp;? Sinon, voici sa localisation&nbsp;!<\/strong> <small>Cr\u00e9dit : Daniel Henrion<\/small><\/figcaption><\/figure>\n<\/div>\n\n\n<p class=\"wp-block-paragraph\">Par chance, le V appara\u00eet toujours presque en m\u00eame temps que le X en raison de sa position. Sachez que son observation est moins souvent rapport\u00e9e que celle du X alors&#8230; tentez votre chance\u00a0!<\/p>\n\n\n<div class=\"rwwp-featured-content-wrapper\"><div class=\"stel-auto-swiffy-slider rwwp-featured-content rwwp-featured-content-slides rwwp-featured-content-slides-alignment-top rwwp-featured-content-slides-carousel-yes\"><div class=\"swiffy-slider slider-item-show1   slider-nav-visible slider-nav-outside slider-nav-autoplay  slider-nav-dark slider-nav-autohide slider-item-first-visible slider-nav-autopause\" data-slider-nav-autoplay-interval=\"4000\" data-rwstelwp-uid=\"1782183638\"><ul class=\"slider-container\"><li data-stel-auto-swiffy-slider-offset=\"18\"><div class=\"rwwp-featured-content-item rwwp-featured-content-item-product rwwp-featured-content-item-small\"><div class=\"woocommerce columns-1 stel-product-no-add_to_cart\"><ul class=\"products columns-1\">\n<li class=\"product type-product post-70853 status-publish first instock product_cat-edition 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product-type-simple\">\n\t<div class=\"stel-wc-product\"><a href=\"https:\/\/www.stelvision.com\/astro\/boutique\/lunettes-eclipse\/\" title=\"Lunettes d&#039;&eacute;clipse Soleils noirs (Certifi&eacute;es CE, design exclusif Stelvision)\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\"><img decoding=\"async\" width=\"300\" height=\"300\" src=\"https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2026\/06\/lunette-d-eclipse-soleils-noirs-trois-quarts-droite-unt-300x300.jpg\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"photo Lunettes d&#039;\u00e9clipse Soleils noirs, vue 3\/4 droite\" srcset=\"https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2026\/06\/lunette-d-eclipse-soleils-noirs-trois-quarts-droite-unt-300x300.jpg 300w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2026\/06\/lunette-d-eclipse-soleils-noirs-trois-quarts-droite-unt-150x150.jpg 150w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2026\/06\/lunette-d-eclipse-soleils-noirs-trois-quarts-droite-unt-600x600.jpg 600w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2026\/06\/lunette-d-eclipse-soleils-noirs-trois-quarts-droite-unt-750x750.jpg 750w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2026\/06\/lunette-d-eclipse-soleils-noirs-trois-quarts-droite-unt-570x570.jpg 570w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2026\/06\/lunette-d-eclipse-soleils-noirs-trois-quarts-droite-unt-368x368.jpg 368w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2026\/06\/lunette-d-eclipse-soleils-noirs-trois-quarts-droite-unt-270x270.jpg 270w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2026\/06\/lunette-d-eclipse-soleils-noirs-trois-quarts-droite-unt-62x62.jpg 62w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2026\/06\/lunette-d-eclipse-soleils-noirs-trois-quarts-droite-unt-100x100.jpg 100w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2026\/06\/lunette-d-eclipse-soleils-noirs-trois-quarts-droite-unt.jpg 800w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><h2 class=\"woocommerce-loop-product__title\">Lunettes d&rsquo;\u00e9clipse Soleils noirs (Certifi\u00e9es CE, design exclusif Stelvision)<div class=\"stel-product-item-review-wrapper\"><div class=\"skeepers_product__stars\" data-product-id=\"70777\"><\/div><\/div><\/h2>\r\n\t<span class=\"price\"><span class=\"woocommerce-Price-amount amount\"><bdi>3.90<span class=\"woocommerce-Price-currencySymbol\">&euro;<\/span><\/bdi><\/span> <span class=\"rwwc-vat-price-hint\" onclick=\"rwStelvisionWooTaxesInfos.showTaxHintModal(event)\">TVA incluse (FR) <i class=\"neko-icon-info-circled\"><\/i><\/span><\/span>\r\n<div class=\"netreviews_bg_stars_big listStars\" title=\"4.818\/5\"><div><span class=\"nr-icon nr-star grey\"><\/span><span class=\"nr-icon nr-star grey\"><\/span><span class=\"nr-icon nr-star grey\"><\/span><span class=\"nr-icon nr-star grey\"><\/span><span class=\"nr-icon nr-star grey\"><\/span><\/div><div style=\"color: #4FB8D7 !important\"><span class=\"nr-icon nr-star\" style=\"width:20%;\"><\/span><span class=\"nr-icon nr-star\" style=\"width:20%;\"><\/span><span class=\"nr-icon nr-star\" style=\"width:20%;\"><\/span><span class=\"nr-icon nr-star\" style=\"width:20%;\"><\/span><span class=\"nr-icon nr-star\" style=\"width:16%;\"><\/span><\/div> <span class=\"reviewCount\">44 avis<\/span><\/div><\/a><span class=\" rw_stelvision_product_in_stock \"><span class=\"rw_stelvision_product_stock_msg\">En stock<\/span><\/span><a href=\"\/astro\/wp-json\/wp\/v2\/posts\/275?add-to-cart=70777\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_70777_1\" data-quantity=\"1\" data-product_id=\"70777\" data-product-title=\"Lunettes d&rsquo;\u00e9clipse Soleils noirs (Certifi\u00e9es CE, design exclusif Stelvision)&lt;div class=&quot;stel-product-item-review-wrapper&quot;&gt;&lt;div class=&quot;skeepers_product__stars&quot; data-product-id=&quot;70777&quot;&gt;&lt;\/div&gt;&lt;\/div&gt;\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart\" data-product_id=\"70777\" data-product_sku=\"3770011947485\" aria-label=\"Ajouter au panier\u00a0: &ldquo;Lunettes d&#039;\u00e9clipse Soleils noirs (Certifi\u00e9es CE, design exclusif Stelvision)&rdquo;\" rel=\"nofollow\" data-success_message=\"\u00ab\u00a0Lunettes d&#039;\u00e9clipse Soleils noirs (Certifi\u00e9es CE, design exclusif Stelvision)\u00a0\u00bb a \u00e9t\u00e9 ajout\u00e9 \u00e0 votre panier\" role=\"button\">Ajouter au panier<\/a><span id=\"woocommerce_loop_add_to_cart_link_describedby_70777_1\" class=\"screen-reader-text\"><\/span><\/div><\/li>\n<\/ul>\n<\/div><\/div><\/li><li data-stel-auto-swiffy-slider-offset=\"18\"><div class=\"rwwp-featured-content-item rwwp-featured-content-item-product rwwp-featured-content-item-small\"><div class=\"woocommerce columns-1 stel-product-no-add_to_cart\"><ul class=\"products columns-1\">\n<li class=\"product type-product post-1449 status-publish first instock product_cat-edition has-post-thumbnail taxable shipping-taxable purchasable product-type-simple\">\n\t<div class=\"stel-wc-product\"><a href=\"https:\/\/www.stelvision.com\/astro\/boutique\/carte-guide-du-ciel-stelvision-365\/\" title=\"Carte du ciel Stelvision 365 (16&egrave;me &eacute;dition)\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\"><img decoding=\"async\" width=\"300\" height=\"300\" src=\"https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2026\/04\/stelvision-365-ed16-1-couverture-1200-carre-300x300.webp\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"Visuel de couverture de la Carte du ciel Stelvision 365 \u00e9dition 16 de Bertrand d&#039;Armagnac. Copyright Stelvision.\" srcset=\"https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2026\/04\/stelvision-365-ed16-1-couverture-1200-carre-300x300.webp 300w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2026\/04\/stelvision-365-ed16-1-couverture-1200-carre-1024x1024.webp 1024w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2026\/04\/stelvision-365-ed16-1-couverture-1200-carre-150x150.webp 150w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2026\/04\/stelvision-365-ed16-1-couverture-1200-carre-600x600.webp 600w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2026\/04\/stelvision-365-ed16-1-couverture-1200-carre-1140x1140.webp 1140w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2026\/04\/stelvision-365-ed16-1-couverture-1200-carre-750x750.webp 750w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2026\/04\/stelvision-365-ed16-1-couverture-1200-carre-570x570.webp 570w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2026\/04\/stelvision-365-ed16-1-couverture-1200-carre-368x368.webp 368w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2026\/04\/stelvision-365-ed16-1-couverture-1200-carre-270x270.webp 270w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2026\/04\/stelvision-365-ed16-1-couverture-1200-carre-62x62.webp 62w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2026\/04\/stelvision-365-ed16-1-couverture-1200-carre-100x100.webp 100w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2026\/04\/stelvision-365-ed16-1-couverture-1200-carre-1000x1000.webp 1000w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2026\/04\/stelvision-365-ed16-1-couverture-1200-carre.webp 1200w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><h2 class=\"woocommerce-loop-product__title\">Carte du ciel Stelvision 365 (16\u00e8me \u00e9dition)<div class=\"stel-product-item-review-wrapper\"><div class=\"skeepers_product__stars\" data-product-id=\"1449\"><\/div><\/div><\/h2>\r\n\t<span class=\"price\"><span class=\"woocommerce-Price-amount amount\"><bdi>19.90<span class=\"woocommerce-Price-currencySymbol\">&euro;<\/span><\/bdi><\/span> <span class=\"rwwc-vat-price-hint\" onclick=\"rwStelvisionWooTaxesInfos.showTaxHintModal(event)\">TVA incluse (FR) <i class=\"neko-icon-info-circled\"><\/i><\/span><\/span>\r\n<div class=\"netreviews_bg_stars_big listStars\" title=\"4.851\/5\"><div><span class=\"nr-icon nr-star grey\"><\/span><span class=\"nr-icon nr-star grey\"><\/span><span class=\"nr-icon nr-star grey\"><\/span><span class=\"nr-icon nr-star grey\"><\/span><span class=\"nr-icon nr-star grey\"><\/span><\/div><div style=\"color: #4FB8D7 !important\"><span class=\"nr-icon nr-star\" style=\"width:20%;\"><\/span><span class=\"nr-icon nr-star\" style=\"width:20%;\"><\/span><span class=\"nr-icon nr-star\" style=\"width:20%;\"><\/span><span class=\"nr-icon nr-star\" style=\"width:20%;\"><\/span><span class=\"nr-icon nr-star\" style=\"width:18%;\"><\/span><\/div> <span class=\"reviewCount\">162 avis<\/span><\/div><\/a><span class=\" rw_stelvision_product_in_stock \"><span class=\"rw_stelvision_product_stock_msg\">En stock<\/span><\/span><a href=\"\/astro\/wp-json\/wp\/v2\/posts\/275?add-to-cart=1449\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_1449_2\" data-quantity=\"1\" data-product_id=\"1449\" data-product-title=\"Carte du ciel Stelvision 365 (16\u00e8me \u00e9dition)&lt;div class=&quot;stel-product-item-review-wrapper&quot;&gt;&lt;div class=&quot;skeepers_product__stars&quot; data-product-id=&quot;1449&quot;&gt;&lt;\/div&gt;&lt;\/div&gt;\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart\" data-product_id=\"1449\" data-product_sku=\"9782958661977\" aria-label=\"Ajouter au panier\u00a0: &ldquo;Carte du ciel Stelvision 365 (16\u00e8me \u00e9dition)&rdquo;\" rel=\"nofollow\" data-success_message=\"\u00ab\u00a0Carte du ciel Stelvision 365 (16\u00e8me \u00e9dition)\u00a0\u00bb a \u00e9t\u00e9 ajout\u00e9 \u00e0 votre panier\" role=\"button\">Ajouter au panier<\/a><span id=\"woocommerce_loop_add_to_cart_link_describedby_1449_2\" class=\"screen-reader-text\"><\/span><\/div><\/li>\n<\/ul>\n<\/div><\/div><\/li><li data-stel-auto-swiffy-slider-offset=\"18\"><div class=\"rwwp-featured-content-item rwwp-featured-content-item-product rwwp-featured-content-item-small\"><div class=\"woocommerce columns-1 stel-product-no-add_to_cart\"><ul class=\"products columns-1\">\n<li class=\"product type-product post-54136 status-publish first instock product_cat-jumelles product_tag--notre-selection-pour-lete has-post-thumbnail taxable shipping-taxable purchasable product-type-simple\">\n\t<div class=\"stel-wc-product\"><a href=\"https:\/\/www.stelvision.com\/astro\/boutique\/jumelles-noctua-2x40\/\" title=\"Jumelles Noctua &laquo;&amp;nbsp;yeux de hibou&amp;nbsp;&raquo;\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\"><img decoding=\"async\" width=\"300\" height=\"300\" src=\"https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2023\/05\/noctua_03-300x300.jpg\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"photo Jumelles Noctua 2x40\" srcset=\"https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2023\/05\/noctua_03-300x300.jpg 300w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2023\/05\/noctua_03-150x150.jpg 150w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2023\/05\/noctua_03-600x600.jpg 600w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2023\/05\/noctua_03-750x750.jpg 750w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2023\/05\/noctua_03-570x570.jpg 570w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2023\/05\/noctua_03-368x368.jpg 368w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2023\/05\/noctua_03-270x270.jpg 270w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2023\/05\/noctua_03-62x62.jpg 62w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2023\/05\/noctua_03-100x100.jpg 100w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2023\/05\/noctua_03.jpg 1000w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><h2 class=\"woocommerce-loop-product__title\">Jumelles Noctua \u00ab&nbsp;yeux de hibou&nbsp;\u00bb<div class=\"stel-product-item-review-wrapper\"><div class=\"skeepers_product__stars\" data-product-id=\"54136\"><\/div><\/div><\/h2>\r\n\t<span class=\"price\"><span class=\"woocommerce-Price-amount amount\"><bdi>89.90<span class=\"woocommerce-Price-currencySymbol\">&euro;<\/span><\/bdi><\/span> <span class=\"rwwc-vat-price-hint\" onclick=\"rwStelvisionWooTaxesInfos.showTaxHintModal(event)\">TVA incluse (FR) <i class=\"neko-icon-info-circled\"><\/i><\/span><\/span>\r\n<div class=\"netreviews_bg_stars_big listStars\" title=\"4.728\/5\"><div><span class=\"nr-icon nr-star grey\"><\/span><span class=\"nr-icon nr-star grey\"><\/span><span class=\"nr-icon nr-star grey\"><\/span><span class=\"nr-icon nr-star grey\"><\/span><span class=\"nr-icon nr-star grey\"><\/span><\/div><div style=\"color: #4FB8D7 !important\"><span class=\"nr-icon nr-star\" style=\"width:20%;\"><\/span><span class=\"nr-icon nr-star\" style=\"width:20%;\"><\/span><span class=\"nr-icon nr-star\" style=\"width:20%;\"><\/span><span class=\"nr-icon nr-star\" style=\"width:20%;\"><\/span><span class=\"nr-icon nr-star\" style=\"width:14%;\"><\/span><\/div> <span class=\"reviewCount\">59 avis<\/span><\/div><\/a><span class=\" rw_stelvision_product_in_stock \"><span class=\"rw_stelvision_product_stock_msg\">En stock<\/span><\/span><a href=\"\/astro\/wp-json\/wp\/v2\/posts\/275?add-to-cart=54136\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_54136_3\" data-quantity=\"1\" data-product_id=\"54136\" data-product-title=\"Jumelles Noctua \u00ab&nbsp;yeux de hibou&nbsp;\u00bb&lt;div class=&quot;stel-product-item-review-wrapper&quot;&gt;&lt;div class=&quot;skeepers_product__stars&quot; data-product-id=&quot;54136&quot;&gt;&lt;\/div&gt;&lt;\/div&gt;\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart\" data-product_id=\"54136\" data-product_sku=\"3770011947386\" aria-label=\"Ajouter au panier\u00a0: &ldquo;Jumelles Noctua \u00ab&nbsp;yeux de hibou&nbsp;\u00bb&rdquo;\" rel=\"nofollow\" data-success_message=\"\u00ab\u00a0Jumelles Noctua \u00ab&nbsp;yeux de hibou&nbsp;\u00bb\u00a0\u00bb a \u00e9t\u00e9 ajout\u00e9 \u00e0 votre panier\" role=\"button\">Ajouter au panier<\/a><span id=\"woocommerce_loop_add_to_cart_link_describedby_54136_3\" class=\"screen-reader-text\"><\/span><\/div><\/li>\n<\/ul>\n<\/div><\/div><\/li><li data-stel-auto-swiffy-slider-offset=\"18\"><div class=\"rwwp-featured-content-item rwwp-featured-content-item-product rwwp-featured-content-item-small\"><div class=\"woocommerce columns-1 stel-product-no-add_to_cart\"><ul class=\"products columns-1\">\n<li class=\"product type-product post-1408 status-publish first instock product_cat-edition has-post-thumbnail taxable shipping-taxable purchasable product-type-simple\">\n\t<div class=\"stel-wc-product\"><a href=\"https:\/\/www.stelvision.com\/astro\/boutique\/plaid-etoile-stelvision\/\" title=\"Plaid &eacute;toil&eacute; Stelvision\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\"><img decoding=\"async\" width=\"300\" height=\"300\" src=\"https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/06\/plaid-etoiles-4-300x300.jpg\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"photo plaid \u00e9toil\u00e9 Stelvision\" srcset=\"https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/06\/plaid-etoiles-4-300x300.jpg 300w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/06\/plaid-etoiles-4-150x150.jpg 150w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/06\/plaid-etoiles-4-62x62.jpg 62w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/06\/plaid-etoiles-4-100x100.jpg 100w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><h2 class=\"woocommerce-loop-product__title\">Plaid \u00e9toil\u00e9 Stelvision<div class=\"stel-product-item-review-wrapper\"><div class=\"skeepers_product__stars\" data-product-id=\"1408\"><\/div><\/div><\/h2>\r\n\t<span class=\"price\"><span class=\"woocommerce-Price-amount amount\"><bdi>29.90<span class=\"woocommerce-Price-currencySymbol\">&euro;<\/span><\/bdi><\/span> <span class=\"rwwc-vat-price-hint\" onclick=\"rwStelvisionWooTaxesInfos.showTaxHintModal(event)\">TVA incluse (FR) <i class=\"neko-icon-info-circled\"><\/i><\/span><\/span>\r\n<div class=\"netreviews_bg_stars_big listStars\" title=\"4.777\/5\"><div><span class=\"nr-icon nr-star grey\"><\/span><span class=\"nr-icon nr-star grey\"><\/span><span class=\"nr-icon nr-star grey\"><\/span><span class=\"nr-icon nr-star grey\"><\/span><span class=\"nr-icon nr-star grey\"><\/span><\/div><div style=\"color: #4FB8D7 !important\"><span class=\"nr-icon nr-star\" style=\"width:20%;\"><\/span><span class=\"nr-icon nr-star\" style=\"width:20%;\"><\/span><span class=\"nr-icon nr-star\" style=\"width:20%;\"><\/span><span class=\"nr-icon nr-star\" style=\"width:20%;\"><\/span><span class=\"nr-icon nr-star\" style=\"width:16%;\"><\/span><\/div> <span class=\"reviewCount\">9 avis<\/span><\/div><\/a><span class=\" rw_stelvision_product_in_stock \"><span class=\"rw_stelvision_product_stock_msg\">En stock<\/span><\/span><a href=\"\/astro\/wp-json\/wp\/v2\/posts\/275?add-to-cart=1408\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_1408_4\" data-quantity=\"1\" data-product_id=\"1408\" data-product-title=\"Plaid \u00e9toil\u00e9 Stelvision&lt;div class=&quot;stel-product-item-review-wrapper&quot;&gt;&lt;div class=&quot;skeepers_product__stars&quot; data-product-id=&quot;1408&quot;&gt;&lt;\/div&gt;&lt;\/div&gt;\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart\" data-product_id=\"1408\" data-product_sku=\"3770011947126\" aria-label=\"Ajouter au panier\u00a0: &ldquo;Plaid \u00e9toil\u00e9 Stelvision&rdquo;\" rel=\"nofollow\" data-success_message=\"\u00ab\u00a0Plaid \u00e9toil\u00e9 Stelvision\u00a0\u00bb a \u00e9t\u00e9 ajout\u00e9 \u00e0 votre panier\" role=\"button\">Ajouter au panier<\/a><span id=\"woocommerce_loop_add_to_cart_link_describedby_1408_4\" class=\"screen-reader-text\"><\/span><\/div><\/li>\n<\/ul>\n<\/div><\/div><\/li><\/ul><button type=\"button\" class=\"slider-nav\" title=\"Slide pr&eacute;c&eacute;dente\"><\/button><button type=\"button\" class=\"slider-nav slider-nav-next\" title=\"Slide suivante\"><\/button><\/div><script type=\"text\/javascript\">\/*!rw_stel_js*\/rw_stelvision_theme_ready(\"rw_stelvision_theme\",function(){rw_stelvision_theme.swiffySliderAutoSlideSizes();});<\/script><\/div><\/div>\n","protected":false},"excerpt":{"rendered":"<p>La Lune, cible attrayante et facile pour tous les observateurs, rec\u00e8le quelques observations originales dont le X&nbsp;lunaire fait partie. Mais attention, car son apparition est\u2026 <a href=\"https:\/\/www.stelvision.com\/astro\/le-x-lunaire\/\" class=\"more-link\">&#8230;<span class=\"screen-reader-text\">  Le X lunaire<\/span><\/a><\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[2],"tags":[],"class_list":["post-275","post","type-post","status-publish","format-standard","hentry","category-observer-le-ciel"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Le X lunaire (Werner X)<\/title>\n<meta name=\"description\" content=\"Quand et comment observer le X lunaire appel\u00e9 aussi Werner X sur la surface de la Lune en 2025.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link 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