{"id":1434,"date":"2023-08-03T11:34:14","date_gmt":"2023-08-03T09:34:14","guid":{"rendered":"https:\/\/www.vulcania.com\/science\/?page_id=1434"},"modified":"2025-10-31T10:21:27","modified_gmt":"2025-10-31T09:21:27","slug":"ephemeride-aout","status":"publish","type":"page","link":"https:\/\/www.vulcania.com\/science\/espace\/ephemerides\/ephemeride-aout\/","title":{"rendered":"L’\u00e9ph\u00e9m\u00e9ride du mois d’ao\u00fbt"},"content":{"rendered":"

[vc_row el_class=\u00a0\u00bbbloc-titre\u00a0\u00bb][vc_column width=\u00a0\u00bb1\/12″][\/vc_column][vc_column width=\u00a0\u00bb10\/12″][vc_column_text el_class=\u00a0\u00bbintro\u00a0\u00bb]Il est encore temps d\u2019observer le ciel estival ! Ce mois d\u2019ao\u00fbt r\u00e9serve encore de belles surprises et de merveilleux \u00e9v\u00e8nements c\u00e9lestes.[\/vc_column_text][vc_column_text]<\/p>\n

Quelles constellations observer ?<\/h2>\n

D\u00e8s le d\u00e9but de soir\u00e9e, tentez de retrouver le triangle d\u2019\u00e9t\u00e9<\/strong>. Cette figure embl\u00e9matique de nos nuits estivales est compos\u00e9e de l\u2019\u00e9toile V\u00e9ga<\/strong> dans la constellation de la Lyre<\/strong>, l\u2019\u00e9toile Deneb<\/strong> dans le Cygne<\/strong> et l\u2019\u00e9toile Alta\u00efr<\/strong> dans l\u2019Aigle<\/strong>. Il culmine tr\u00e8s haut dans le ciel et semble \u00eatre travers\u00e9 par un ruban laiteux qui n\u2019est autre que la voie lact\u00e9e, notre galaxie que nous voyons par la tranche. Suivez ce chemin c\u00e9leste jusque vers l\u2019horizon sud et vous pourrez alors retrouver de part et d\u2019autre la constellation du Sagittaire<\/strong>, \u00e0 gauche et la constellation du Scorpion<\/strong> \u00e0 droite, dont l\u2019\u00e9toile principal Antar\u00e8s<\/strong> est facilement reconnaissable \u00e0 sa couleur rouge\/orang\u00e9e. Pour compl\u00e9ter ce tableau, essayez de rep\u00e9rer au z\u00e9nith la constellation d\u2019Hercule<\/strong> qui sera accompagn\u00e9 de la couronne bor\u00e9ale dont la forme en arc de cercle est facilement observable.[\/vc_column_text][vc_column_text]<\/p>\n

Quelles plan\u00e8tes au rendez-vous ?<\/h2>\n

Alors que V\u00e9nus et Mercure nous ont accompagn\u00e9s en d\u00e9but de soir\u00e9e pendant ces derni\u00e8res semaines, les deux plan\u00e8tes les plus proches de notre \u00e9toile se situent maintenant entre la Terre et le Soleil et ne sont donc plus visibles dans le ciel du soir. Vous pourrez n\u00e9anmoins observer Mars<\/strong> juste apr\u00e8s le coucher du Soleil, mais son observation sera rendue difficile par la pr\u00e9sence des lueurs du jour et de sa position tr\u00e8s basse sur l\u2019horizon Ouest.<\/p>\n

Il sera par contre possible d\u2019observer les deux g\u00e9antes gazeuse Saturne<\/strong> et Jupiter<\/strong> qui se l\u00e8veront respectivement face \u00e0 l\u2019Ouest entre la fin de soir\u00e9e et le d\u00e9but de nuit.[\/vc_column_text][vc_column_text]<\/p>\n

Des rencontres c\u00e9lestes<\/h2>\n

Le rapprochement visuel de deux ou plusieurs astres sur la vo\u00fbte c\u00e9leste, appel\u00e9 conjonction<\/em>, est toujours un moment fascinant pour l\u2019observateur. Plusieurs de ces rendez-vous auront lieu ce mois-ci. On commence le 3 ao\u00fbt<\/strong> en seconde partie de soir\u00e9e, avec un joli rapprochement entre la Lune<\/strong> et Saturne<\/strong>, suivi du 8 ao\u00fbt<\/strong> ou l\u2019astre s\u00e9l\u00e8ne aura rendez-vous avec la plus grosse plan\u00e8te du Syst\u00e8me Solaire, en d\u00e9but de nuit. Le dernier rendez-vous c\u00e9leste de ce mois aura lieu le 24 ao\u00fbt<\/strong> entre notre satellite naturel et Antar\u00e8s<\/strong>, l\u2019\u00e9toile principal du Scorpion surnomm\u00e9e aussi \u00ab\u00a0la rivale de Mars\u00a0\u00bb.[\/vc_column_text][vc_column_text]<\/p>\n

Quel est l\u2019\u00e9v\u00e8nement du mois d’ao\u00fbt ?<\/h2>\n

La pluie d\u2019\u00e9toiles filantes des Pers\u00e9ides<\/h3>\n

Comme chaque ann\u00e9e entre le 23 juillet et le 20 ao\u00fbt, la Terre traverse un nuage de poussi\u00e8res laiss\u00e9 par le passage de la com\u00e8te Swift-Tuttle. Quand ces petits grains de la taille d\u2019un grain de sable ou d\u2019un petit pois p\u00e9n\u00e8trent l\u2019atmosph\u00e8re terrestre, ils se consument et cr\u00e9ent une \u00e9toile filante.<\/p>\n

Les Pers\u00e9ides sont la pluie d\u2019\u00e9toiles filantes la plus connue de l\u2019ann\u00e9e. Le maximum de cette pluie aura lieu dans la nuit du 13 au 14 ao\u00fbt<\/strong>. Pour les observer, attendez la seconde partie de nuit et orientez votre regard vers la constellation de Pers\u00e9e<\/strong> tous en vous \u00e9loignant de la pollution lumineuse. Si certains m\u00e9t\u00e9ores peuvent \u00eatre brillants, la plupart sont peu lumineux et ne seront visibles que dans un ciel loin de la lumi\u00e8re des villes. Cette ann\u00e9e, selon les estimations, il sera possible d\u2019observer entre 70 et 100 \u00e9toiles filantes par heure<\/strong>.[\/vc_column_text][\/vc_column][vc_column width=\u00a0\u00bb1\/12″][\/vc_column][\/vc_row][vc_row][vc_column][vc_text_separator title=\u00a0\u00bbExp\u00e9rimentez \u00e0 Vulcania\u00a0\u00bb color=\u00a0\u00bbcustom\u00a0\u00bb style=\u00a0\u00bbdashed\u00a0\u00bb accent_color=\u00a0\u00bb#888888″][vc_row_inner][vc_column_inner width=\u00a0\u00bb1\/12″][\/vc_column_inner][vc_column_inner width=\u00a0\u00bb5\/12″][vc_single_image image=\u00a0\u00bb1285″ img_size=\u00a0\u00bbmedium\u00a0\u00bb style=\u00a0\u00bbvc_box_rounded\u00a0\u00bb onclick=\u00a0\u00bbcustom_link\u00a0\u00bb link=\u00a0\u00bbhttps:\/\/www.vulcania.com\/planetarium\/\u00a0\u00bb][\/vc_column_inner][vc_column_inner width=\u00a0\u00bb5\/12″][vc_column_text]<\/p>\n

Ce soir dans le ciel<\/h3>\n

Laissez-vous embarquer pour une d\u00e9couverte des merveilles du ciel \u00e9toil\u00e9.[\/vc_column_text][vc_btn title=\u00a0\u00bbEn savoir plus sur le plan\u00e9tarium\u00a0\u00bb link=\u00a0\u00bburl:https%3A%2F%2Fwww.vulcania.com%2Fplanetarium%2F\u00a0\u00bb el_class=\u00a0\u00bbbouton coul-1″][\/vc_column_inner][vc_column_inner width=\u00a0\u00bb1\/12″][\/vc_column_inner][\/vc_row_inner][\/vc_column][\/vc_row]<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"

[vc_row el_class=\u00a0\u00bbbloc-titre\u00a0\u00bb][vc_column width=\u00a0\u00bb1\/12″][\/vc_column][vc_column width=\u00a0\u00bb10\/12″][vc_column_text el_class=\u00a0\u00bbintro\u00a0\u00bb]Il est encore temps d\u2019observer le ciel estival ! Ce mois d\u2019ao\u00fbt r\u00e9serve encore de belles surprises et de merveilleux \u00e9v\u00e8nements c\u00e9lestes.[\/vc_column_text][vc_column_text] Quelles constellations observer ? D\u00e8s le d\u00e9but de soir\u00e9e, tentez de retrouver le triangle d\u2019\u00e9t\u00e9. Cette figure embl\u00e9matique de nos nuits estivales est compos\u00e9e de l\u2019\u00e9toile V\u00e9ga dans la […]<\/p>\n","protected":false},"author":4,"featured_media":1436,"parent":1325,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"tags":[25,23],"acf":[],"yoast_head":"\nL'\u00e9ph\u00e9m\u00e9ride du mois d'ao\u00fbt<\/title>\n<meta name=\"description\" content=\"D\u00e9couvrez les \u00e9v\u00e9nements astronomiques \u00e0 ne pas manquer en ao\u00fbt, pour un \u00e9t\u00e9 inoubliable sous la vo\u00fbte c\u00e9leste.\" \/>\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.vulcania.com\/science\/espace\/ephemerides\/ephemeride-aout\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"L'\u00e9ph\u00e9m\u00e9ride du mois 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