{"id":1121,"date":"2004-11-15T16:17:00","date_gmt":"2004-11-15T15:17:00","guid":{"rendered":"https:\/\/kids.esa.int\/moon_phases\/"},"modified":"2026-10-08T00:36:14","modified_gmt":"2026-10-07T22:36:14","slug":"moon_phases","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/fr\/moon_phases\/","title":{"rendered":"Les phases lunaires"},"content":{"rendered":"
\n

Il y a plusieurs millions d\u2019ann\u00e9es, la Lune \u00e9tait bien plus proche et bien plus grosse dans le ciel. Elle tournait \u00e9galement plus vite sur elle-m\u00eame. Peu \u00e0 peu, elle a ralenti. Aujourd'hui, la Lune r\u00e9alise un tour complet en 27 jours, soit le temps qu'il faut pour faire le tour de la Terre. Cela signifie que nous voyons toujours le m\u00eame c\u00f4t\u00e9 de la Lune. Le c\u00f4t\u00e9 le plus \u00e9loign\u00e9 n'est jamais visible.<\/p>\n<\/div>\n

La Lune n'\u00e9met pas de lumi\u00e8re propre. Elle brille en r\u00e9fl\u00e9chissant la lumi\u00e8re du Soleil. Tout comme la Terre, la Lune pr\u00e9sente une moiti\u00e9 \u00e9clair\u00e9e par le jour et une moiti\u00e9 plong\u00e9e dans l'obscurit\u00e9 (la nuit). Il arrive parfois que l'on voie l'int\u00e9gralit\u00e9 de la face \u00e9clair\u00e9e : c'est ce qu'on appelle la \u2018 pleine lune \u2019.<\/p>\n

Parfois, on ne voit qu'un mince croissant lumineux, appel\u00e9 \u2018 croissant \u2019. Parfois, on ne voit pas du tout la Lune, car on observe sa face cach\u00e9e. C'est ce qu'on appelle la \u2018 nouvelle lune \u2019.<\/p>\n

Depuis la nuit des temps, les hommes ont observ\u00e9 la Lune changer de forme, passant d\u2019un mince croissant \u00e0 la pleine lune, puis inversement. Ces \u2018 phases \u2019 r\u00e9sultent du fait que la Lune effectue une orbite autour de la Terre tous les 29 jours et demi. Ce \u2018 mois \u2019 est utilis\u00e9 depuis des milliers d\u2019ann\u00e9es dans le monde entier pour mesurer le temps.<\/p>","protected":false},"excerpt":{"rendered":"

Millions of years ago, the Moon was much closer and bigger in the sky. It was also spinning much faster. Gradually, it slowed down. Today, the Moon completes one turn […]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"esa_banner_image":"https:\/\/www.esa.int\/var\/esa\/storage\/images\/esa_multimedia\/images\/2003\/02\/a_quarter_moon_seen_by_the_space_shuttle_columbia2\/17882695-2-eng-GB\/A_quarter_moon_seen_by_the_Space_Shuttle_Columbia.jpg","esa_banner_description":"Quarter moon seen by the Space Shuttle","esa_banner_credit":"AP Photo\/NASA","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2003\/02\/A_quarter_moon_seen_by_the_Space_Shuttle_Columbia2","esa_external_url":"","esa_external_new_window":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":true},"categories":[10,11,12],"tags":[2],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-1121","post","type-post","status-publish","format-standard","hentry","category-learn","category-our-universe","category-planets-and-moons","tag-background-article"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/posts\/1121","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/comments?post=1121"}],"version-history":[{"count":1,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/posts\/1121\/revisions"}],"predecessor-version":[{"id":2264,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/posts\/1121\/revisions\/2264"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/media?parent=1121"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/categories?post=1121"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/tags?post=1121"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/panel?post=1121"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/language?post=1121"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/age?post=1121"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/duration?post=1121"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/resource_type?post=1121"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/audience?post=1121"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/wf_post_folders?post=1121"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}