{"id":729,"date":"2012-06-25T08:21:00","date_gmt":"2012-06-25T06:21:00","guid":{"rendered":"https:\/\/kids.esa.int\/euclid_mission_to_map_the_universe_s_darkest_secrets\/"},"modified":"2026-10-08T00:31:38","modified_gmt":"2026-10-07T22:31:38","slug":"euclid_mission_to_map_the_universe_s_darkest_secrets","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/fr\/euclid_mission_to_map_the_universe_s_darkest_secrets\/","title":{"rendered":"La mission Euclid va percer les secrets les plus sombres de l\u2019Univers"},"content":{"rendered":"
\n

L\u2019ESA a donn\u00e9 son feu vert pour la mission Euclid, dont l\u2019objectif consiste \u00e0 explorer la face cach\u00e9e de l\u2019Univers. Elle devrait \u00eatre lanc\u00e9e en 2020.<\/p>\n<\/div>\n

Le nom de la mission rend hommage \u00e0 Euclide, un c\u00e9l\u00e8bre math\u00e9maticien grec qui a v\u00e9cu vers 300 av. J.-C. et qui est consid\u00e9r\u00e9 comme le p\u00e8re fondateur de la g\u00e9om\u00e9trie. La mission Euclid vise \u00e0 am\u00e9liorer nos connaissances sur l'\u00e9nergie sombre et la mati\u00e8re noire, qui repr\u00e9senteraient plus de 95 % de la densit\u00e9 de l\u2019Univers.<\/p>\n

La mati\u00e8re noire est une substance invisible qui n\u2019\u00e9met ou n\u2019absorbe aucun type de lumi\u00e8re. Seule la fa\u00e7on dont sa gravit\u00e9 affecte les galaxies nous permet de la d\u00e9tecter. L\u2019\u00e9nergie sombre est encore plus myst\u00e9rieuse. Elle produirait une forme d\u2019antigravit\u00e9 poussant les galaxies de l\u2019Univers \u00e0 s\u2019\u00e9loigner de plus en plus vite.<\/p>\n

La mission embarquera un t\u00e9lescope spatial de 1,2 m\u00e8tre de diam\u00e8tre, ainsi que deux instruments scientifiques. En orbite \u00e0 plus de 1,5 million de kilom\u00e8tres de la Terre, Euclid va \u00e9tablir la cartographie 3D d\u2019environ deux milliards de galaxies, r\u00e9parties sur plus d'un tiers de l'ensemble du ciel. En observant des objets sur jusqu\u2019\u00e0 10 milliards d\u2019ann\u00e9es-lumi\u00e8re, la mission reviendra sur les origines de l\u2019Univers et nous permettra de mieux comprendre son \u00e9volution.<\/p>\n

En \u00e9tudiant comment la mati\u00e8re noire et l\u2019\u00e9nergie sombre d\u00e9terminent le d\u00e9placement et la distribution des groupes de galaxies, la mission Euclid devrait nous aider \u00e0 percer les secrets les plus sombres de l\u2019Univers.<\/p>","protected":false},"excerpt":{"rendered":"

ESA has given the final go-ahead for Euclid, an exciting new mission to explore the dark side of the Universe. The spacecraft is expected to lift off in 2020. Euclid […]<\/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\/2012\/06\/euclid2\/17869857-2-eng-GB\/Euclid.jpg","esa_banner_description":"Euclid","esa_banner_credit":"ESA - C. Carreau","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2012\/06\/Euclid2","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":[10,44,40],"tags":[],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-729","post","type-post","status-publish","format-standard","hentry","category-learn","category-spacecraft","category-technology"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/posts\/729","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=729"}],"version-history":[{"count":1,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/posts\/729\/revisions"}],"predecessor-version":[{"id":1872,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/posts\/729\/revisions\/1872"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/media?parent=729"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/categories?post=729"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/tags?post=729"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/panel?post=729"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/language?post=729"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/age?post=729"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/duration?post=729"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/resource_type?post=729"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/audience?post=729"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/wf_post_folders?post=729"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}