{"id":548,"date":"2015-01-16T12:55:00","date_gmt":"2015-01-16T11:55:00","guid":{"rendered":"https:\/\/kids.esa.int\/astronauts_catch_a_dragon\/"},"modified":"2026-10-08T00:29:30","modified_gmt":"2026-10-07T22:29:30","slug":"astronauts_catch_a_dragon","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/fr\/astronauts_catch_a_dragon\/","title":{"rendered":"Des astronautes attrapent un Dragon"},"content":{"rendered":"<div class=\"lede\">\n<p>La semaine derni\u00e8re, les astronautes Samantha Cristoforetti et Butch Wilmore ont supervis\u00e9 avec succ\u00e8s l\u2019amarrage du vaisseau de ravitaillement Dragon sur la Station spatiale internationale. Sa pr\u00e9cieuse cargaison contient des denr\u00e9es alimentaires et du mat\u00e9riel scientifique qui aidera les six astronautes de l'Exp\u00e9dition 42 \u00e0 conduire de nouvelles exp\u00e9riences.<\/p>\n<\/div>\n<p>Pour mener \u00e0 bien cette man\u0153uvre d\u00e9licate, les deux astronautes ont utilis\u00e9 le bras robotique de la coque ext\u00e9rieure de la Station afin de s\u00e9curiser l\u2019arriv\u00e9e du vaisseau et le maintenir fermement pendant le d\u00e9chargement du fret.<\/p>\n<p>La cargaison d\u00e9livr\u00e9e par Dragon comporte de nombreux composants essentiels aux nouvelles exp\u00e9riences scientifiques qu\u2019ex\u00e9cutera l\u2019\u00e9quipage de l\u2019ISS, et notamment de minuscules cellules pr\u00e9lev\u00e9es sur des mouches \u00e0 fruits, des vers plats, des fruits de mer... et m\u00eame des \u00eatres humains !<\/p>\n<p>Ce fret sp\u00e9cifique, le tout premier \u00e0 avoir \u00e9t\u00e9 d\u00e9charg\u00e9 par les astronautes, est destin\u00e9 \u00e0 une exp\u00e9rience dont la rapidit\u00e9 d'ex\u00e9cution est capitale. Quand les humains voyagent dans l\u2019espace, leur syst\u00e8me immunitaire ne fonctionne pas aussi bien que sur Terre. Pour nous aider \u00e0 comprendre ce ph\u00e9nom\u00e8ne, des chercheurs ont fait livrer sur l\u2019ISS plusieurs \u00e9chantillons de cellules immunitaires.<\/p>\n<figure class=\"wp-block-image size-large\" data-width=\"1024\" data-credit=\"ESA\" data-detail-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2015\/01\/Dragon_approaching_ISS\" data-licence=\"ESA Standard Licence\" data-licence-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Terms_and_conditions_of_use_of_images_and_videos_available_on_the_esa_website\"><img decoding=\"async\" loading=\"lazy\" style=\"max-width:100%;height:auto\" src=\"https:\/\/www.esa.int\/var\/esa\/storage\/images\/esa_multimedia\/images\/2015\/01\/dragon_approaching_iss\/17890429-2-eng-GB\/Dragon_approaching_ISS.jpg\" alt=\"Dragon approaching ISS\"><figcaption>Le Dragon s'approche de l'ISS<\/figcaption><\/figure>\n<p>Apr\u00e8s avoir voyag\u00e9 pendant deux jours \u00e0 bord du vaisseau Dragon, ces cellules ont \u00e9t\u00e9 imm\u00e9diatement plac\u00e9es dans un incubateur spatial. La prochaine \u00e9tape consistera \u00e0 d\u00e9clencher les m\u00e9canismes de d\u00e9fense naturels de ces cellules, puis de les congeler avant de les renvoyer sur Terre \u00e0 des fins d\u2019analyse.<\/p>\n<p>L\u2019une des missions de l\u2019\u00e9quipage consistera par ailleurs \u00e0 cr\u00e9er une \u00ab fausse infection \u00bb afin d\u2019activer les cellules immunitaires d\u2019autres formes de vie comme des rats ou des mollusques marins. Ils \u00e9tudieront alors la fa\u00e7on dont ces cellules se comportent dans des conditions d\u2019impesanteur, de gravit\u00e9 terrestre ou de gravit\u00e9 artificielle.<\/p>\n<p>Cette importante exp\u00e9rience scientifique vise \u00e0 comprendre si l\u2019\u00e9tat de d\u00e9r\u00e8glement immunitaire que nous subissons dans l\u2019espace est d\u00fb \u00e0 la faiblesse de la gravit\u00e9, \u00e0 la nocivit\u00e9 des rayons cosmiques ou \u00e0 une combinaison des deux.<\/p>\n<p><b>Anecdote sympa :<\/b> La capsule Dragon \u201c crache vraiment du feu \u201d gr\u00e2ce aux 18 propulseurs qui servent \u00e0 la diriger !<\/p>","protected":false},"excerpt":{"rendered":"<p>Earlier this week, astronauts Samantha Cristoforetti and Butch Wilmore captured the Dragon spacecraft as it arrived at the International Space Station carrying fresh supplies and new experiments for the six [&hellip;]<\/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\/2015\/01\/butch_and_samantha\/18246365-2-eng-GB\/Butch_and_Samantha.jpg","esa_banner_description":"Butch and Samantha","esa_banner_credit":"ESA","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2015\/01\/Butch_and_Samantha","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":[26],"tags":[],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-548","post","type-post","status-publish","format-standard","hentry","category-news"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/posts\/548","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=548"}],"version-history":[{"count":4,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/posts\/548\/revisions"}],"predecessor-version":[{"id":4542,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/posts\/548\/revisions\/4542"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/media?parent=548"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/categories?post=548"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/tags?post=548"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/panel?post=548"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/language?post=548"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/age?post=548"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/duration?post=548"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/resource_type?post=548"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/audience?post=548"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/wf_post_folders?post=548"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}