{"id":571,"date":"2014-09-03T10:03:00","date_gmt":"2014-09-03T08:03:00","guid":{"rendered":"https:\/\/kids.esa.int\/rosetta_makes_friends_with_a_comet\/"},"modified":"2026-10-08T00:29:46","modified_gmt":"2026-10-07T22:29:46","slug":"rosetta_makes_friends_with_a_comet","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/fr\/rosetta_makes_friends_with_a_comet\/","title":{"rendered":"Rosetta se lie d\u2019amiti\u00e9 avec une com\u00e8te"},"content":{"rendered":"
\n

Apr\u00e8s un p\u00e9riple de 10 longues ann\u00e9es \u00e0 la poursuite de sa cible, qui l\u2019aura vue parcourir plus de la moiti\u00e9 du syst\u00e8me solaire et faire cinq fois le tour du Soleil, la sonde spatiale Rosetta a enfin ralli\u00e9 sa destination : la com\u00e8te 67P\/Churyumov\u2013Gerasimenko !<\/p>\n<\/div>\n

Rosetta \u00e9volue actuellement en orbite \u00e0 environ 100 km de la surface de la com\u00e8te, ce qui lui permet d\u00e9j\u00e0 de nous envoyer de pr\u00e9cieuses informations sur sa nouvelle amie. Au cours des prochaines semaines, la mission de Rosetta consistera \u00e0 rechercher le meilleur site d\u2019atterrissage pour Philae, le petit module qu\u2019elle transporte depuis son lancement en 2004.<\/p>\n

Si tout se passe bien, d\u2019ici quelques mois, Philae deviendra le tout premier atterrisseur \u00e0 se poser \u00e0 la surface d\u2019une plan\u00e8te !<\/p>\n

Mais le voyage de Rosetta ne s'arr\u00eatera pas l\u00e0 : pendant de nombreux mois, la petite sonde accompagnera la com\u00e8te dans sa trajectoire autour du Soleil, puis dans son retour vers Jupiter.<\/p>\n

D\u2019ici un an, Rosetta et sa nouvelle amie atteindront le point le plus proche du Soleil dans leur p\u00e9riple autour du syst\u00e8me solaire. C\u2019est \u00e0 ce moment que la com\u00e8te commencera \u00e0 vraiment briller.<\/p>\n

Les com\u00e8tes sont des amas de roches et de glaces cosmiques, ce qui signifie qu\u2019en se rapprochant du Soleil, la com\u00e8te 67P commencera \u00e0 fondre sous l\u2019action du rayonnement solaire. La glace s\u2019\u00e9vaporant de la com\u00e8te cr\u00e9era alors une magnifique queue lumineuse, comme celles que nous avons parfois la chance d\u2019observer lorsque d\u2019autres corps c\u00e9lestes survolent notre plan\u00e8te.<\/p>\n

Malheureusement, la com\u00e8te 67P et sa queue lumineuse ne seront pas visibles dans notre sph\u00e8re c\u00e9leste sans de puissants t\u00e9lescopes, mais Rosetta nous offrira encore mieux : une vue rapproch\u00e9e des changements com\u00e9taires sous l\u2019effet du rayonnement solaire !<\/p>\n

Une anecdote sympa<\/h2>\n

Cette nouvelle mission spatiale de l\u2019ESA tire son nom de la pierre de Rosette, une ancienne st\u00e8le de l\u2019\u00c9gypte antique qui nous a permis de d\u00e9chiffrer les hi\u00e9roglyphes. Tout comme la pierre de Rosette, la mission qui porte son nom va nous aider \u00e0 am\u00e9liorer notre connaissance du pass\u00e9 en d\u00e9cryptant les myst\u00e8res d\u2019anciens objets. Pour Rosetta, il s\u2019agit d\u2019\u00e9tudier les com\u00e8tes, reliquats de la formation de notre syst\u00e8me solaire.<\/p>","protected":false},"excerpt":{"rendered":"

After travelling for 10 long years, covering over half the length of the Solar System and looping around the Sun five times, the Rosetta spacecraft has finally arrived at its […]<\/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\/2014\/09\/comet_on_3_august_2014\/17888837-2-eng-GB\/Comet_on_3_August_2014.jpg","esa_banner_description":"","esa_banner_credit":"ESA\/Rosetta\/MPS for OSIRIS Team MPS\/UPD\/LAM\/IAA\/SSO\/INTA\/UPM\/DASP\/IDA","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2014\/09\/Comet_on_3_August_2014","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":[46,10,11],"tags":[],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-571","post","type-post","status-publish","format-standard","hentry","category-comets-and-meteors","category-learn","category-our-universe"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/posts\/571","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=571"}],"version-history":[{"count":1,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/posts\/571\/revisions"}],"predecessor-version":[{"id":1714,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/posts\/571\/revisions\/1714"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/media?parent=571"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/categories?post=571"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/tags?post=571"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/panel?post=571"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/language?post=571"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/age?post=571"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/duration?post=571"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/resource_type?post=571"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/audience?post=571"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/wf_post_folders?post=571"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}