{"id":191,"date":"2021-12-02T12:46:55","date_gmt":"2021-12-02T11:46:55","guid":{"rendered":"https:\/\/kids.esa.int\/hubble_views_the_colourful_veil\/"},"modified":"2026-10-08T00:25:18","modified_gmt":"2026-10-07T22:25:18","slug":"hubble_views_the_colourful_veil","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/fr\/hubble_views_the_colourful_veil\/","title":{"rendered":"Un voile color\u00e9 sous l'\u0153il de Hubble"},"content":{"rendered":"
\n

Tout comme les \u00eatres vivants, les \u00e9toiles vieillissent et meurent. Mais les tr\u00e8s grosses \u00e9toiles ne s'\u00e9teignent pas sans faire de bruit. Elles partent dans un \u00e9norme bang. Apr\u00e8s l'explosion d'une supernova et l'\u00e9clat de lumi\u00e8re qu'elle provoque, il ne reste qu'une coque de gaz luisant qui fuit \u00e0 toute vitesse le site o\u00f9 l'\u00e9toile est morte<\/p>\n<\/div>\n

L'un des plus beaux exemples des restes d'une supernova est la N\u00e9buleuse du Voile, un anneau diffus de d\u00e9bris situ\u00e9 dans la constellation du Cygne. De nouvelles images prises par le t\u00e9lescope spatial Hubble, d\u00e9velopp\u00e9 conjointement par la NASA et l'ESA, montrent une vue remarquablement d\u00e9taill\u00e9e des restes \u00e9pars d'une \u00e9toile g\u00e9ante. Il ne reste que des volutes de gaz semblables \u00e0 de la fum\u00e9e.<\/p>\n

Les images de Hubble montrent des serpentins de gaz entrecrois\u00e9s dans trois segments de la N\u00e9buleuse. Ces filaments color\u00e9s proviennent de l'\u00e9nergie prodigieuse lib\u00e9r\u00e9e par les d\u00e9bris de l'explosion dans leur travers\u00e9e \u00e0 grande vitesse de l'espace environnant. Les ondes de choc cr\u00e9\u00e9es par un d\u00e9placement des gaz \u00e0 600 000 km\/h portent ces gaz \u00e0 une temp\u00e9rature atteignant plusieurs millions de degr\u00e9s.<\/p>\n

Les images de Hubble montrent deux caract\u00e9ristiques visibles bien distinctes : des filaments lin\u00e9aires bien nets et de larges nuages. Il s'agit en fait du m\u00eame ph\u00e9nom\u00e8ne vu sous des angles diff\u00e9rents. Les filaments correspondent \u00e0 la vue de profil d'un mince front d'onde de choc, les nuages \u00e0 une vue de face. Les couleurs sont dues \u00e0 la lumi\u00e8re provenant de diff\u00e9rents atomes excit\u00e9s par les ondes de choc : le bleu provient de l'oxyg\u00e8ne, le vert du soufre et le rouge de l'hydrog\u00e8ne.<\/p>\n

L'explosion de la supernova s'est produite il y a entre 5 000 et 10 000 ans, \u00e0 une \u00e9poque o\u00f9 nos anc\u00eatres auraient pu observer une augmentation soudaine de la luminosit\u00e9 de l'\u00e9toile, jusqu'\u00e0 ce qu'elle atteigne la luminosit\u00e9 d'un croissant de lune.<\/p>","protected":false},"excerpt":{"rendered":"

Like living things, stars grow old and die. But heavyweight stars don\u2019t fade away quietly. Instead, they go out with an enormous bang. All that remains after the brilliant light […]<\/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\/2007\/08\/uncovering_the_veil_nebula\/17905793-2-eng-GB\/Uncovering_the_Veil_Nebula.jpg","esa_banner_description":"Uncovering the Veil Nebula","esa_banner_credit":"NASA - ESA - Hubble Heritage (STScI\/AURA)-ESA\/Hubble Collaboration","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2007\/08\/Uncovering_the_Veil_Nebula","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":[2],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-191","post","type-post","status-publish","format-standard","hentry","category-learn","category-spacecraft","category-technology","tag-background-article"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/posts\/191","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=191"}],"version-history":[{"count":1,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/posts\/191\/revisions"}],"predecessor-version":[{"id":1334,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/posts\/191\/revisions\/1334"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/media?parent=191"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/categories?post=191"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/tags?post=191"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/panel?post=191"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/language?post=191"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/age?post=191"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/duration?post=191"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/resource_type?post=191"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/audience?post=191"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/wf_post_folders?post=191"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}