{"id":71274,"date":"2021-11-22T12:14:27","date_gmt":"2021-11-22T17:14:27","guid":{"rendered":"https:\/\/mayahtt.com\/?p=71274"},"modified":"2021-11-22T12:14:27","modified_gmt":"2021-11-22T17:14:27","slug":"decouvrez-logiciel-telescope-spatial-james-webb","status":"publish","type":"post","link":"https:\/\/www.mayahtt.com\/fr\/blog\/decouvrez-logiciel-telescope-spatial-james-webb\/","title":{"rendered":"Observer les galaxies : d\u00e9couvrez le logiciel derri\u00e8re le d\u00e9veloppement du t\u00e9lescope spatial James-Webb"},"content":{"rendered":"<p>Imaginez un t\u00e9lescope capable voir loin dans le temps, jusqu\u2019aux origines de l\u2019univers. Que r\u00e9v\u00e9lerait-il? La gen\u00e8se des galaxies et des \u00e9toiles? Les d\u00e9buts de la cr\u00e9ation?<\/p>\n<h4><strong>Le t\u00e9lescope spatial James-Webb (JWST) pourrait nous aider \u00e0 d\u00e9couvrir les origines de l\u2019univers<\/strong><\/h4>\n<p>D\u00e9passant les capacit\u00e9s du t\u00e9lescope spatial Hubble, les plus grandes longueurs d\u2019onde et la sensibilit\u00e9 accrue de Webb devraient ouvrir une fen\u00eatre sur la cr\u00e9ation de l\u2019univers. Les images du t\u00e9lescope nous permettront d\u2019observer les premi\u00e8res galaxies en formation et de jeter un coup d\u2019\u0153il \u00e0 l\u2019int\u00e9rieur des nuages de poussi\u00e8re o\u00f9 se cr\u00e9ent les futures \u00e9toiles et les syst\u00e8mes plan\u00e9taires.<\/p>\n<p>Le lancement tr\u00e8s attendu de l\u2019observatoire infrarouge orbital n\u2019est plus qu\u2019\u00e0 quelques semaines. Il est pr\u00e9vu pour le 18\u00a0d\u00e9cembre\u00a02021.<\/p>\n<h4><strong>Quelles technologies de pointe ont \u00e9t\u00e9 utilis\u00e9es pour d\u00e9velopper le t\u00e9lescope Webb?<\/strong><\/h4>\n<p>Une constellation de technologies ont \u00e9t\u00e9 utilis\u00e9es pour concevoir et construire le t\u00e9lescope James-Webb Parmi elles, des logiciels et des plateformes avanc\u00e9s ont \u00e9t\u00e9 d\u00e9velopp\u00e9s par <a href=\"https:\/\/new.siemens.com\/global\/en\/company\/stories\/industry\/software-is-key-for-deep-space-exploration.html\">Siemens Digital Industries Software.<\/a><\/p>\n<p>Joignez-vous \u00e0 nous pour <a href=\"https:\/\/jwst.nasa.gov\/content\/webbLaunch\/index.html\">explorer la technologie derri\u00e8re le d\u00e9veloppement du JWST<\/a> pendant le compte \u00e0 rebours jusqu\u2019\u00e0 la date du lancement.<\/p>\n<h4><strong>Solutions de conception de t\u00e9lescopes\u00a0: d\u00e9fis thermiques et essais pr\u00e9liminaires par simulation<\/strong><\/h4>\n<p>Le projet est une collaboration internationale impliquant un partenariat avec 14\u00a0pays et des milliers de scientifiques du gouvernement, du milieu universitaire et du secteur priv\u00e9.<\/p>\n<h4><strong>Maintenir une temp\u00e9rature de fonctionnement optimale<\/strong><\/h4>\n<p>L\u2019<a href=\"https:\/\/www.jwst.nasa.gov\/content\/observatory\/sunshield.html\">\u00e9cran solaire <\/a>joue certains r\u00f4les li\u00e9s \u00e0 la r\u00e9gulation de la temp\u00e9rature. Il fournit un environnement thermique stable qui prot\u00e8ge le t\u00e9lescope de la chaleur et de la lumi\u00e8re du soleil, de la lune et de la Terre, ainsi que des \u00e9missions de chaleur de la plateforme de satellite. La diff\u00e9rence de temp\u00e9rature entre le c\u00f4t\u00e9 froid de l\u2019observatoire et le c\u00f4t\u00e9 chaud est d\u2019environ 600\u00a0\u00b0F.<\/p>\n<p>La cl\u00e9 du fonctionnement du t\u00e9lescope est sa grande sensibilit\u00e9 \u00e0 la lumi\u00e8re infrarouge. Le \u00ab\u00a0bruit\u00a0\u00bb de fond thermique provenant de toute autre source de chaleur d\u00e9tectable perturberait les op\u00e9rations. La conception de l\u2019engin spatial permettra de maintenir les composants et les instruments aux temp\u00e9ratures incroyablement froides n\u00e9cessaires. Un syst\u00e8me de refroidissement passif maintiendra les instruments pr\u00e8s de l\u2019infrarouge \u00e0 environ 39\u00a0kelvins (-234\u00a0\u00b0C ou -389\u00a0\u00b0F) et un syst\u00e8me de cryorefroidissement maintiendra l\u2019instrument infrarouge moyen (MIRI) \u00e0 7\u00a0kelvins (-266\u00a0\u00b0C ou\u00a0-447\u00a0\u00b0F).<\/p>\n<p>Les mat\u00e9riaux utilis\u00e9s dans l\u2019\u00e9cran solaire doivent \u00eatre capables de r\u00e9sister \u00e0 des temp\u00e9ratures extr\u00eames sans \u00eatre endommag\u00e9s, que ce soit en raison d\u2019une rigidit\u00e9 ou d\u2019un ramollissement d\u00fb \u00e0 la temp\u00e9rature.<\/p>\n<blockquote><p><a href=\"https:\/\/mayahtt.com\/fr\/products\/nx-cad\/\">NX\u00a0<\/a>et\u00a0<a href=\"https:\/\/mayahtt.com\/fr\/products\/teamcenter\/\">Teamcenter\u00a0<\/a>ont \u00e9t\u00e9 utilis\u00e9s pour concevoir, simuler et fabriquer le module MIRI.<\/p><\/blockquote>\n<h4><strong>Une approche incr\u00e9mentale et pr\u00e9coce des essais<\/strong><\/h4>\n<p>Les le\u00e7ons tir\u00e9es du t\u00e9lescope Hubble ont contribu\u00e9 \u00e0 la d\u00e9cision d\u2019adopter une approche progressive des essais. L\u2019ajout de contr\u00f4les ind\u00e9pendants \u00e0 chaque \u00e9tape de l\u2019assemblage r\u00e9duira les chances de rencontrer des probl\u00e8mes lors de l\u2019essai final du syst\u00e8me.<\/p>\n<blockquote><p>\u00ab\u00a0Chaque composant qui fonctionne \u00e0 des temp\u00e9ratures cryog\u00e9niques est mod\u00e9lis\u00e9 et test\u00e9 pour confirmer que sa r\u00e9action \u00e0 des temp\u00e9ratures extr\u00eamement froides est bien comprise.\u00a0\u00bb<\/p>\n<p>Source\u00a0: <a href=\"https:\/\/www.reddit.com\/r\/science\/comments\/77dwwk\/we_are_scientists_and_engineers_testing_nasas\/\">Reddit.com AMA<\/a><\/p><\/blockquote>\n<p>Tester le plus t\u00f4t possible est rentable et efficace en termes de temps, ce qui permet de r\u00e9soudre un plus grand nombre de probl\u00e8mes qui pourraient survenir. La simulation joue un r\u00f4le important, car elle permet de tester et de v\u00e9rifier les conceptions dans des environnements \u00ab\u00a0impossibles\u00a0\u00bb sans le co\u00fbt des prototypes physiques.<\/p>\n<blockquote><p>Femap a aid\u00e9 la NASA \u00e0 simuler les performances des composants du t\u00e9lescope spatial James-Webb. Lisez l\u2019article ici (en anglais seulement)\u00a0:\u00a0<a href=\"https:\/\/www.plm.automation.siemens.com\/global\/fr\/our-story\/customers\/nasa-goddard-space-flight-center\/16210\/\"><em>Using Femap helps NASA develop next-generation space telescope<\/em><\/a>.<\/p><\/blockquote>\n<h4><strong>All\u00e8gement<\/strong><\/h4>\n<p>Le miroir principal de Webb est d\u2019une taille incroyable de 6,5\u00a0m (21\u00a0pi et 4\u00a0po), soit plus de deux fois le diam\u00e8tre du miroir de Hubble. Il doit \u00eatre aussi grand pour pouvoir mesurer la lumi\u00e8re des galaxies lointaines. Au total, Webb a la taille d\u2019un immeuble de trois \u00e9tages.<\/p>\n<p>L\u2019\u00e9quipe de conception ne pouvait pas simplement construire une version plus grande du miroir de Hubble, car il aurait \u00e9t\u00e9 beaucoup trop lourd et trop grand pour \u00eatre lanc\u00e9 dans l\u2019espace. Elle a d\u00fb tester divers mat\u00e9riaux et a opt\u00e9 pour le b\u00e9ryllium afin de r\u00e9duire la masse de chaque segment du miroir \u00e0 20\u00a0kg (46\u00a0lb), soit un dixi\u00e8me de la masse unitaire du miroir de Hubble, tout en conservant la r\u00e9sistance n\u00e9cessaire.<\/p>\n<h4><strong>D\u00e9couvrez comment Maya HTT contribue \u00e0 l\u2019avancement de la technologie spatiale<\/strong><\/h4>\n<p><a href=\"https:\/\/mayahtt.com\/fr\/blog\/logiciel-dessais-dexcitation-de-base-sinusoidale-tres-performant\/\">Essais virtuels d\u2019excitation vibratoire des structures\u00a0&#8211; Maya HTT<\/a><\/p>\n<p><a href=\"https:\/\/mayahtt.com\/fr\/blog\/essais-de-systemes-bases-sur-des-modeles-dengin-spatial-correlation-des-essais-et-des-simulations\/\">Essais de syst\u00e8mes bas\u00e9s sur des mod\u00e8les d\u2019engin spatial &#8211; Maya HTT<\/a><\/p>\n<p><a href=\"https:\/\/mayahtt.com\/fr\/blog\/simulating-to-the-moon-and-mars\/\">Simuler l\u2019exploration sur la Lune et Mars &#8211; Maya HTT<\/a><\/p>\n<h4><strong>En savoir plus sur le t\u00e9lescope Webb (NASA)<\/strong><\/h4>\n<p><a href=\"https:\/\/jwst.nasa.gov\/content\/about\/faqs\/faq.html\">FAQ de la NASA sur le t\u00e9lescope Webb<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Imaginez un t\u00e9lescope capable voir loin dans le temps, jusqu\u2019aux origines de l\u2019univers. Que r\u00e9v\u00e9lerait-il? La gen\u00e8se des galaxies et des \u00e9toiles? Les d\u00e9buts de la cr\u00e9ation? Le t\u00e9lescope spatial James-Webb (JWST) pourrait nous aider \u00e0 d\u00e9couvrir les origines de l\u2019univers D\u00e9passant les capacit\u00e9s du t\u00e9lescope spatial Hubble, les plus grandes longueurs d\u2019onde et la [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":71254,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"gallery","meta":{"_et_pb_use_builder":"off","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[302,559,560,303,10],"tags":[],"class_list":["post-71274","post","type-post","status-publish","format-gallery","has-post-thumbnail","hentry","category-actualites","category-articles-fr-fr","category-articles-fr-2","category-blogue","category-non-classifiee","post_format-post-format-gallery"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Le t\u00e9lescope spatial James-Webb, un logiciel d\u2019exploration spatiale - 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