{"id":85298,"date":"2024-04-24T17:48:07","date_gmt":"2024-04-24T17:48:07","guid":{"rendered":"https:\/\/www.africa-press.net\/burkina-faso\/politique\/voile-solaire-de-la-nasa-redecouvrez-son-lancement-en-replay"},"modified":"2024-04-24T19:50:46","modified_gmt":"2024-04-24T19:50:46","slug":"voile-solaire-de-la-nasa-redecouvrez-son-lancement-en-replay","status":"publish","type":"post","link":"https:\/\/www.africa-press.net\/burkina-faso\/toutes-les-actualites\/voile-solaire-de-la-nasa-redecouvrez-son-lancement-en-replay","title":{"rendered":"Voile solaire de la Nasa : (re)d\u00e9couvrez son lancement en replay"},"content":{"rendered":"

Africa-Press – Burkina Faso. <\/strong><\/span>Propulse\u0301e par la lumie\u0300re. C’est le principe de la voile solaire qui sera teste\u0301e par la Nasa prochainement: le satellite qui la contient a e\u0301te\u0301 expe\u0301die\u0301 en orbite dans la nuit du 23 au 24 avril 2024, tandis que la voile sera de\u0301ploye\u0301e environ deux mois plus tard. L’objectif e\u0301tant de tester sa stabilite\u0301 et sa capacite\u0301 a\u0300, effectivement, servir de moyen de propulsion pour des missions de plus longues distances dans le syste\u0300me solaire.<\/p>\n

La voile solaire ou comment utiliser la lumie\u0300re pour se de\u0301placer<\/b><\/p>\n

Le principe de la voile solaire est simple et il a e\u0301te\u0301 largement exploite\u0301 par les auteurs de science-fiction avant que les agences spatiales ne s’y mettent elles aussi. Il s’agit de profiter de la source d’e\u0301nergie quasi infinie offerte par le Soleil pour ge\u0301ne\u0301rer une acce\u0301le\u0301ration faible mais continue afin de parcourir de grandes distances, voire de gagner d’autres galaxies, comme l’avait imagine\u0301 le ce\u0301le\u0300bre astrophysicien Stephen Hawking avec son projet Breakthrough Starshot.<\/p>\n

Pour cette mission de la Nasa, l’objectif sera plus modeste: il consistera \u00ab\u00a0en une se\u0301rie de man\u0153uvres de pointage pour de\u0301montrer l’e\u0301le\u0301vation et l’abaissement de l’orbite, en utilisant uniquement la pression de la lumie\u0300re solaire agissant sur la voile\u00a0\u00bb, explique la Nasa.<\/p>\n

Cette voile, l’Advanced Composite Solar Sail System ou ACS3, est empaquete\u0301e dans un nanosatellite qui sera propulse\u0301 a\u0300 950 km d’altitude, soit deux fois plus haut que la station spatiale internationale. C’est seulement a\u0300 cette altitude qu’il sera possible d’e\u0301valuer l’effet de la pression de radiation solaire sur la voile, cette dernie\u0300re est a\u0300 peine e\u0301quivalente a\u0300 celle d’un trombone pose\u0301 sur la paume de la main, explique l’Agence spatiale ame\u0301ricaine. Apre\u0300s environ deux mois de tests, le satellite de\u0301ploiera la voile qui fait 80 me\u0300tres carre\u0301s. Celle-ci sera e\u0301prouve\u0301e durant une semaine sous la surveillance de came\u0301ras installe\u0301es sur le satellite.<\/p>\n

Fene\u0302tre de lancement ouverte ce soir<\/b><\/p>\n

L’ACS3 a e\u0301te\u0301 lance\u0301e depuis la Nouvelle-Ze\u0301lande sur une fuse\u0301e Electron de la socie\u0301te\u0301 Rocket Lab. La fuse\u0301e a de\u0301colle\u0301 du complexe de lancement 1, au sud de la pe\u0301ninsule de Ma\u0304hia.<\/p>\n

Un autre satellite, NEONSAT-1 (New-space Earth Observation Satellite), sera e\u0301galement mis en orbite au cours de la me\u0302me mission. Celui-ci est le premier d’une constellation d’engins dote\u0301s de came\u0301ras optiques haute re\u0301solution, destine\u0301es a\u0300 observer l’e\u0301volution de catastrophes naturelles sur la pe\u0301ninsule core\u0301enne.<\/p>\n

Pour plus d’informations et d’analyses sur la Burkina Faso<\/a>, suivez Africa-Press<\/a><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"

Africa-Press – Burkina Faso. Propulse\u0301e par la lumie\u0300re. C’est le principe de la voile solaire qui sera teste\u0301e par la Nasa prochainement: le satellite qui la contient a e\u0301te\u0301 expe\u0301die\u0301 en orbite dans la nuit du 23 au 24 avril 2024, tandis que la voile sera de\u0301ploye\u0301e environ deux mois plus tard. L’objectif e\u0301tant de […]<\/p>\n","protected":false},"author":82,"featured_media":85297,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22,10],"tags":[111,725,29],"class_list":["post-85298","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-divers","category-toutes-les-actualites","tag-africa-press","tag-africa-press-burkina-faso","tag-burkina-faso"],"yoast_head":"\nVoile solaire de la Nasa : (re)d\u00e9couvrez son lancement en replay - Burkina Faso<\/title>\n<meta name=\"description\" content=\"Propulse\u0301e par la lumie\u0300re. 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