{"id":22169,"date":"2026-11-06T20:51:00","date_gmt":"2026-11-06T16:51:00","guid":{"rendered":"https:\/\/eternos974.live\/?p=22169"},"modified":"2026-11-06T01:05:51","modified_gmt":"2026-11-05T21:05:51","slug":"reflect-orbital-eclairer-la-nuit-menace-lastronomie","status":"publish","type":"post","link":"https:\/\/eternos974.live\/index.php\/2026\/11\/06\/reflect-orbital-eclairer-la-nuit-menace-lastronomie\/","title":{"rendered":"Reflect Orbital : \u00e9clairer la nuit menace l\u2019astronomie"},"content":{"rendered":"<p>Reflect Orbital veut vendre de la lumi\u00e8re solaire r\u00e9fl\u00e9chie depuis l\u2019espace pendant la nuit. Mais le test du 10 octobre 2026 d\u00e9crit par Science &#038; Vie a eu lieu au sol, pr\u00e8s de Lone Pine, en Californie, avec des projecteurs utilis\u00e9s lors d\u2019un exercice de secours. Ce n\u2019\u00e9tait pas l\u2019essai en orbite d\u2019une constellation d\u00e9j\u00e0 op\u00e9rationnelle. La distinction change la lecture de toute l\u2019affaire : les effets du dispositif terrestre et ceux des futurs satellites ne sont pas des mesures interchangeables.<\/p>\n<p>Le m\u00e9dia rapporte que des autorit\u00e9s locales et la communaut\u00e9 scientifique n\u2019avaient pas \u00e9t\u00e9 pr\u00e9venues du test. Cette absence de notification rapport\u00e9e concerne l\u2019\u00e9v\u00e9nement au sol. Elle ne permet pas d\u2019affirmer qu\u2019aucun participant n\u2019\u00e9tait inform\u00e9 : une \u00e9quipe de secours avait \u00e9t\u00e9 invit\u00e9e \u00e0 l\u2019exercice.<\/p>\n<p><h2>Le projet orbital change d\u2019\u00e9chelle<\/h2>\n<p>Le prototype E\u00e4rendil-1 doit utiliser un miroir de 18 m\u00e8tres de c\u00f4t\u00e9 pour rediriger de la lumi\u00e8re vers une zone de la Terre. L\u2019entreprise affiche une ambition de 50 000 miroirs \u00e0 l\u2019horizon 2035. Ce calendrier et ce volume sont des objectifs commerciaux ; ils ne d\u00e9crivent pas un d\u00e9ploiement d\u00e9j\u00e0 r\u00e9alis\u00e9.<\/p>\n<p>Les travaux scientifiques cit\u00e9s examinent notamment la diffusion de cette lumi\u00e8re dans l\u2019atmosph\u00e8re et sa r\u00e9flexion sur le sol. Les effets ne s\u2019arr\u00eateraient donc pas n\u00e9cessairement au bord de la zone command\u00e9e par le client. Les valeurs de luminosit\u00e9 projet\u00e9es varient selon la taille et la configuration des r\u00e9flecteurs. Elles ne doivent pas \u00eatre confondues avec l\u2019\u00e9clairage observ\u00e9 lors du test californien.<\/p>\n<p><h2>Les astronomes observent plus loin que le point \u00e9clair\u00e9<\/h2>\n<p>Une \u00e9tude de l\u2019Observatoire europ\u00e9en austral examine les cons\u00e9quences possibles des grandes constellations, dont les miroirs de Reflect Orbital : lumi\u00e8re de fond, tra\u00een\u00e9es sur les images et pertes de temps d\u2019observation. Les effets d\u00e9pendent de la taille, du nombre et de l\u2019orbite des objets. Ils doivent \u00eatre pr\u00e9sent\u00e9s comme des projections scientifiques, distinctes des promesses de contr\u00f4le formul\u00e9es par l\u2019entreprise.<\/p>\n<p>L\u2019enjeu pratique est de savoir comment v\u00e9rifier les effets au-del\u00e0 de la seule zone \u00e9clair\u00e9e, qui publie les mesures et comment les observations des astronomes sont prises en compte. Le projet rend cette question concr\u00e8te : commander quelques minutes de lumi\u00e8re pour un endroit peut avoir des cons\u00e9quences sur le ciel vu depuis les alentours. Le formulaire de commande ne contient pas encore tous les futurs voisins.<\/p>\n<h2>Sources<\/h2>\n<ul>\n<li><a href=\"https:\/\/www.science-et-vie.com\/ciel-et-espace\/cest-comme-recevoir-une-balle-dans-la-tete-cest-la-fin-de-lastronomie-au-sol-lentreprise-qui-veut-eclairer-la-nuit-avec-des-miroirs-spatiaux-a-effe-265432.html\" target=\"_blank\" rel=\"nofollow noopener\">Source 1<\/a><\/li>\n<li><a href=\"https:\/\/cdn3.eso.org\/public\/france\/news\/eso2607\/\" target=\"_blank\" rel=\"nofollow noopener\">Source 2<\/a><\/li>\n<li><a href=\"https:\/\/www.sciencenews.org\/article\/reflect-orbital-space-mirrors-satellite\" target=\"_blank\" rel=\"nofollow noopener\">Source 3<\/a><\/li>\n<\/ul>\n<p>\u00c0 tr\u00e8s vite sur <a href=\"https:\/\/eternos974.live\" target=\"_blank\" rel=\"noopener\"><strong>l\u2019EternoStation<\/strong><\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Reflect Orbital a organis\u00e9 un test d\u2019\u00e9clairage au sol en Californie. Son projet de miroirs orbitaux inqui\u00e8te les astronomes par la lumi\u00e8re qu\u2019il diffuserait.<\/p>\n","protected":false},"author":1,"featured_media":22170,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"cybocfi_hide_featured_image":"","_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_hide_featured_image":false,"_jetpack_featured_image_duplicate_dismissed":0,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[393],"tags":[],"class_list":["post-22169","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-infos"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.5 - aioseo.com -->\n\t<meta name=\"description\" content=\"Reflect Orbital a organis\u00e9 un test d\u2019\u00e9clairage au sol en Californie. 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