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Son objectif principal est la détection des ondes gravitationnelles, oscillations dans l'espace-temps créées par des corps célestes dense et de très forte gravité – tels que les trous noirs -, \u0026nbsp;qui se déplacent en vitesse accélérée, comme le prédit la théorie de la relativité générale d'Albert Einstein. La mission donnera aux scientifiques une vision complètement nouvelle du cosmos en comparaison des techniques d'observation traditionnelles, et aidera probablement à dévoiler certains de ses nombreux mystères.\u003cbr\u003e\n\u0026nbsp;\u003cbr\u003e\nLISA consistera en une constellation de trois satellites évoluant en formation triangulaire, séparés par 2,5 millions de kilomètres, et qui suivront la Terre dans son orbite autour du Soleil. Chaque satellite embarquera deux masses de référence. Des faisceaux laser seront transmis entre les satellites pour mesurer le déplacement de ces masses avec une résolution dix fois plus petite qu'un atome. Thales Alenia Space dirigera la phase d'étude de faisabilité qui s'achèvera en janvier 2020. Ce contrat marque une étape majeure pour la mission LISA et confirme également le rôle clé traditionnel de Thales Alenia Space dans les nombreuses missions scientifiques clés en Europe.\u003cbr\u003e\n\u0026nbsp;\u003cbr\u003e\n\u003cem\u003e\u003cu\u003eDétails techniques\u003c/u\u003e\u003c/em\u003e\u003cbr\u003e\n\u003cstrong\u003e\u003cem\u003eLa phase A \u003c/em\u003e\u003c/strong\u003e\u003cem\u003ecomprend l'identification de la faisabilité de conception de la mission, la définition des bases de référence pour la sonde spatial et ses sous-systèmes, y compris les interfaces charge utile, l'évaluation de réalisation de la mission scientifique basée sur des analyses approfondies et la définition d'une feuille de route de développement.\u003c/em\u003e\u003cbr\u003e\n\u0026nbsp;\u003cbr\u003e\n\u003cstrong\u003e\u003cem\u003eLISA (Laser Interferometer Space Antenna)\u003c/em\u003e\u003c/strong\u003e\u003cem\u003e utilisera la même technique que deux autres programmes, LIGO (Laser Interferometer Gravitational-Wave Observatory) et Virgo (Observatoire Gravitationnel Européen) pour détecter les ondes gravitationnelles, à savoir mesurer le déplacement des masses de référence par interférométrie laser. Mais il étendra l'enveloppe d'observation dans le spectre de fréquence inférieure, inaccessible depuis le sol, et améliorera considérablement les capacités et la vérification\u003cstrong\u003e.\u003c/strong\u003e\u003c/em\u003e\u003cbr\u003e\n\u0026nbsp;\u003cbr\u003e\n\u0026nbsp;\u003cbr\u003e\n\u003cstrong\u003eA propos de Thales Alenia Space\u003c/strong\u003e\u003cbr\u003e\nCombinant plus de quarante ans d’expérience et une diversité unique en terme d’expertise, de talents et de cultures les architectes de Thales Alenia Space conçoivent et délivrent des solutions innovantes pour les télécommunications, la navigation, l’observation de la Terre et la gestion de l’environnement, l’exploration, les sciences et les infrastructures orbitales. Les institutions, gouvernements et entreprises comptent sur Thales Alenia Space afin de concevoir, réaliser et livrer\u0026nbsp; des systèmes satellitaires : pour géolocaliser et connecter les personnes et les objets partout dans le monde; pour observer notre Planète; pour optimiser l'utilisation des ressources de la Terre ainsi que celles de notre Système Solaire. Thales Alenia Space a la conviction que l’espace apporte une nouvelle dimension à l’humanité pour bâtir une vie meilleure et durable sur Terre. Société commune entre Thales (67%) et Leonardo (33 %), Thales Alenia Space forme la Space Alliance avec Telespazio pour proposer une offre complète de solutions incluant les services. Thales Alenia Space a réalisé un chiffre d'affaires de l’ordre de 2.4 milliards d’euros en 2016 et emploie 7980 personnes dans 9 pays. \u003ca href=\"http://www.thalesaleniaspace.com\"\u003ewww.thalesaleniaspace.com\u003c/a\u003e\u003cbr\u003e\n\u0026nbsp;\u003cbr\u003e\n\u003cbr\u003e\n\u003cstrong\u003eContacts Presse Thales Alenia Space :\u003c/strong\u003e\u003c/div\u003e\n\n\u003cdiv class=\"rtejustify\"\u003e\u003cbr\u003e\nSandrine Bielecki\u0026nbsp;\u0026nbsp; \u0026nbsp;\u003cbr\u003e\nPhone: +33 (0)4 92 92 70 94\u0026nbsp;\u0026nbsp; \u0026nbsp;\u003cbr\u003e\n\u003ca href=\"mailto:sandrine.bielecki@thalesaleniaspace.com\"\u003esandrine.bielecki@thalesaleniaspace.com\u003c/a\u003e\u003cbr\u003e\n\u003cbr\u003e\nChrystelle Dugimont\u003cbr\u003e\nPhone: +33 (0)4 92 92 74 06\u003cbr\u003e\n\u003ca href=\"mailto:chrystelle.dugimont@thalesaleniaspace.com\"\u003echrystelle.dugimont@thalesaleniaspace.com\u003c/a\u003e\u003c/div\u003e\n","blocks":[],"boxCarousel":{"slide":[]},"next":{"name":"Thales Alenia Space signe un accord de partenariat avec le centre technologique  polonais SCNTPL","url":"/fr/press-releases/thales-alenia-space-signe-un-accord-de-partenariat-avec-le-centre-technologique","image":{"src":"https://tas-static.thalesaleniaspace.com/cms/public/styles/241x143/public/2022-06/logo_tas_1600_433_2_48_1.jpg.webp?VersionId=4_WFoTvWffZJZBgGnejk5aD8X5Q9UL.P\u0026itok=zcseOAZC","alt":"TAS_1600 - Thalesgroup"}}},"seo":{"title":"A la découverte du mystère des ondes gravitationnelles et des trous noirs | Thales Alenia Space","image":{"media_image":{"url":{"_1920x1200":"https://www.thalesaleniaspace.com/assets/img/placeholders/1900x1200.jpg"}}},"description":"Thales Alenia Space remporte un contrat d\u0026#039;étude de l’ESA pour la mission LISA à la recherche de l’histoire de l’Univers","canonical":"https://www.thalesgroup.com/en/worldwide/space/press-release/discovering-mysteries-gravitational-waves-and-black-holes","desc":"Nous croyons que l'espace est le nouvel horizon de l'humanité pour construire une vie meilleure et durable sur Terre. 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