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class=\"text-align-justify\"\u003e\u003cb\u003eCannes, le 05 mai 2026 \u003c/b\u003e– Thales Alenia Space, société conjointe entre Thales (67\u0026nbsp;%) et Leonardo (33\u0026nbsp;%), annonce la signature d’un contrat de 26,1 millions d’euros avec l’Agence spatiale européenne (ESA) pour la phase 1 du développement des télescopes de la mission LISA (Laser Interferometer Space Antenna). Constituée de 3 satellites, la mission LISA sera le premier observatoire spatial européen en capacité de détecter et d’étudier les ondes gravitationnelles émises par des événements cosmiques extrêmes.\u003c/p\u003e\n\n\u003cp class=\"text-align-justify\"\u003eCette nouvelle annonce fait suite à l’officialisation de deux autres contrats relatifs à cette même mission. En juin 2025, Thales Alenia Space avait en effet annoncé un contrat avec le maître d’œuvre, OHB System AG, portant sur la fourniture de plusieurs éléments clés de la mission, dont l’avionique et le logiciel de contrôle des satellites, le système de télécommunications et le système de contrôle d’attitude et de compensation de traînée DFACS (Drag-Free and Attitude Control System). En janvier 2026, l’entreprise avait également été retenue par OHB System AG pour la fourniture du sous-système de propulsion.\u003c/p\u003e\n\n\u003cp class=\"text-align-justify\"\u003e\u003cb\u003eL’excellence optique de Thales Alenia Space au service de l’exploration spatiale \u003c/b\u003e\u003c/p\u003e\n\n\u003cfigure role=\"group\" class=\"caption caption-drupal-media\"\u003e\n\u003carticle class=\"media media--type-immagine media--view-mode-full\"\u003e\n  \n      \n            \u003cdiv class=\"field field--name-field-media-image field--type-image field--label-hidden field__item\"\u003e  \u003cimg loading=\"lazy\" src=\"https://tas-static.thalesaleniaspace.com/cms/public/thales_images/lisa-mission-c-ohb_0.jpg?VersionId=oRTkTXDF.0IQCWsuBg6YTEiWIawHZjK_\" width=\"1500\" height=\"843\" alt=\"lisa-mission-c-ohb.jpg\"\u003e\n\n\u003c/div\u003e\n      \n  \u003c/article\u003e\n\n\u003cfigcaption\u003e©OHB\u003c/figcaption\u003e\n\u003c/figure\u003e\n\n\n\u003cp class=\"text-align-justify\"\u003eEn France, Thales Alenia Space et Thales SESO®, responsables du développement des télescopes de la charge utile optique, apporteront une contribution majeure à la mission LISA.\u0026nbsp;\u003c/p\u003e\n\n\u003cp class=\"text-align-justify\"\u003eForte de son expertise mondialement reconnue dans la conception et la fabrication de technologies optiques avancées, Thales Alenia Space a été sélectionnée par l’Agence spatiale européenne (ESA) pour mener à bien la phase 1 du développement des six télescopes de la mission LISA, qui se déroulera potentiellement en trois phases. Au titre de maître d’œuvre, Thales Alenia Space assumera la responsabilité du développement des télescopes, de la conception, de l’assemblage ainsi que des tests. La réalisation des six télescopes intégralement constitués de Zerodur® fera l’objet d’un défi technologique inédit.\u003c/p\u003e\n\n\u003cp class=\"text-align-justify\"\u003eSeules les expertises couplées, de conception et de fabrication de Thales SESO® et Thales Alenia Space, ainsi que la très faible sensibilité aux environnements thermiques du Zerodur®, permettront d’atteindre les stabilités (picomètre) requises par la mission LISA.\u003c/p\u003e\n\n\u003cp class=\"text-align-justify\"\u003eDans le cadre de ce premier contrat de développement, Thales Alenia Space pourra compter sur l’expertise de longue date de Thales SESO®, principal fournisseur européen de miroirs ultra légers en Zerodur®.\u003cbr\u003e\nThales SESO® sera en effet responsable de l’approvisionnement, de l’usinage et du polissage des optiques et de la structure. Par ailleurs, l’assemblage des télescopes, l’alignement des optiques ainsi que les essais d’environnement et de performances seront gérés conjointement par Thales Alenia Space et Thales SESO®.\u003cbr\u003e\nAvec plus de 200 miroirs Zerodur® fabriqués et actuellement en orbite, Thales SESO® figure parmi les leaders mondiaux en matière de précision des surfaces optiques obtenue par polissage, avec une précision de 0,2 nanomètre atteinte sur la surface de 230 mm de diamètre pour les miroirs destinés à Virgo (le détecteur européen d'ondes gravitationnelles au sol), un niveau de précision inestimable pour la mission LISA.\u003c/p\u003e\n\n\u003cblockquote\u003e\n\u003cp class=\"text-align-justify\"\u003e«\u0026nbsp;LISA est une initiative pionnière dans les domaines de l’astrophysique et de l’exploration spatiale qui n’a encore jamais été tentée. Thales Alenia Space est responsable de plusieurs composants essentiels à la mission LISA. Je suis ravi d’étendre notre collaboration avec Thales Alenia Space à la première phase du développement des télescopes, ce qui permettra de réduire considérablement les risques liés à ce défi technologique. Thales Alenia Space s’associera à Thales SESO®, l’un des principaux fournisseurs européens de miroirs ultra légers en Zerodur®. J’ai hâte de voir les premiers résultats de ce développement d’ici la fin de l’année », a déclaré Filippo Marliani, chef de projet LISA à l’ESA.\u003c/p\u003e\n\u003c/blockquote\u003e\n\n\u003cblockquote\u003e\n\u003cp class=\"text-align-justify\"\u003e« Nous sommes très fiers de faire partie intégrante de cette mission exceptionnelle vouée à l’étude des ondes gravitationnelles depuis l’espace et tenions à remercier l’ESA pour sa confiance\u0026nbsp;renouvelée » a déclaré Bertrand Denis, Vice-Président des activités Observation, Science et Exploration chez Thales Alenia Space en France. «\u0026nbsp;Le développement de ces télescopes est en totale adéquation avec les compétences cœur de Thales Alenia Space et Thales SESO® sur l’instrumentation optique de haute performance. Notre capacité de production d’instruments en série sera également un facteur déterminant dans le cadre de la réussite du projet.\u0026nbsp;»\u003c/p\u003e\n\u003c/blockquote\u003e\n\n\u003cp class=\"text-align-justify\"\u003e\u003cb\u003eLISA\u0026nbsp;: le premier observatoire spatial d’étude des ondes gravitationnelles \u003c/b\u003e\u003c/p\u003e\n\n\u003cp class=\"text-align-justify\"\u003eLISA (Laser Interferometer Space Antenna) est une mission d’exploration spatiale inédite de l'Agence spatiale européenne (ESA) visant à détecter les ondes gravitationnelles directement depuis l'espace.\u003cbr\u003e\nCet observatoire spatial permettra de détecter les plus infimes distorsions de l’espace-temps produites par les ondes gravitationnelles générées par l’accélération d’objets massifs, comme le prédisait la théorie de la relativité générale d’Albert Einstein en 1916, avec une sensibilité et dans une gamme de fréquences très faible (entre 0,1 mHz et 100 mHz), inaccessible aux moyens de mesure terrestres existants tels que LIGO aux Etats-Unis et VIRGO en Europe, en raison de leur taille limitée et des perturbations sismiques.\u003cbr\u003e\n\u003cbr\u003e\nLa mission LISA ouvrira une fenêtre unique sur la compréhension de l’univers primordial ayant précédé la formation des étoiles et des galaxies, ainsi que sur des phénomènes célestes allant de l’interaction d’étoiles compactes à la fusion de trous noirs supermassifs au centre des galaxies.\u003c/p\u003e\n\n\u003cp class=\"text-align-justify\"\u003eLISA se compose d'une constellation de trois satellites, espacés chacun de 2,5 millions de kilomètres, formant un triangle équilatéral et emportant chacun deux masses d’épreuve. Ces trois satellites sont reliés entre eux par six faisceaux laser, constituant ainsi un immense interféromètre optique. Ces faisceaux laser inter-satellites mesureront le déplacement de ces masses avec une précision de l’ordre du picomètre (plus petit qu’un atome).\u003cbr\u003e\n\u003cbr\u003e\nLes satellites de la mission LISA bénéficient de l’expérience acquise lors du programme LISA Pathfinder, lancé en 2015, qui a permis de démontrer avec succès la capacité de maintenir des masses d’épreuve à l’état de «\u0026nbsp;chute libre\u0026nbsp;» avec un niveau de précision exceptionnel. Le même système de propulsion de précision, également utilisé pour les missions Gaia et Euclid de l’ESA, garantira que chaque satellite garde les faisceaux des interféromètres laser pointés vers les autres satellites avec la plus grande précision.\u003c/p\u003e\n\n\u003cp class=\"text-align-justify\"\u003eLISA mettra donc en œuvre des techniques de mesure avancées par interférométrie laser afin d’étudier des phénomènes astrophysiques impliquant des systèmes massifs et lointains, offrant ainsi des perspectives d’exploration et de compréhension de notre univers inédites. Le lancement des trois satellites est prévu en 2035 à bord d’Ariane 6.\u003cbr\u003e\n\u003ca name=\"_Hlk226110165\"\u003e\u003c/a\u003e\u003cbr\u003e\n\u003cb\u003eLa contribution globale de Thales Alenia Space à la mission LISA \u003c/b\u003e\u003c/p\u003e\n\n\u003cp class=\"text-align-justify\"\u003eThales Alenia Space en Italie fournira au maître d’œuvre, OHB System AG, plusieurs éléments clés de cette mission, dont l’avionique et le logiciel de contrôle des satellites, le système de télécommunications et le système de contrôle d’attitude et de compensation de traînée DFACS (Drag-Free and Attitude Control System). La coentreprise sera responsable de la conception, de la fabrication, de l’assemblage du système, de l’intégration et des essais relatifs au sous-système de propulsion de la mission LISA. Thales Alenia Space est également responsable d’assurer l’environnement opérationnel exceptionnel de la charge utile en termes d’électromagnétisme, de rayonnement et de gravité propre, indispensable au succès de la mission, pour laquelle Thales Alenia Space gère en outre les budgets.\u003cbr\u003e\n\u003cbr\u003e\nEn tant que membre de la «\u0026nbsp;LISA Core Team\u0026nbsp;», Thales Alenia Space à Turin, en Italie, bénéficie de l’expérience et des solutions conceptuelles héritées de la phase d’étude de cinq ans qui a été menée sous la maîtrise d’œuvre de Thales Alenia Space. Notre site italien de Gorgonzola développe l’ordinateur de bord et la mémoire de masse dans la même unité intégrée. Au Royaume-Uni, Thales Alenia Space fournit le système de propulsion tandis que la France est en charge du développement des télescopes aux côtés de Thales SESO®. En Suisse, Thales Alenia Space développe une partie de l’électronique de l’instrument et du système CAS de LISA.\u003cbr\u003e\n\u003cbr\u003e\nLeonardo contribue également à la mission LISA en fournissant certains équipements majeurs, tels que les grappes de micropropulseurs permettant de contrôler très précisément l’attitude des satellites.\u003cbr\u003e\nD’autres sites de l’entreprise auront par ailleurs l’occasion de contribuer à cette mission en fournissant divers sous-systèmes ou équipements des satellites.\u003c/p\u003e\n\n\u003cp class=\"text-align-justify\" aria-hidden=\"true\"\u003e\u0026nbsp;\u003c/p\u003e\n\n\u003cp class=\"text-align-justify\"\u003e\u003cb\u003eÀ propos de THALES ALENIA SPACE\u003c/b\u003e\u003c/p\u003e\n\n\u003cp class=\"text-align-justify\"\u003eThales Alenia Space s'appuie sur une combinaison unique de compétences, d'expertise technologique et de capacités industrielles pour fournir des solutions innovantes dans les domaines des télécommunications, de la navigation, de l'observation de la Terre, de la défense, de l'exploration spatiale, des sciences et des infrastructures orbitales, en s'appuyant sur un savoir-faire éprouvé de plus de 50 ans. Les institutions, gouvernements et entreprises comptent sur Thales Alenia Space afin de concevoir et réaliser des systèmes satellitaires : pour géolocaliser et connecter les personnes et les objets à travers le monde ; observer notre Planète ; optimiser l'utilisation des ressources de la Terre, celles de notre Système solaire et découvrir les mystères de l'univers. A l’image de sa raison d’être « Space For Life », 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, comme au-delà. Société commune entre Thales (67 %) et Leonardo (33 %), Thales Alenia Space forme également la Space Alliance avec Telespazio afin de proposer une offre complète de solutions, incluant les services. Thales Alenia Space a réalisé un chiffre d'affaires de 2,36 milliards d'euros en 2025 et emploie plus de 8 000 personnes dans 7 pays, avec 14 sites en Europe.\u0026nbsp; #spaceforlife. www.thalesaleniaspace.com\u003c/p\u003e\n\n\u003cp class=\"text-align-justify\" aria-hidden=\"true\"\u003e\u0026nbsp;\u003c/p\u003e\n","blocks":[],"boxCarousel":{"slide":[]},"next":{"name":"Thales Alenia Space, Airbus Defence and Space et RADMOR unissent leurs efforts pour développer un nouveau satellite de télécommunications militaires au profit de la Pologne","url":"/fr/press-releases/thales-alenia-space-airbus-defence-and-space-et-radmor-unissent-leurs-efforts-pour","image":{"src":"https://tas-static.thalesaleniaspace.com/cms/public/styles/241x143/public/thales_images/img-20260420-wa0020.jpg.webp?VersionId=U4hIBIoakeX98QfX8bSPz8txI6yl1EvD\u0026itok=e9BVU36h","alt":"Signature_Poland"}}},"seo":{"desc":"Thales Alenia Space annonce la signature d’un contrat de 26,1 millions d’euros avec l’Agence spatiale européenne (ESA) pour la phase 1 du développement des télescopes de la mission LISA (Laser Interferometer Space Antenna). 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