{"id":5825,"date":"2016-05-29T06:50:27","date_gmt":"2016-05-29T06:50:27","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=5825"},"modified":"2016-06-06T15:35:58","modified_gmt":"2016-06-06T15:35:58","slug":"lhypertelescope-instrument-voir-grand-loin","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2016\/05\/29\/lhypertelescope-instrument-voir-grand-loin\/","title":{"rendered":"L’Hypert\u00e9lescope, un instrument pour voir grand et loin"},"content":{"rendered":"

Une \u00e9quipe de passionn\u00e9s installe depuis quelques ann\u00e9es dans une vall\u00e9e des Alpes de Haute-Provence un instrument \u00e9tonnant, l’Hypert\u00e9lescope.<\/strong><\/p>\n

Ils sont 24 (scientifiques, enseignants, chercheurs, ing\u00e9nieurs, astronomes amateurs, \u00e9tudiants…) r\u00e9unis autour d’un projet un peu fou, l’Hypert\u00e9lescope<\/a>, sous la direction d\u2019Antoine Labeyrie et Denis Mourard.<\/p>\n

Le premier, professeur \u00e9m\u00e9rite au Coll\u00e8ge de France <\/a>aujourd’hui \u00e0 la retraite, est un sp\u00e9cialiste des techniques d’interf\u00e9rom\u00e9trie optique qu’il a d\u00e9velopp\u00e9es au CERGA<\/a> (Centre d\u2019\u00c9tude et de Recherches en G\u00e9odynamique et Astronomie) dans les ann\u00e9es 1970. Il a re\u00e7u de nombreuses distinctions et un ast\u00e9ro\u00efde, (8788) Labeyrie, porte son nom.<\/p>\n

Le second est astronome \u00e0 l’Observatoire de la C\u00f4te d’Azur<\/a> et a d\u00e9velopp\u00e9 l’instrument VEGA (Visible spEctroGraph and polArimeter<\/em>) qui \u00e9quipe le grand interf\u00e9rom\u00e8tre CHARA (Center for High Angular Resolution Astronomy<\/em>) \u00e0 l’Observatoire du mont Wilson<\/a> en Californie.<\/p>\n

\"hypertelescope\"<\/a><\/p>\n

On sait depuis longtemps que c’est le diam\u00e8tre d’un t\u00e9lescope qui conditionne son pouvoir s\u00e9parateur (les plus fins d\u00e9tails qu’il permet de discerner) et sa capacit\u00e9 \u00e0 d\u00e9tecter des objets tr\u00e8s faiblement lumineux. C’est pour cette raison que l’on imagine des t\u00e9lescopes de plus en plus grands comme l’E-ELT<\/a> (European Extremely Large Telescope<\/em>). Cet instrument dont le miroir segment\u00e9 aura 39 m de diam\u00e8tre est actuellement en construction pour le compte de l’ESO<\/a> au sommet du Cerro Armazones<\/em>, une montagne qui culmine \u00e0 3.000 m\u00e8tres d\u2019altitude dans le d\u00e9sert d\u2019Atacama au nord du Chili.<\/p>\n

Connaissant le prix exorbitant d’un tr\u00e8s grand t\u00e9lescope, Antoine Labeyrie a imagin\u00e9 il y a une vingtaine d’ann\u00e9es de remplacer son grand miroir par une multitude de petits miroirs install\u00e9s dans une cuvette naturelle en concentrant les diff\u00e9rents faisceaux lumineux de ces petits miroirs vers un dispositif suspendu au-dessus dans une nacelle (voir le dessin plus haut).<\/p>\n

C’est le principe de l’Hypert\u00e9lescope actuellement en cours de d\u00e9veloppement \u00e0 2.\u2009000 m d’altitude dans un vallon de la vall\u00e9e de l’Ubaye (Alpes de Haute-Provence), un projet que chacun peut soutenir en participant \u00e0 la campagne de crowdfunding<\/em> 2016<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"

Une \u00e9quipe de passionn\u00e9s installe depuis quelques ann\u00e9es dans une vall\u00e9e des Alpes de Haute-Provence un instrument \u00e9tonnant, l’Hypert\u00e9lescope. Ils sont 24 (scientifiques, enseignants, chercheurs, ing\u00e9nieurs, astronomes amateurs, \u00e9tudiants…) r\u00e9unis autour d’un projet un peu fou, l’Hypert\u00e9lescope, sous la direction d\u2019Antoine Labeyrie et Denis Mourard. Le premier, professeur \u00e9m\u00e9rite au Coll\u00e8ge de France aujourd’hui \u00e0 … Continuer la lecture de L’Hypert\u00e9lescope, un instrument pour voir grand et loin<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":8,"featured_media":5826,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[87],"tags":[1666,1670,1669,1668,1667,632,633,1665,1671,1594],"class_list":["post-5825","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-les-hommes-et-le-ciel","tag-antoine-labeyrie","tag-cerga","tag-college-de-france","tag-crowdfunding","tag-denis-mourard","tag-e-elt","tag-eso","tag-hypertelescope","tag-observatoire-de-la-cote-dazur","tag-observatoire-du-mont-wilson"],"yoast_head":"\nL'Hypert\u00e9lescope, un instrument pour voir grand et loin<\/title>\n<meta name=\"description\" content=\"Une \u00e9quipe de passionn\u00e9s 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