{"id":48202,"date":"2025-04-24T03:45:12","date_gmt":"2025-04-24T03:45:12","guid":{"rendered":"https:\/\/www.europesays.com\/fr\/48202\/"},"modified":"2025-04-24T03:45:12","modified_gmt":"2025-04-24T03:45:12","slug":"la-sonde-lucy-devoile-le-premier-portrait-de-lasteroide-donaldjohanson","status":"publish","type":"post","link":"https:\/\/www.europesays.com\/fr\/48202\/","title":{"rendered":"La sonde Lucy d\u00e9voile le premier portrait de l\u2019ast\u00e9ro\u00efde Donaldjohanson"},"content":{"rendered":"

D\u00c9CRYPTAGE <\/strong>– Le vaisseau de la Nasa a profit\u00e9 de son voyage vers l\u2019orbite de Jupiter pour faire une image de cet objet situ\u00e9 dans la ceinture d\u2019ast\u00e9ro\u00efdes.<\/p>\n

En 1974, le pal\u00e9oanthropologue am\u00e9ricain Donald Johanson faisait la d\u00e9couverte en \u00c9thiopie du fossile de\u00a0Lucy<\/a>, une australopith\u00e8que vieille de 3,2\u00a0millions d\u2019ann\u00e9es qui r\u00e9volutionnait l\u2019histoire de l\u2019humanit\u00e9 en d\u00e9montrant que la bip\u00e9die \u00e9tait bien plus ancienne que pr\u00e9vu. Cinquante ans plus tard, c\u2019est au tour de Lucy de d\u00e9couvrir Donaldjohanson. \u00c0 cette diff\u00e9rence que dans cette nouvelle aventure scientifique, Lucy n\u2019est pas un hominine mais une sonde spatiale, et Donaldjohanson n\u2019est pas un \u00eatre humain, mais un ast\u00e9ro\u00efde.<\/p>\n

La rencontre a eu lieu dimanche apr\u00e8s-midi dans le Syst\u00e8me solaire, \u00e0 plus de 200\u00a0millions de kilom\u00e8tres de la Terre, dans la ceinture d\u2019ast\u00e9ro\u00efdes coinc\u00e9e entre les orbites de Mars et de\u00a0Jupiter<\/a>. La sonde est pass\u00e9e \u00e0 un peu moins de 1000\u00a0km de l\u2019ast\u00e9ro\u00efde, prenant une s\u00e9rie d\u2019images qui ont r\u00e9v\u00e9l\u00e9 son apparence \u00e9tonnante. Comme attendu il est tr\u00e8s allong\u00e9, un peu plus de 8\u00a0km de long pour 3\u00a0km de large, mais il semble surtout form\u00e9 de deux corps distincts ayant fusionn\u00e9\u2026<\/p>\n

\n Cet article est r\u00e9serv\u00e9 aux abonn\u00e9s. Il vous reste 80% \u00e0 d\u00e9couvrir.\n <\/p>\n

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