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Cr\u00e9dits : SpaceX<\/figcaption><\/figure>\n

Ce 8 f\u00e9vrier 2022, SpaceX a proc\u00e9d\u00e9 \u00e0 l'envoi en orbite basse de 49 satellites<\/strong>. Ils \u00e9taient cens\u00e9s venir grossir les rangs de l'armada de satellites de Starlink<\/a>, l'internet par satellites de l'entreprise am\u00e9ricain men\u00e9e par Elon Musk. Seulement, l'espace est un environnement complexe, difficile, avec de nombreux ph\u00e9nom\u00e8nes et variables \u00e0 prendre en compte.<\/p>\n

Dans un communiqu\u00e9 publi\u00e9 ce 8 f\u00e9vrier 2022, SpaceX a annonc\u00e9 avoir perdu 40 satellites sur les 49 exp\u00e9di\u00e9s<\/strong>. La faute \u00e0 un orage magn\u00e9tique, qui a d\u00e9port\u00e9 les satellites de leur trajectoire initiale. Avant toute chose, rappelons ce qu'est un orage ou une temp\u00eate magn\u00e9tique. Ce ph\u00e9nom\u00e8ne est li\u00e9 \u00e0 la variation de l'activit\u00e9 solaire<\/strong> et il peut aboutir \u00e0 des fluctuations brusques et intenses du magn\u00e9tisme terrestre.<\/p>\n

Pour faire simple, lorsque notre \u00e9toile projette une quantit\u00e9 importante de particules solaires vers la Terre<\/strong> (via ce qu'on appelle des vents solaires), la magn\u00e9tosph\u00e8re de la Plan\u00e8te bleue s'en voit perturb\u00e9e. Comme l'explique SpaceX, ces temp\u00eates “provoquent un r\u00e9chauffement de l'atmosph\u00e8re et une augmentation de la densit\u00e9 atmosph\u00e9rique \u00e0 nos basses altitudes de d\u00e9ploiement”. <\/em><\/p>\n

\"orage
Repr\u00e9sentation d'un orage magn\u00e9tique \/ Cr\u00e9dits : Wikip\u00e9dia<\/figcaption><\/figure>\n

\u00c0 lire \u00e9galement : SpaceX – une fus\u00e9e Falcon 9 va s\u2019\u00e9craser sur la Lune<\/a><\/p>\n