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Physics, 04.06.2020 16:57 livy151515

L'étoile Sirius est l'étoile la plus brillante lorsqu'on observe le ciel. Elle est située à environ 86 000 000 000 000 km de la Terre. 1) À combien d'années-lumière Sirius est-elle située de la Terre ? 2) Quelle durée la lumière de Sirius met-elle pour nous parvenir ?

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