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Notez bien la date du 15 novembre 2026. Ce jour-là, nous vivrons un moment historique : la sonde Voyager 1 sera à un jour-lumière de la Terre, soit près de 26 milliards de kilomètres ! Concrètement, cela signifie qu’un signal radio envoyé depuis la Terre mettra environ 24 heures à lui parvenir, et qu’il faudra encore 24 heures pour recevoir sa réponse. Autrement dit, chaque échange avec la sonde nécessitera près de deux jours. Lancée en 1977 par la NASA, Voyager 1 est l’objet fabriqué par l’être
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