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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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Was it casual? Protons and electrons are fundamental subatomic particles that determine the structure and behavior of an atom. The proton is a heavy, positively charged particle located deep inside the atom's central nucleus, and its total count defines the identity of the chemical element. In contrast, the electron is an incredibly light, negatively charged particle that rapidly orbits the nucleus in outer shells. While they have opposite charges, they have equal strength, meaning a balanced nu
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