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Scienceil y a 10 heures
© Hector RETAMAL / AFPPlanète bleue
Vitesse de rotation de la Terre : mais pourquoi la durée des jours (micro) rétrécit-elle cet été ?
La planète bleue a effectué sa rotation 1,33 milliseconde plus tôt que prévu. Invisibles à l’œil nu, ces infimes variations sont pourtant mesurées avec une précision vertigineuse, grâce aux horloges atomiques et aux quasars situés à des milliards d’années-lumière.
