Les dernières orbites de la sonde Cassini autour de Saturne fin août-début septembre 2017 ont fourni une occasion unique de sonder la région située entre la haute atmosphère de Saturne et l'anneau D, l'anneau le plus interne. Une étude détaille aujourd’hui les résultats des cinq dernières orbites qui ont échantillonné directement la thermosphère de Saturne et ont permis une analyse in situ approfondie de la composition de cette région. La complexité inattendue des données enregistrées par le spectromètre de masse INMS met en lumière le couplage qui existe entre l'atmosphère et les anneaux de Saturne et confirme une très forte érosion des anneaux, qui tombent sur la géante à grande vitesse. L’étude est publiée dans Journal of Geophysical Research : Planets.
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- #1342 : Saturne : très forte érosion des anneaux confirmée
Publié le par eric simon
Eric Simon
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