#1633 : Anneaux de Saturne : de la glace d'eau pure et cristalline

Ça Se Passe Là-Haut

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3M ago 10:23

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Des planétologues ont utilisé le télescope Webb pour analyser la composition des anneaux de Saturne, ainsi que quatre de ses petites lunes (Épiméthée, Pandora, Télesto et Pallène). Les spectres dans le proche infra-rouge obtenus avec NIRSpec et MIRI révèlent une composition quasi pure en glace d'eau cristalline. Ils publient leur étude dans Journal of Geophysical Research:Planets.

https://www.ca-se-passe-la-haut.fr/2024/03/anneaux-de-saturne-de-la-glace-deau.html

Source

Water-Ice Dominated Spectra of Saturn's Rings and Small Moons From JWST
M. M. Hedman et al.
Journal of Geophysical Research: Planets (09 March 2024)
https://doi.org/10.1029/2023JE008236

Illustrations

Saturne et ses anneaux imagés par le télescope Hubble (NASA, ESA and E. Karkoschka (University of Arizona))
Images spectrales des anneaux par Webb (Matthew Hedman et al.)
Images spectrales de Pandora et Epiméthée (Matthew Hedman et al.)
Matthew Hedman

1700 episoade

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