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Mimas’ surprise: Tiny Moon holds Young Ocean beneath Icy Shell

Mimas' surprise: Tiny moon holds young ocean beneath icy shell
Mimas measurements and ocean models. The amplitude of libration in longitude ϕs and periapsis drift variation Δϖ for different internal structure models with an ocean. The colors represent the thickness of the ice crust hs. The gray areas correspond to the measured libration amplitude and perihelion longitude variation. The dispersion represents sensitivity to the crustal polar and equatorial flattenings (see additional tests in Methods). Credit: Nature (2024). DOI: 10.1038/s41586-023-06975-9

Hidden beneath the heavily cratered surface of Mimas, one of Saturn’s smallest moons lies a secret: a global ocean of liquid water. This astonishing discovery, led by Dr...

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