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A recently formed ocean inside Saturn's moon Mimas

Moons potentially harbouring a global ocean are tending to become relatively common objects in the Solar System1. The presence of these long-lived global oceans is generally betrayed by surface modification owing to internal dynamics2. Hence, Mimas would be the most unlikely place to look for the presence of a global ocean3. Here, from detailed analysis of Mimas’s orbital motion based on Cassini data, with a particular focus on Mimas’s periapsis drift, we show that its heavily cratered icy shell hides a global ocean, at a depth of 20–30 kilometres. Eccentricity damping implies that the ocean is likely to be less than 25 million years old and still evolving. Our simulations show that the ocean–ice interface reached a depth of less than 30 kilometres only recently (less than 2–3 million years ago), a time span too short for signs of activity at Mimas’s surface to have appeared. An analysis of the orbital motion of Saturn’s moon Mimas shows that a recently formed global subsurface ocean lies beneath its cratered icy shell and that this ocean is probably still evolving.

Grasset , Auvergne , France , Noyelles , Picardie , Charnoz , Rhôalpes , Charnay , Franche-comtér , French , Van-hoolst , M-el-moutamid

Scientists Detect 6000-Mile-Long Plume of Water Escaping From Saturn's Moon

SwRI scientist awarded JWST Cycle 2 observations of Enceladus A pair of scientists from the Southwest Research Institute (SwRI) were members of a James Webb Space Telescope (JWST) team that observed a towering plume of water vapor stretching over 6,000 miles — a distance comparable to that between

Japan , Silvia-protopapa , M-el-moutamid , Christopher-glein , Geronimo-villanueva , Research-institute-sw , Goddard-space-flight-center , Alyssa-pagan , Southwest-research-institute , James-webb-space-telescope , Near-infrared-spectrograph , Space-flight-center

Webb Space Telescope Detects 6000-Mile Water Plume Jetting From Saturn's Moon Enceladus

Interaction between moon’s plumes and Saturn’s ring system explored with Webb Enceladus—a tiny, icy moon of Saturn—is one of the most intriguing objects in the search for signs of life beyond our own planet. Under a crust of ice lies a global ocean of salty water. Jets, supplied by that ocean, g

Maryland , United-states , Argentina , Buenos-aires , Distrito-federal , Canada , Goddard-space-flight-center , Canadian , Leah-hustak-stsc , M-el-moutamid , Heidi-hammel , L-hustak-stsc