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A comment on Planet Ceres is an 'ocean world' with sea water beneath surface, mission finds. Parent comment

Re:Planet Ceres is an 'ocean world' with sea water beneath s... by ojnabieoot on Monday August 10, 2020 @10:11PM (#24116534)
The article said it was a brine ocean, so salinity or some other solute - even at Earth gravity and air pressure, highly saline water can have a freezing point as low as -20C.
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Re:Planet Ceres is an 'ocean world' with sea water beneath s... by baggy_trough on Tuesday August 11, 2020 @03:16PM (#24124651)
The maximum surface temperature on Ceres is -118C. How would you get to -20C without geological heating?
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