What Heats the Bottom of the Enceladus Moon’s Ocean to 194 Degrees Fahrenheit?

— “We think that the temperature at least in some part of the ocean
must be higher than 190 degrees Fahrenheit. If you could swim a little bit
further from the really hot part, then it could be comfy.”

- Sean Hsu, Ph.D., Laboratory for Atmospheric and Space Physics, Univ. of Colorado