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Jan 25, 2020 at 5:15 comment added Loren Pechtel @fraxinus The low temperature liquids have substantial vapor pressures, but I'm talking about the heavy stuff.
Jan 24, 2020 at 16:40 comment added C.Champagne In fact there are several issues with your proposition: as already written a small amount of ice close enough to the sun would have sublimated quite rapidly instead of melting. Furthermore, it is very difficult to keep a round shape if the body is not massive enough. You need to reach hydrostatic equilibrium which requires a certain mass. Even Mimas hasn't reached it. It looks round but it isn't actually. see en.wikipedia.org/wiki/Hydrostatic_equilibrium#Planetary_geology
Jan 24, 2020 at 9:18 comment added fraxinus The "melting" poing needs some thinking. You cannot have liquid without pressure (read: atmosphere). At low enough pressure (space vacuum is pretty much enough) solids skip the liquid phase and sublimate.
Jan 24, 2020 at 5:37 history answered Loren Pechtel CC BY-SA 4.0