What happens if atmospheric pressure is too low on a world outside the habitable zone, even if the temperature rises above freezing?

Answer

The ice would sublimate directly into gas

If the atmosphere is too thin, the pressure may be too low for water ice to melt into liquid water even if the temperature increases slightly above freezing; instead, the ice would sublimate directly into gas.

What happens if atmospheric pressure is too low on a world outside the habitable zone, even if the temperature rises above freezing?

#Videos

Planet Earth - What Makes It Habitable? - YouTube

planetliferequirement