Originally posted by ThatOneFish
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It applies for clouds formation, the steam coming out the exhausts or mouths in winter, the vapor that can bee seen when you biol water (that's gaseous water coming out of the pan and turning back to water droplets as it meets the colder or less hot air above the pan) or when you open the freezer (that's moist air outside of the fridge getting colder when you open the door and it's dissolved water content turning into steam droplets).
On a second thought, forget the accurate part too. At cruise altitude the air temperature is too cold for liquid water to exist (except perhaps supercooled water which almost sure was not this).
So the white thing you see was more likely little ice crystals rather than little droplets.
The state change from gas to solid is called sublimation. So that would be a better generic label for this phenomenon.
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