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Author Topic: did all moon with ice  (Read 386 times)

felipe

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did all moon with ice
« on: September 16, 2017, 02:07:48 AM »
had a period wen there was liquid water?

because i had this idea wen i noticed all planets had a cool down period and i asked myself if all ice moons for a short period of time had liquid water and a thin atmosphere that holded the water

SyzygyΣE

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Re: did all moon with ice
« Reply #1 on: September 16, 2017, 03:38:48 AM »
An object the mass of our Moon is too small to hold onto a significant atmosphere. Even if it did have liquid water, it would just boil off because water boils in a vacuum. Generally speaking, the closer to the star, the less likely you'll find an object with a significant portion of water on it, whether solid, liquid, or gas. The stellar winds are capable of breaking apart oxygen from hydrogen in a water molecule and blasting it off into space. This is why most moons and bodies at Jupiter and beyond contain a fair amount of water since the solar wind isn't as strong at that great distance.