Universe Sandbox
General Category => Astronomy & Science => Topic started by: felipe on September 16, 2017, 02:07:48 AM
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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
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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.