The discussion revolves around the concept of water being 'discovered' on other planets and moons, particularly focusing on the implications of such findings in the context of their physical states (solid, liquid, vapor) and the conditions that allow for their existence. Participants explore theoretical and practical aspects of water in extraterrestrial environments, including sublimation, atmospheric pressure, and escape velocity.
Participants express a mix of agreement and disagreement regarding the conditions under which water can exist on other celestial bodies. While some points are clarified, the discussion remains unresolved on several theoretical aspects, particularly concerning the behavior of water in various states and the implications of sublimation and escape velocity.
Limitations include assumptions about atmospheric conditions, the definitions of escape velocity, and the specific energy requirements for water molecules to remain bound to a planet. The discussion does not resolve these complexities.
Is water 'discovered' on another planet hogwash?
LOLOLOLOL!Originally posted by Njorl
you could rasp the filth off a hog with it, like you can do with pumice.
Originally posted by Njorl
Since most of the water on other bodies in our solar system is in solid form, it would be very difficult to wash hogs with it. I suppose, if it were crushed into granules, you could rasp the filth off a hog with it, like you can do with pumice.
Njorl
Very carefully.Originally posted by S = k log w
How do Brass Hogs mate?
Originally posted by chroot
LOLOLOLOL!
Don't forget that ice sublimates, guys... you'll get an atmospheric vapor pressure just like you would with liquid water.
- Warren
Yup. Some of the molecules with enough energy will escape the planet's surface, cooling the planet. Those with too little energy will remain gravitationally bound, just like the oxygen molecules you're breathing right now.Originally posted by S = k log w
Serously, now. It is indeed true that ice sublimates. What will prevent the gaseous form of water from filling the vacuum of space?
If you were to put an ice cube in space, wouldn't it (violently) boil off into space? If you were to create an atmospheric pressure of water vapor, wouldn't it (the water vapor) 'gas off' in the vacuum unless it had achieved a large mass? Would the water be depleted in the process?
Originally posted by chroot
Yup. Some of the molecules with enough energy will escape the planet's surface, cooling the planet. Those with too little energy will remain gravitationally bound, just like the oxygen molecules you're breathing right now.
- Warren
Just use statistical mechanics to solve for the temperature when nearly all (99.9%?) of gas particles have velocities less than the planet's escape velocity (which depends upon its mass and radius).Originally posted by S = k log w
What is the ratio between planet/body, the mass of water, and the energy on the/at the planet for there to be water in any aggregate mass on/near/in the planet?
Originally posted by chroot
Just use statistical mechanics to solve for the temperature when nearly all (99.9%?) of gas particles have velocities less than the planet's escape velocity (which depends upon its mass and radius).
- Warren