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Water in the solar system - was Re: halite in Monahans
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- Subject: Water in the solar system - was Re: halite in Monahans
- From: Jim Hurley <email@example.com>
- Date: Wed, 22 Jul 1998 09:26:36 -0700
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It is thought that in the presolar nebula, at about 5 AU, there would be
a slush zone, where temperatures would be cool enough for water-ice to form.
This could be a reason why Jupiter formed there.
The asteroids in the far region of the belt are assumed to have once
contained quite a lot of water and from these we get the CI-type meteorites.
There are some samples of asteroids out there that appear reddish or orange
and we have no known samples of that type of rock - expected to have lots of
Farther out in the solar system, water mixed with a little ammonia forms
a melt at quite low temperatures and a little pressure. This can cause
the water-based differentiation of the moons of Jupiter and Saturn.
The process is interesting, at a pressure of 2-kbar water mixed with ammonia
can melt in a satellite composed of mixed water-ice and rock. A thin zone forms
underground where the water becomes liquid and the rock and mud settle downward.
The region starts to grow and widen. Eventually the surface ruptures - from a
collision event or whatever, and all the water gushed out in a geyser. The surface
sinks and mixes with the unmelted core. Then the process begins anew. Eventually
all the rock settles to the core and the water-ice ammonia solution is at the
> As I am just a layman, I wouldnt think to question that, except I've herd
> somewhere that water in liquid form has only been found on the Earth, Mars
> (in prehistoric times) ans possibly Europa.
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