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Posted by Jacob Krolo on May 20, 2008, 8:25 am
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> In such an instance as the Pegasi gas giant, it may be safe to claim
> that its current mass should now be considerably less than it had been
> when this system was in its infancy.
>
>
>
>
> David Williams wrote:
> > -> Shouldn't a certain amount of any planet's volatile gasses be
stripped
> > -> away in a solar system, regardless of proximity, star age or type?
> >
> > Yes. If a significant fraction of the molecules of any gas in the
> > atmosphere are moving with speeds approaching the gravitational escape
> > velocity of the planet, then some of them will escape into space, and
> > that gas will be lost from the atmosphere. So the higher the
> > temperature, the lighter the molecules, and the weaker the planet's
> > gravity, the faster the gas will escape.
> >
> > dow
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Yes, some of the gas will escape into space, but obviously there is
another aspect which should be considered!
Not only the planet's gravity, but in addition a gravitational forces
of the
gas, preventing atmosphere not to be significantly depleted during the
time.
Jacob
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