Water on Venus.

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Strange Creature - 29 Jul 2006 01:11 GMT

So the sun was not as hot several billion
years ago in comparison with now.
If Venus had water it could lock much
of its carbon dioxide in its modern
atmosphere in carbonate rocks.

Does anyone have any links or
any references to the theoretical
feasibility or unfeasibility concerning
water on Venus many billions of
years ago?

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CeeBee - 29 Jul 2006 02:20 GMT

"Strange Creature" <strangecreature7@yahoo.com> wrote in sci.astro:

> Does anyone have any links or
> any references to the theoretical
> feasibility or unfeasibility concerning
> water on Venus many billions of
> years ago?

Ever considered googling "water on venus"? It only gave me 12,400,000 hits.

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ianparker2@gmail.com - 29 Jul 2006 14:06 GMT

> So the sun was not as hot several billion
> years ago in comparison with now.
[quoted text clipped - 7 lines]
> water on Venus many billions of
> years ago?

Abstract online via the following DOI link:
http://dx.doi.org/10.1016/j.actaastro.2006.04.011

(This had earlier been presented at the International Astronautical
Federation Congress in 2004, the paper can be found at
http://mit.edu/aeroastro/www/people/landis/Venus_IAF04.pdf )

Key fact Isotope separation. Venus in the past had a similar amount of
water to Earth. The amount of Deuterium is proportional to loss. The
water there is on Venus is distictly "heavier" than on Earth.

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John Curtis - 30 Jul 2006 19:01 GMT

> So the sun was not as hot several billion
> years ago in comparison with now.
> If Venus had water it could lock much
> of its carbon dioxide in its modern
> atmosphere in carbonate rocks.

Carbon dioxide is not an inherited component of the solar system;
there is none on Jupiter, Moon, only a trace on Pluto or Titan.
CO2 is formed by the action of oxygen on methane (CH4).
Since there is no free interstellar oxygen, all oxygen on Venus
was derived from UV splitting of water.
http://aramis.obspm.fr/mol/list-mol.html
Two molecules of H2O were destroyed for the creation of
each molecule of CO2, which means that Venus had
at least twice as much water as current CO2. John Curtis

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Space Forum / Astronomy / July 2006

Water on Venus.