Terraforming Venus

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Skipjack
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Terraforming Venus

Postby Skipjack » Sat Dec 24, 2011 10:03 am


rjaypeters
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Re: Terraforming Venus

Postby rjaypeters » Sat Dec 24, 2011 12:05 pm

"Aqaba! By Land!" T. E. Lawrence

R. Peters

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Re: Terraforming Venus

Postby Diogenes » Sat Dec 24, 2011 4:04 pm

‘What all the wise men promised has not happened, and what all the damned fools said would happen has come to pass.’
— Lord Melbourne —

Skipjack
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Postby Skipjack » Sat Dec 24, 2011 4:08 pm


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Postby choff » Sat Dec 24, 2011 10:00 pm

Well, if we ever get lucky enough to have fusion powered engines, we can play cosmic billiards with the Oorth cloud to dump water on the Venetian surface, and maybe bind up the CO2 and impart spin.

Ceres and Vesta might have something to offer in a home away from home, if we can tunnel inside them a little.
CHoff

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Postby Betruger » Sat Dec 24, 2011 10:14 pm

Yes, results from the Ceres probe ought to be interesting. Was anyone following Cassini's initial Iapetus rendez vous? What it found was totally unexpected.

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Postby Aero » Sun Dec 25, 2011 5:50 pm

Aero

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Postby hanelyp » Mon Dec 26, 2011 1:58 am

Zeppelin cities of Venus... I can see come potential there.

A quick google search found

Reading the graphs, you'd want your Zeppelin city flying above 53 km for a comfortable temperature. Probably easier to keep the habitat warmer than ambient. Pressure at those altitudes would allow comfortable breathing with a high O2 content atmosphere. The one big problem I see is the sulfuric acid clouds extending well above and below this zone of favorable temperature and pressure.

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Postby Skipjack » Mon Dec 26, 2011 10:43 am


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Postby Helius » Mon Dec 26, 2011 10:09 pm


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Postby palladin9479 » Tue Dec 27, 2011 3:09 am


choff
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Postby choff » Wed Dec 28, 2011 1:24 am

CHoff

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Postby williatw » Sat Dec 31, 2011 9:03 am

Also from Wikipedia: http://en.wikipedia.org/wiki/Terraformi ... uestration

Introduction of hydrogen

Bombarding Venus with hydrogen and reacting it with carbon dioxide, could produce elemental carbon (graphite) and water by the Bosch reaction. It would take about 4×10 kg of hydrogen to convert the whole Venerian atmosphere. (Loss of hydrogen due to the solar wind is unlikely to be significant on the timescale of terraforming.) Due to the relatively flat surface, this water would cover about 80% of the surface compared to 70% for Earth, even though it would amount to only roughly 10% of the water found on Earth.[4]

The remaining atmosphere, at around 3 bars (about three times that of Earth), will mainly be composed of nitrogen, some of which will dissolve into the new oceans of water, reducing atmospheric pressure further, in accordance with Henry's law.
Capture in carbonates
Bombardment of Venus with refined magnesium and calcium metal could sequester carbon dioxide in the form of calcium and magnesium carbonates. About 8×1020 kg of calcium or 5×10 kg of magnesium would be required, which would entail a great deal of mining and mineral refining.[8] 8×1020 kg is a few times the mass of the asteroid 4 Vesta (more than 300 miles in diameter).
Modelling by Mark Bullock[9] of Venus' atmospheric evolution suggests that existing surface minerals, particularly calcium and magnesium oxides, could serve as a sink of carbon dioxide and sulphur dioxide. If these could be exposed to the atmosphere then the planet would cool and its atmospheric pressure decline somewhat. One of the possible end states modelled by Bullock was a 43 bar atmosphere and 400 K surface temperature.


Especially like the idea of introducing hydrogen to make Venus have all that water, reminds me of Ray Bradbury's raining Venus. Sure you could find that much hydrogen already frozen in the Oort cloud somewhere. Decent nuclear pulse rockets could move it to...we would get to bomb Venus with "hydrogen bombs"!

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Postby Scupperer » Sat Dec 31, 2011 2:28 pm

Perrin Ehlinger

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Postby KitemanSA » Sat Dec 31, 2011 7:46 pm



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