How much quicklime would it take to terraform Venus?

[ravens_cry]

There's plenty of hydrogen on Venus, just look at all the sulphuric acid.
How much heat would a heavy oxygen atmosphere retain compared to a heavy carbon dioxide atmosphere?
Would the high heat and pressure mean the surface rocks would oxidise? That would remove at least some if so.
Also, now if you want to import something with solid oxides as dust. Say iron, or some other substance, launched by rail gun from Mercury.

[cjameshuff]

Hmmm, sounds like we need to bleed off some excess atmosphere anyway, so why not put a tap on the magnetotail, or better, a double tap: one big filament to Mars with stuff we'll eventually need there, and another smaller filament that interacts with the Venetian ionosphere to recycle water vapor.

Removing atmosphere likely won't improve things on Venus. A deeper, denser atmosphere will reduce the day/night extremes and might better support high altitude cloud layers that more effectively reflect excess sunlight. Venus just isn't a good terraforming target.

There's plenty of hydrogen on Venus, just look at all the sulphuric acid.
How much heat would a heavy oxygen atmosphere retain compared to a heavy carbon dioxide atmosphere?
Would the high heat and pressure mean the surface rocks would oxidise? That would remove at least some if so.
Also, now if you want to import something with solid oxides as dust. Say iron, or some other substance, launched by rail gun from Mercury.

There's plenty hydrogen for industrial uses, but nowhere near enough for terraforming, and it's not available for reaction with the CO2.

And importing oxides is a terrible approach. Transporting 4 amu of hydrogen consumes one molecule of CO2 and produces 2 molecules of badly-needed water. The lightest oxide, lithium oxide, Li2O, masses 30 amu and sequesters one molecule of CO2 as lithium carbonate, which will have to be stockpiled somewhere to keep it from dissolving in the water that you import later. FeO would be about twice as bad, the other oxides of iron even worse. The problem is that Venus has too much oxygen, and you're talking about importing an equivalent to half of what the atmosphere already has between planets while bound in solid form to even heavier elements.

A somewhat better approach would be to bombard Venus with elemental aluminum and silicon. These materials are easily obtainable from orbital sources and could be formed into projectiles that burn on entry with the CO2, producing oxides and carbon. This still leaves you with the need to import nearly 10 times the mass as you'd need of hydrogen, and leaves you needing to import water...or hydrogen to make it with all the oxides you have around.

[ravens_cry]

Not oxides, something that *becomes* oxides, like, yes aluminium and silicon.

[cjameshuff]

Not oxides, something that *becomes* oxides, like, yes aluminium and silicon.

Or hydrogen.

[ravens_cry]

Or hydrogen.

Yeah, that work work even in the oxygen heavy atmosphere after. It would take a while to condense out into oceans as water vapour is even more of a greenhouse gas than carbon dioxide.

[Githyanki]

Didn't the Star Trek Movies have a laser-beam that could terraform worlds into lush tropical forests?

Also, I think, IMHO, that in the end, Venus will look exactly like Earth with a 24-hour rotation. This will be due to men/apes/dolphins/etc. that have more intellect and scientific-understanding than us, with our primitive 21st-century ignorance.