posted on Jan, 9 2013 @ 02:24 PM
reply to post by winterkill
We'd have to develop a way of do something with the sulfur. We could break the sulfuric acid (H2SO4) into water (H2O) which is useful, and sulfur
dioxide (SO2) which is poisonous (and wants to recombine with the water). If we can break-down the SO2, that would liberate more oxygen, but all of
that sulfur laying around will make the whole planet stink like rotten eggs!
Actually, breaking-down the CO2 & SO2 would liberate too much oxygen. We'll ship some of it to Mars, along with a little over half of the
Cooling Venus is the easiest part of the process. We'll place a slowly spinning disk at the L1 Lagrange point with its axis of rotation pointing
towards the Sun (Yes, compared to re-engineering the atmosphere and creating an ecosystem, building a 10,000 mile-wide structure in space and keeping
it oriented & positioned correctly is a relatively straightforward engineering challenge. Don't do terraforming if you can't think big). This
sun-shield would let some sunlight through, and would be adjustable to calibrate the desired amount of sunlight reaching the planet (the same sort of
device could control global warming on Earth).
The shield could also solve two other problems: Venus rotates very slowly, completing a day/night cycle in ~117 days. By varying the light coming
through the shield, we can create an artificial day/night cycle of whatever duration we wish. The other thing is that, if we electrically charge the
shield, it can also deflect solar particle radiation - sort of like an ersatz-Van Allen belt (a non-light blocking charged shield would help to
The down-side is that this extra feature exacerbates problems with keeping the shield properly positioned at the L1 point. You've heard of "solar
sails". If not compensated-for somehow, solar photon pressure would push the structure away from L1, towards Venus. If charged, the solar wind and
solar particle events would add to this push.
Oh, just to correct an earlier post, Venus is closer to Earth than Mars. At closest approach, Venus is 0.2 AU from Earth, while Mars is 0.6 AU away.