/sci/ - Science & Math

>>3904407

ITT: Venus Project, space edition

>>3059822
Magnetosphere is not a problem for millions of years, and we'll likely have created an artificial planetary magnetic field by 10,000AD or something.

Temperature part is plain bullshit, even today with the really thin atmosphere Mars sometimes has the equator at about 0'C. Because the Martian gravity is less, the atmosphere will be two and a half times thicker, give or take. This will be a very effective insulation keeping temperatures at Earth average. If not, a bit of an excess of CO2 that wouldn't show any noticeable effects on wildlife or humans should fix that right up.

The over-abundance of CO2 would be fixed by bioengineered algae and bacteria that would produce loads of oxygen at the same time while the air pressure is gradually going up. And I'm sure if this isn't enough we can whip up some easily-replicable-from environment 'bots that can chew CO2 and pump out loads of O2.

>residual radiation could make the planet very dangerous for life for a couple decades of terraforming.

...So you're suggesting that the first twenty years of terraforming should mean we take space-like radiation precautions and suits?
Thank you, Captain Obvious.

>>3059829
Mars would be an airless crust of a planet with almost exactly the same gravity and appearance to Mercury. Venus would likely be a waterworld with primitive lifeforms had it been 230 million kilometers out.

>>2923810
Two ways.
First, after most of the atmosphere has been frozen out and jettizoned, we let some light in through the parasol to raise the temperature a tiny bit above the freezing temperature of CO2. Then we begin directing Kupier belt comets in toward Venus. To stop them losing their water an extremely thin reflective shroud could surround the comet while it is accelerated in toward the inner solar system. When these comets impact, they should all impact on the 'left' side as Venus rotates counter to every other important celestial body in our solar system. This, while it won't increase the rotational speed by much will be a start.

After the dumping of water is complete, I guess you could put rings of some non-corroding electromagnets around the latitudes of Venus. Orbiting overhead would be solar powered satellites that slowly push Venus to rotate more and more. I'm probably not explaining this all that well, but as long as a constant amount of power is being generated, Venus could have a 24 hour day within a few centuries. I got this idea from the book Blue Mars. I think.

How would one calculate the energy required to speed up a planets rotation (Venus) to 24 hours?