I'm starting this thread hoping to get some thoughts on the idea of terraforming various spots in the solar system. Everything from technical questions to ethical considerations.
If some of the people in this group are going to become immortal, or at least radically extended in lifespan, we're going to have to consider that not only is this plante groaning under the weight of the extant population but almost certainly there will be a cultural backlash with violent overtones. That means immortals are going to need somewhere to go.
Everyone wants to talk about terraforming Mars, but I'm opposed to it for now. There is simply too much to learn up there to start pumping a bunch of corrosive O2 into the atmosphere. There's also the peroxide problem, that I have yet to hear any of the Green Mars factions address. Further, I'll bet $20 that there's already a complex ecosystem on Mars, and if that proves to be true, then you've got a better chance of building condos in Yellowstone than Terraforming Mars.
The logical place to start is the Moon. In 1969 we got there in 3 days. The farside of Luna, for reasons that are not understood, is much more hilly and wrinkled than the earthside. I think that it's likely that there is a significant reserve of volatiles frozen in shaded canyon. We also know that there are moonquakes. Since plate tectonics can not account for this, a possible explanation is that Luna's interior has large voids filled with ice, gas or liquids, and that every once in awhile the chunks of rock shift a bit over these voids. Luna is also not as dense as it should be, which has all kinds of conspiracy theorists saying it's hollow and full of aliens. I think water is more likely. If we were able to release these gases to a survivable pressure, the atmosphere would take several thousand years before it escaped the gravity well, really enough time to solve that particular problem. There's the small matter of solar radiation (not that small actually) but given enough power from nuclear reactors or solar panels, I think a sufficient electromagnetic feild could be generated to take care of a goodly portion of that. Hopefully the atmosphere I propose would burn up much of the micrometeorite bombardment, but Lunar fashions will probably include a helmet. A green Moon would also have a huge cultural effect on the entire Earth, and stand as a constant reminder to everyone on Earth of the power of human ingenuity, and serve as a social pressure to increase scientific advancement. Brain products will probably be the basis of a Lunar economy, and Earth will likely suffer a significant brain drain as a result. The best talent will want to live and work on Luna.
Given the success of The Mars Society(at least in terms of gaining membership), and that civilians have now started to outdo NASA with the awarding of the X-prize, a project to terraform Luna could gain a powerful momentum. There's already this wackjob selling real estate certificates for Lunar property (and he will try to sue us, he's nuts). As far as I know there are no legal hurdles to designing a remote mission, or a manned mission, to go look for water and volatiles. If we could cheaply send a host of robots with a simple mission: find ice and evaporate it, report back, this project could easily be underway in a decade. Send up another to plant some kind of alpine moss or lichen, and the first spots of green could be visible through a telescope in 20 years.
Who wants a cabin on Lake Armstrong? I do.