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What Shall We Do With the Moon Once We Get There?
MarkWhittington writes "For the first time in over thirty five years, the Moon has become the next frontier. The United States has committed to returning human astronauts to the Moon by the end of the next decade. China has hinted that it intends to do this also. A variety of countries, including the United States and China, but also India, Europe, and Japan, have either sent robotic probes into lunar orbit or are on the verge of doing so." Contribute your favorite moon ideas below; I'd like to see it used as the set to film The Moon is a Harsh Mistress .
OK, if a He3 reactor comes online - fine, let's mine the moon. But we sure as hell can't live there, it has 1/6th the gravity of earth. Human beings are not adapted to 1/6G, we are adapted to 1G. If there is material on the moon worth mining, then people won't do it - machines will. We can make machines that would work in 1/6G far easier than we could adapt ourselves to live in 1/6G.
The moon is a canard. As is living on Mars.
I predict that within 500 years humanity will have spread throughout the solar system. But we won't live on a single planet or planetoid. Nor will we "teraform" any planets or moons in our solar system. We will instead *build* our habitats and live within them in orbit around various planets and moons which have materials we happen to need.
I could imagine a large rotating space station in orbit around Titan, dropping a nanotube straw to the methane atmosphere and/or oceans for energy. Or we might live in orbit around Earth, Venus, or Mercury in order to extract abundant sunlight for energy conversion.
Once we get off of Earth's gravity well, why in God's name would we build another society within another gravity well? Space is where we should live. And in space, we should build habitats suitable to our evolutionary history. And once we can do that, the notion that we waste our time looking for "habitable planets" becomes a canard. Our only interest is to look for stars and planets with enough energy to support our biological needs.
The far side of the moon could be the perfect place to build an array of radio telescopes. With the whole mass of the moon between the telescopes and the Earth, it would be well shielded from all the RF interference that our modern civilization sprays in all directions.
No, it's not good enough - because He3 fusion is LONG way off by all accounts, and you're assuming that you can't find a suitable fuel here on Earth. And it's not like He3 doesn't exist on this planet. I've got some here on my desk, for that matter - self-luminous tritium glow tubes that by my math should have decayed to about 30% He3 by now.
And IIRC, the He3 on the moon is still pretty thin on the ground. You've got to process a lot of regolith to extract it.
I'm all for going back to the moon and staying there, but He3 is not the reason. Learning to live there IS a good reason, IMHO. I'm just looking forward to the day when automated fabrication technology gets to the point where we can build maybe 80-90% of what we need in-situ without huge factories and manual labor. I'm not expecting magical nanotech assemblers any time soon, but you don't need to make EVERYTHING there. Just make the big, heavy stuff - and learn to design what you need using the materials you've got, even if it's sub-optimal.
The day when an off-world colony can produce enough wealth to pay for what it must get from Earth is the day we stop being an Earth-bound species. We'll get there by working both ends - reducing what needs to be sent up (and reducing the cost of doing so), and increasing the economic output of an off-world colony. But we need to go there first, even though it's expensive, and start learning the lessons that need to be learned.
You said we'd be building big, heavy stuff in factories on the moon. Yes, that's the right goal to aim at. But what will that "stuff" be? Not construction beams for a new lunar suburbia. They will be parts for space stations, space telescopes, spaceships, and all kinds of other stuff that we will want in orbit. Why should that stuff be made on the moon? Well, because all the raw resources are there, because automated manufacturing there should be feasible, and because it will be very easy to launch heavy things into orbit from the moon: With such low gravity and essentially no atmosphere, things can be launched with a simple railgun.
I don't think it will be so great to live on the moon, with all that nasty dust and weak gravity. I say we should cover the moon with solar panels and maybe some fission reactors, and use all that energy for smelting lunar ore, both precious and ordinary. There is no end to the usefulness of the satellites we can make from raw materials on the moon. One of those things: photovoltaic cells which we could railgun into geosynchronous Earth orbit to generate clean power for us. Another thing we need in orbit are big construction pieces from which we could build a large, rotating and mostly self-sufficient space station. That's where we should live - in orbit (maybe at a liberation point), not on the stupid moon.
Also, try to imagine assembling segments of a gigantic (as in 100+ meter) metallic mirror in lunar orbit. The resulting telescope could actually resolve exoplanets!
That's what we should be doing on the moon! Of course, before all that is possible we still need to take steps to refine our technology of automated manufacturing, and we don't need to be on the moon to do a lot of that work. But we do need to learn about the special conditions there, like issues having to do with the dust, the diversity of the geology, the feasibility of certain smelting techniques, the optimal design of nuclear powerplants for the moon, etc. (Yes, the first operations must be powered by fission, get over it. It's the fucking moon.)
So there's my answer.