Comment by bee_rider
5 days ago
I don’t have any questions about a mission to Mars, it is a stupid and pointless trip that I don’t want to ask any questions about.
The Moon, I dunno, it’s at least in Earth’s gravity well so it isn’t like we’re going totally the wrong direction when we go there, right?
At best it could be a gas station on the trip to somewhere interesting like the Asteroid belt, though.
Whether a moon base is needed or even beneficial is a question I have not heard a convincing answer in favor. And even if moon base is indeed needed and/or beneficial to future space exploration / resource extraction why robots cannot more efficiently build (or assemble) such a moon base is another question I need an answer to.
We are sending humans to (or around) the moon now, but it may just turn out to be a wasted effort, done solely for the opulence (or more cynically bragging rights / nationalist propaganda).
> Whether a moon base is needed or even beneficial is a question I have not heard a convincing answer in favor
If we want to go to Mars, the Moon is a good place to learn. Simple things like how to do trauma medicine in low g; how to accommodate a variety of human shapes, sizes and fitness levels; how to do in situ manufacturing; all the way to more-speculative science like how to gestate a mammal. These are easier to do on the Moon than Mars. And the data are more meaningful than simulating it in LEO. If we get ISRU going, doing it on the Moon should actually be cheaper.
If we don’t want to colonize space, the Moon is mostly a vanity mission. That said, the forcing function of developing semi-closed ecologies almost certainly has sustainability side effects on the ground.
We don‘t want to colonize space. Colonizing space is science fiction, not a serious goal for humanity, and certainly not an engineering challenge. There is no reason for humans to live anywhere other then on Earth. We have more reasons to live on Antarctica or the deep ocean then on the Moon, Mars or Alpha Centauri.
What I really want is for us to send a lander and a launcher to Mars capable of returning to earth the the capsules Perseverance has been collecting. I would love for geologists on earth to examine Mars rock under a microscope. I would want them to take detailed pictures of an exoplanet using the Sun as a gravitational lens. And I would love it if they could send probes to Alpha Proxima using solar sails to get there within a couple of decades.
None of these would benefit from having a moon base. In fact this moon base seems to be diverting funds away from missions with more chance of success and more scientific value.
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I think I mostly agree with the other comment by runarberg—Earth is the place to be. But it is also worth noting that even if we do end up colonizing space, Mars is still really pointless. Mars is not significantly more habitable than orbit.
There’s some gravity: the wrong amount. In space, you can at least get 1G with centripetal force.
In orbit, you are halfway to anywhere. On Mars, you’ve gone back down the well. Make sure to bring enough gas to get out again…
Mars is just a bunch of irradiated rocks. Bring your own ecosystem, and wait a couple thousand years while it installs.
The only thing Mars has going for it is that it’s really far away, so we can still pretend to entertain sci-fi plans about colonizing it. The practical next step for space colonies would be large investments in additional space stations, a step so imminently possible that the only way to take it seriously would be to do it.
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We are nowhere near the capability to launch robots to the moon that can autonomously build or assemble a moon base for any useful definition of moon base.
> We are sending humans to (or around) the moon now, but it may just turn out to be a wasted effort, done solely for the opulence
My 4 year old is extremely excited to watch the launch tonight because it’s manned. I’d say a few billion is worth it if all it does is inspire a new generation of astronauts, engineers, and scientists.
And neither are we anywhere near the capability to lunch construction workers to the moon which can build or assemble an equivalent moon base with their human labor. So this answer does not satisfy me one bit.
> inspire a new generation of astronauts, engineers, and scientists
This is a good point. And I would like it to be true. However when you have to lie about (or exaggerate) the scientific value of the mission, that is not exactly inspiring is it. Your 4 year old could be equally inspired by the amazing photos James Webb has given us, and unlike Artemis, James Webb is providing us with unique data which is inspiring all sorts of new science.
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The moon has about the same make up as the Earth when it comes to distribution of elements in the crust. If it's anywhere near 8% like Earth then it makes sense to mine aluminum and other metals on the moon in order to build megastructures in orbit. Since the moon has no atmosphere you can accelerate things using mechanical mass drivers. Basically rail systems. At 5,300 mph you hit escape velocity and can then move payload somewhere with no rockets. It would keep us from polluting Earth too. This is the precursor to O'Neil cylinder type structures. AI robots will probably be the play but you still want a transportation system that works and frankly building a landing zone would improve overall outcomes regardless.
The rocks at the surface of the Moon are richer in metals than the crust of the Earth. They are especially richer in iron and titanium.
Without oxidizing air, it is easier to extract metals from the Moon rocks.
There is little doubt that it would be possible to build big spaceships on the Moon.
However, what is missing on the Moon is fuel. For interplanetary spacecraft, nuclear reactors would be preferable anyway, which could be assembled there from parts shipped from Earth, but for propulsion those still need a large amount of some working gas,to be heated and ejected.
It remains to be seen if there is any useful amount of water at the poles, but I doubt that there is enough for a long term exploitation.
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Mars pushes the frontier (even if no one might survive the trip due to human body deteriorating), going around the Moon is meh - we were there ~57 years ago multiple times so what's the point?
Mars isn’t a frontier, it is a wrong turn that leads to a dried out toxic well in the middle of nowhere.
We should aim for the asteroid belt. Maybe we can mine them or something. It’d be less like a frontier and more like an offshore oil platform, but still, it is at least semi-plausible.