| 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. |
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| ▲ | hparadiz 2 hours ago | parent | next [-] | | 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. | | |
| ▲ | adrian_b an hour ago | parent [-] | | 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. | | |
| ▲ | hparadiz 41 minutes ago | parent [-] | | I imagine a foundry would use solar power and lasers to heat up the material. No atmosphere means less heat energy wasted. My thinking has been how to get enough actual build material to build something like an O'Neill cylinder. Well you'd need really thick metal plates. And then you'd want to get them into orbit without rockets. And these stations would likely be at the same orbit as Earth or nearby. Mainly because of how much sun energy you get around here. Going out to the outer solar system is a different beast all together. |
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| ▲ | sarchertech 3 hours ago | parent | prev [-] | | 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. | | |
| ▲ | runarberg 2 hours ago | parent [-] | | 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. | | |
| ▲ | shash 22 minutes ago | parent | next [-] | | The key here is “could be”. But most four (or in my case, six) year olds can’t really grasp the abstract concepts of what JWST is or the data it’s sending back. For that matter most 40 year olds can’t. A manned mission on the other hand is tangible in a way a probe isn’t. “See the big round thing in the night sky? There are four people going around it in a spacecraft”. It isn’t a _complete_ argument in favour of manned missions- that has to account for the risk of the endeavour and reward of the science potential of having people there to react in ways robots can’t. But it’s hard to pretend that the inspiration pretty much everyone feels when they see manned missions is somehow achievable purely by robotic ones. | |
| ▲ | sarchertech 2 hours ago | parent | prev [-] | | > 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. We have the capability to do that. We don’t have the will to do it, but we have the technology. We don’t even have autonomous robots that are capable of building a moon base on earth. > 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. He’s not though. People gather around as a family and watch manned space missions. It’s exciting in a way that a telescope or a probe isn’t. | | |
| ▲ | adrian_b an hour ago | parent [-] | | Indeed, in 1969, as a small child, I watched the Moon landing together with my parents, in Europe, like also the following missions, in the next years. They have certainly contributed to my formation as a future engineer. |
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