- Joined
- Aug 12, 2022
As has been stated, water's needed for whatever humans up there to survive and for lubricant. Also coolant. But,I agree that it's retarded thinking we'll send people into space to mine fucking water of all things, and in general Earth has massive amounts of resources that are more than sufficient.
This has been done. Electrolysis of water breaks the molecule in two, into hydrogen and oxygen, both used as rocket propellants. NASA did a demo of a cubesat propelling itself this way. Most of the challenge is producing enough electricity to actually do it, as there's not many methods you can use at a large scale which would result in net energy positive reactions. You also have to have a sealed reaction chamber where the gases produced can be separated. You need less energy to produce the necessary thrust in space, since there's no friction or gravity to contend with, but moving cubic kilometers of ore around in a timely manner is still going to take a fuckload.Supposedly the chemical and industrial processes it would take to manufacture in space has already existed for a long time, so as long as you can make rocket fuel from water (which as I understand has still not been done, but is theoretically sound)
Space resources are still largely useless to us down here. The most desirable materials up there to us right now would be rare earths and helium. Sweden just unearthed a massive rare earth metals deposit that will end Chinese dominance, but it'll take a decade or more to get to production. Helium-3 is present on the surface of the moon, but in low quantities with mining it being sci-fi for now. Next closest source is Jupiter, where it's unknown how much there is, but where mining it is also sci-fi.
No matter how you look at it, space exploration and resource gathering are currently a white elephant that won't do much of anything to improve lives for people down here. They will have value in the future, and they always have value to experiment and learn in, but nothing up there can be brought back here in an economically viable manner yet, and we'll likely have functional fusion power by then.