It is well known that asteroids are a potential treasure trove of valuable products such as gold, nickle, iridium, and iron. Some have theorized that it may be possible to capture an asteroid and put it into orbit around our moon for easy access. How wise do you think that would be to do and, how would you overcome the challenges of attempting to dig into extremely hard substances while in extremely low gravity? For my answer: I wouldn't want to put anything in orbit around our moon. Human error will occur. The question is only, to what extent would the damage be? Such a venture would produce inordinate risk to most with all the wealth being filtered to a few. Even if everyone shared the money (which would essentially devalue the money making the venture economically useless), it's not worth the risk of a potential unforeseen chain of events disturbing our moon's orbit or, something even worse. I would choose to put asteroids in orbit around Jupiter. That system can accept far more fluctuation and, there's not a planet full of humans to be placed at risk there. Jupiter's gravity would assist in mining asteroids if we drill into the side of the asteroid facing the planet. Still, that would not be enough. We would actually need to create our own moon first. This really wouldn't be all that hard though. It's more time an resource consuming than anything. We'd start with two smaller asteroids. We'd place them in orbit around Jupiter in a perforated bag. The bag would then be filled with a foaming product able to cement the two asteroids together. The cement would need to be strong but, something we could drill into in low gravity. We'd repeat the basic joining process a few times until we had enough sets to fill the biggest bag we could ever produce. We'd fill the biggest bag with the sets and cement them all together. The perforations, having allowed cement to harden beyond the boundary of the bags, would allow for the second stage cementing to bond the sets together more securely. This would still not be enough though. From there, small asteroids could be lowered to make aggregate contact with our artificial moon's surface. They would then be covered in a perforated tarp and cemented in place. This third stage cementing is how we would get our artificial moon's mass to whatever we wanted. Throughout the entire process of construction, we would need to control the rotation and orbital behavior of our moon. Once constructed and subsequent to any settling, the artificial moon would be covered with a special ballistic treatment designed to reduce the transfer of energy in the event of any surface impact. Since much of the earlier stage cement would remain only nominally compressed, it would also assist in dissipating the energy of impacts. A track could be placed around the moon allowing us to orient the main facility so as to keep it located between our surface and Jupiter. In that way, we could make the most out of the gravity of our artificial moon and the gravity of Jupiter pulling against it as well as reduce the possibility of damage to our facility due to impact. The main facility is where we would bring other asteroids to be broken up and processed. We could always add more tracks to do work at other facilities and to bring the lowered asteroids to the main facility. With the radiation in that area being just a touch unfriendly, shielding technology would need to be advanced and adjustable. Most of all the facilities would need to be automated.