Re: [TML] Where the UPP fails me... shadow@xxxxxx 01 May 2020 01:06 UTC
Ringworlds require unreasonably strong materials. Dyson spheres are worse. But Alderson discs take the prize. they need some sort of reinforcing to prevent them collapsing radially into a sphere. Worse, the amount of material required would use up all the matter in quite a few solar systems. Like hundreds or thousands. Probably more than that (I don't feel like doing the math right now). -- Leonard Erickson (aka shadow) shadow at shadowgard dot com