> I liked that Ringworld addresses this Just FYI, but the Ringworld as Larry Niven envisioned it simply doesn't work because no known or theorized material is

> I liked that Ringworld addresses this Just FYI, but the Ringworld as Larry Niven envisioned it simply doesn't work because no known or theorized material is remotely strong enough. To produce gravity a Ringworld needs to orbit the star. This produces centrifugal force that is tearing the ring apart. I believe around our Sun it would need to spin at about 1.2M mph [1]. [1]: https://www.bbc.com/future/article/20150609-will-we-ever-build-ringworlds#:~:text=Assuming%20that%20the%20ringworld%20shares,rotate%20at%20approximately%201%2C200%2C000mph https://www.bbc.com/future/article/20150609-will-we-ever-bui....