Relativistic Ringworlds

No matter how many times he considered it, Jophiel shivered with awe. It was obviously an artefact, a made thing two light years in diameter. A ring around a supermassive black hole. Stephen Baxter, Xeelee: Redemption (2018)   I’ve written about rotating space habitats in the past, and I’ve written about relativistic starships, so I … Continue reading Relativistic Ringworlds →