OpenSimWorld is the directory of 3D Virtual Worlds based on OpenSimulator and connected through the HyperGrid. Learn More

The City and the Stars is a science fiction novel by British writer Arthur C. Clarke, published in 1956... The Mad Mind had devastated the galaxy and its civilizations before being imprisoned in a "strange artificial star" called the Black Sun.....

https://en.wikipedia.org/wiki/The_City_and_the_Stars