Uuz
From superman.nu: Supermanica
An intensely cold, "undiscovered world far beyond Pluto's distant orbit," where gravity is "far weaker than that of Earth" and where the buildings and automobiles are made out of glass. It is the home of the super-hero Regor and the villain Bantor. (S No. 58, May/Jun 1949: "The Case of the Second Superman!")