Weber's World is an artificial planet-sized satellite which exits in the 30th and 31st century of Earths history. The planet was built to help administer the United Planets Federation governmental operations. The planet first made its debut in Superboy and the Legion of Super-Heroes #241 in July, 1978.
Webers World has been attacked several times during its active history. Once by the Khund during the Earthwar, later by legions of Daxamite during the Great Darkness Saga; and it was even briefly taken over by the former Fatal Five villain known as the Emerald Empress.
Also in the Zero Hour timeline the Daxamite hero Laurel Gand, dies on Webers World. Surgeons were unable to save her life from injuries sustained in a bomb blast on Webers World.