Althrace
From Tardis Wiki, the free Doctor Who reference
Althrace was a solar system inhabited by a number of species. They were so advanced they had "bolted" their worlds together. Althrace was located next to a white hole, a natural force for creation. The beings from the system had gained much wisdom and knowledge thereby. They used bio-mechanical technology. Their entire system, planets and inhabitants, all had entered a symbiotic relationship, becoming a "single vast, thinking, feeling, intelligent being." (DWM: The Tides of Time)