According to the large body of films and other fiction that belong to the "Star Wars" franchise, the Republic is formed 25,000 years before the events of "Star Wars" when the first "Galactic Constitution" is signed on Coruscant, after the Corellian Hyperdrive connects many worlds in the Core. The Republic is made up of several hundred thousands of worlds, and each planet or system has representation in the Republic Senate, which comprises most of the Republic Legislative Branch and the government itself. It starts off merely as an economic and protective alliance, mainly among the Core worlds. It eventually expands to the Colonies and other outlying worlds and regions, becoming a superpower rather than an alliance, and it becomes the central government for the galaxy.