The Celestials were a powerful species active in the Star Wars Universe 100,000 years before the Battle of Yavin. With the help of the Kiliks they built Centerpoint station and using that they created Kessel, the Maw, the Corellian system, the Unknown Regions, the Lothal, Ilum and Jedi temples. They were massively powerful in the Force giving it to species who would become prosperous in their future, but in time they all fell.
The celestials would eventually be killed off by the Rakatan civilization 30,000 years before the Battle of Yavin.