Klach D'Kel Bracht was a nebula created by supernovae remmants and a hazardous area within the territory of the Alliance in the mirror universe. Memory Omega maintained a base on the planet in the Klach D'Kel Bracht and were able to keep the location hidden from the Alliance. In 2377, Jean-Luc Picard and Deanna Troi met Reginald Barclay and K'Ehleyr on the planet in Klach D'Kel Bracht. (ST - Mirror Universe novel: Rise Like Lions)