The pacha (Quechua pronunciation: [pætʃæ], often translated as world) was an Incan concept for dividing the different spheres of the cosmos in Incan mythology. There were three different levels of pacha: the hana pacha, hanan pacha or hanaq pacha (Quechua, meaning "world above"), ukhu pacha ("world below"), and kay pacha ("this world").The realms are not solely spatial, but were simultaneously spatial and temporal. Although the universe was considered a unified system within Incan cosmology, the division between the worlds was part of the dualism prominent in Incan beliefs, known as Yanantin. This dualism found that everything which existed had both features of any feature (both hot and cold, positive and negative, dark and light, etc.).