cos·mog·o·ny 
(kŏz-mŏgə-nē)
(kŏz-mŏgə-nē)n. pl. cos·mog·o·nies
1.
a. The astrophysical study of the origin and evolution of the universe.
b. A specific theory or model of the origin and evolution of the universe.
2. A philosophical, religious, or mythical explanation of the origin of the universe.
cos′mo·gonic (-mə-gŏnĭk), cos′mo·goni·cal adj.
cos′mo·goni·cal·ly adv.
cos·mogo·nist n.