Cosmogony
Part of speech: noun
Definition: The study of the origin, and sometimes the development, of the universe or the solar system, in astrophysics, religion, and other fields. Any specific theory, model, myth, or other account of the origin of the universe. The creation of the universe.
Cosmology
Part of speech: noun
Definition: The study of the physical universe, its structure, dynamics, origin and evolution, and fateA metaphysical study into the origin and nature of the universeA particular view (cultural or religious) of the structure and origin of the universe
Example sentence: One of the great challenges of modern cosmology is to discover what the geometry of the universe really is.