I have found this in -
http://www.answers.com
Cosmology -
The study of the physical universe considered as a totality of phenomena in time and space.
The astrophysical study of the history, structure, and constituent dynamics of the universe.
Field of study that brings together the natural sciences, especially astronomy and physics, in an effort to understand the physical universe as a unified whole.
Cosmogony -
The astrophysical study of the origin and evolution of the universe.
Cosmogony can be distinguished from cosmology, which studies the universe at large and throughout its existence, and which technically does not inquire directly into the source of its origins. There is some ambiguity between the two terms,
still not clear to me, but just going to opt for cosmogony!!