Source : Webster's Revised Unabridged Dictionary (1913)

Cosmogony \Cos*mog"o*ny\ (-n?), n.; pl. {Cosmogonies} (-n?z).
   [Gr. kosmogoni`a; ko`smos the world + root of gi`gnesthai to
   be born: cf. F. cosmogonie.]
   The creation of the world or universe; a theory or account of
   such creation; as, the poetical cosmogony of Hesoid; the
   cosmogonies of Thales, Anaxagoras, and Plato.

Source : WordNet®

cosmogony
     n : the branch of astrophysics that studies the origin and
         evolution and structure of the universe [syn: {cosmology},
          {cosmogeny}]