Source : Webster's Revised Unabridged Dictionary (1913)

Uranology \U`ra*nol"o*gy\, n. [Gr. ? heaven + -logy.]
   A discourse or treatise on the heavens and the heavenly
   bodies; the study of the heavens; uranography.

Source : WordNet®

uranology
     n : the branch of physics that studies celestial bodies and the
         universe as a whole [syn: {astronomy}]