The Collaborative International Dictionary of English v.0.48:

Selenography \Sel`e*nog"ra*phy\, n. [Gr. selh`nh the moon +
   -graphy.]
   The science that treats of the physical features of the moon;
   -- corresponding to physical geography in respect to the
   earth. "Accurate selenography, or description of the moon."
   --Sir T. Browne.
   [1913 Webster]