u·ra·nog·ra·phy 
(yr′ə-nŏgrə-fē)
(yr′ə-nŏgrə-fē)n.
The branch of astronomy concerned with mapping the positions of stars, galaxies, and other celestial bodies on the celestial sphere and with studying historical celestial maps. Also called celestial cartography.
[Greek ouranos, sky + -GRAPHY.]
u′ra·no·graphic (-nə-grăfĭk) adj.