Astronomy (&unr_;), n. [OE. astronomie, F. astronomie, L. astronomia, fr. Gr. &unr_;, fr. &unr_; astronomer; 'asthr star + &unr_; to distribute, regulate. See Star, and Nomad.] 1. Astrology. [Obs.]
[1913 Webster]

Not from the stars do I my judgment pluck;
And yet methinks I have astronomy. Shak.
[1913 Webster]

2. The science which treats of the celestial bodies, of their magnitudes, motions, distances, periods of revolution, eclipses, constitution, physical condition, and of the causes of their various phenomena.
[1913 Webster]

3. A treatise on, or text-book of, the science.
[1913 Webster]

Physical astronomy. See under Physical.
[1913 Webster]