As*tron"o*my (#), n. [OE. astronomie, F. astronomie, L. astronomia, fr. Gr. , fr. astronomer; star + to distribute, regulate. See Star, and Nomad.]
Not from the stars do I my judgment pluck;
And yet methinks I have astronomy.
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.
A treatise on, or text-book of, the science.
Physical astronomy. See under Physical.
© Webster 1913.