Definify.com
Webster 1913 Edition
Astronomy
As-tron′o-my
,Noun.
1.
Astrology.
[Obs.]
Not from the stars do I my judgment pluck;
And yet methinks I have
And yet methinks I have
astronomy
. Shakespeare
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.
Webster 1828 Edition
Astronomy
ASTRON'OMY
,Noun.
The science which teaches the knowledge of the celestial bodies, their magnitudes, motions, distances, periods of revolution, aspects, eclipses, order, &c. This science depends on observations, made chiefly with instruments, and upon mathematical calculations.