astronomy

astronomy is a   Noun

Definition:

[1] Astrology. [Obs.] Not from the stars do I my judgment pluck; And yet methinks I have astronomy. Shak.

[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.

[3] A treatise on, or text-book of, the science. Physical astronomy. See under Physical.

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