astronomy, branch of science that studies the motions and natures of celestial bodies, such as planets, stars, and galaxies; more generally, the study of matter and energy in the universe at large.
Sections in this article:
- Development of Modern Astronomy
- Modern Techniques, Discoveries, and Theories
- Ancient Astronomy
The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2012, Columbia University Press. All rights reserved.
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