astronomy

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:

• Introduction
• Ancient Astronomy
• Development of Modern Astronomy
• Modern Techniques, Discoveries, and Theories
• Bibliography

The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2012, Columbia University Press. All rights reserved.

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