Astronomy

lastmod 2015-06-11created 2015-06-111 edits

Astronomy is a branch of natural science that studies celestial objects such as stars, planets, comets, and galaxies, as well as phenomena originating outside Earth's atmosphere (for example, the cosmic microwave background). Its subjects of study include the origin and evolution of the universe, and the motion, physics, chemistry, meteorology, and evolution of celestial objects.

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• Wikipedia (en) Description of astronomy