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definition of the word astronomy

by the Wiktionnary

Wikipedia has an article on:
Astronomy

Wikipedia

First coined 1570, from Latin astronomia < Ancient Greek ἀστρονομία (astronomia) < ἄστρον (astron), star) < Proto-Indo-European *h₂stḗr (star) + νόμος (nomos), arranging, regulating), related to νέμω (nemō), I deal out).

Singular
astronomy

Plural
astronomies

astronomy (plural astronomies)

  1. The study of the physical universe beyond the Earth's atmosphere, including the process of mapping locations and properties of the matter and radiation in the universe.

The study of the physical processes which control matter and energy in the universe is commonly called astrophysics. The investigation of the origin, evolution, and fate of the universe itself is called cosmology.


Definition from Wiktionary
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