Dictionary

astronomy

noun as·tron·o·my \ə-ˈsträ-nə-mē\

: the scientific study of stars, planets, and other objects in outer space

plural as·tron·o·mies

Full Definition of ASTRONOMY

: the study of objects and matter outside the earth's atmosphere and of their physical and chemical properties

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Middle English astronomie, from Anglo-French, from Latin astronomia, from Greek, from astr- + -nomia -nomy

First Known Use: 13th century

ASTRONOMY Defined for Kids

noun as·tron·o·my \ə-ˈsträ-nə-mē\

: a science concerned with objects and matter outside the earth's atmosphere and of their motions and makeup

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