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

Origin of ASTRONOMY

Middle English astronomie, from Anglo-French, from Latin astronomia, from Greek, from astr- + -nomia -nomy
First Known Use: 13th century

Other Astronomy Terms

gibbous, nadir, nebulous, penumbra, retrograde, sidereal, syzygy, wane, wax, zenith
May 23, 2015
debouch Hear it
to emerge or cause to emerge
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