Astrometry Definition

ə-strŏmĭ-trē
noun
The precise measurement of the positions and motions of celestial bodies.
American Heritage
The branch of astronomy dealing with the measurement of the positions, motions, and distances of planets, stars, etc.
Webster's New World

(astronomy) The branch of astronomy that deals with the measurement of the positions and motions of celestial bodies, particularly stars.

Wiktionary

Other Word Forms of Astrometry

Noun

Singular:
astrometry
Plural:
astrometries

Origin of Astrometry

  • astro- +‎ -metry

    From Wiktionary

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astrometry