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The Collaborative International Dictionary
Astrometry

Astrometry \As*trom"e*try\, n. [Astro- + metry.] The art of making measurements among the stars, or of determining their relative magnitudes.

Wiktionary
astrometry

n. (context astronomy English) the branch of astronomy that deals with the measurement of the position and motion of celestial bodies, particularly star.

WordNet
astrometry

n. the branch of astronomy that deals with the measurement of the position and motion of celestial bodies

Wikipedia
Astrometry

Astrometry is the branch of astronomy that involves precise measurements of the positions and movements of stars and other celestial bodies. The information obtained by astrometric measurements provides information on the kinematics and physical origin of the Solar System and our galaxy, the Milky Way.

Usage examples of "astrometry".

With these numbers in hand, I tapped into the astrometry computer over at the National Science Center.