astrometry

noun

as·​trom·​e·​try ə-ˈsträ-mə-trē 

: a branch of astronomy that deals with measurements (as of positions and movements) of celestial bodies

astrometric

ˌa-strə-ˈme-trik 

adjective

Examples of astrometry in a Sentence

Recent Examples on the Web

Using decades of precision optical astrometry — measurements of the object's position against background stars — researchers found that gravity alone couldn't explain its irregular motion. — Samantha Mathewson, Space.com, 22 July 2026

Hyperia then automatically slews to the target and performs an operation called astrometry – measuring the precise positions of stars to double-check its accuracy. — New Atlas, 26 Jan. 2026

At the heart of Gaia’s mapmaking is a technique called astrometry, the measurement of celestial positions and motions in the plane of the sky. — Lee Billings, Scientific American, 18 June 2025

But recently, astronomers were able to combine astrometry and direct imaging together and find an exoplanet. — Jackie Appel, Popular Mechanics, 6 May 2023

Word History

Etymology

astro- + -metry

First Known Use

1811, in the meaning defined above

Rhymes for astrometry

• cytometry
• geometry
• manometry
• morphometry
• optometry
• photometry
• spectrometry
• spirometry
• thermometry
• anthropometry
• audiometry
• densitometry