How to Use astrometry in a Sentence

astrometry

noun

• With astrometry, instead of measuring the radial motion of a star, astronomers measure its tangential motion on the sky as it is pulled in different directions by orbiting planets.
  — Keith Cooper, Space.com, 8 Oct. 2025
• Hipparcos was the first space mission devoted to precision astrometry, the accurate measurement of celestial positions and distances.
  — Joe Rao, Space.com, 3 July 2026
• 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
• Gaia, however, is the most sensitive astrometric survey ever performed and will dramatically increase the number of exoplanets found through astrometry.
  — Keith Cooper, Space.com, 8 Oct. 2025
• 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