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Definition of "astrometry" [as•trom•e•try]

  • The scientific measurement of the positions and motions of celestial bodies. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Use "astrometry" in a sentence
  • "That research team used a different analysis method known as astrometry."
  • "The researchers found the planet using a method called astrometry, which precisely tracks the position of stars over time."
  • "The National Aeronautics and Space Administration said the technique, called astrometry, involves measuring the motions of a star as an unseen planet tugs the star back and forth."