from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. The scientific measurement of the positions and motions of celestial bodies.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. the branch of astronomy that deals with the measurement of the positions and motions of celestial bodies, particularly stars.

from the GNU version of the Collaborative International Dictionary of English

  • n. The art of making measurements among the stars, or of determining their relative magnitudes.

from The Century Dictionary and Cyclopedia

  • n. The art of determining by measurement the apparent relative magnitude of the stars.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

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


from Wiktionary, Creative Commons Attribution/Share-Alike License

astro- + -metry


  • That research team used a different analysis method known as astrometry. Top headlines

  • The researchers found the planet using a method called astrometry, which precisely tracks the position of stars over time.

    Yahoo! News: Business - Opinion

  • 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.

    Latest News -

  • One of the biggest requirements arguments was over an exact and usually uninteresting subfield of astronomy called astrometry, the study of how to measure precisely a star’s position in the sky.

    A Grand and Bold Thing

  • The first player organizes his hand by type, for example he may have 3 "astrometry" cards, 2 "pulsar timing" cards, and 2 "direct imaging" cards.

    thing-a-day 2010

  • The player above is able to use two of his "astrometry" detection cards on that star.

    thing-a-day 2010

  • These, along with the two-element interferometers such as the Keck Observatory, contribute valuable observations and science such as astrometry, stellar diameters, binary star orbits, stellar accretion disks, stellar mass loss, sunspots on other stars, and more!

    Archive 2009-02-25

  • The pipeline that read out the positions of all the objects on the sky, called the astrometric pipeline, was to be done by the U.S. Naval Observatory, which had a tradition in astrometry for navigation.

    A Grand and Bold Thing

  • Gaia will be, in my opinion, the greatest of all, observing stars down to 12th magnitude, and doing astrometry, radial velocity and spectrophotometry – all made to a higher precision.

    Obama to Unveil "Ambitous" Plan for NASA | Universe Today

  • Using astrometry to look for exoplanets has been around for 50 years, but it hadn't bagged a verified exoplanet – until, astronomers thought, earlier this year.

    Exoplanet Not Really There? | Universe Today


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  • B.B.C. News: 'The discovery of a Jupiter-like "exoplanet" orbiting the star VB 10 is the first to be made using the astrometry method. Astrometry is based on measuring small changes in a star's position.'

    June 1, 2009