Definition of ASTROMETRY

Examples of astrometry in a Sentence

Recent Examples on the Web More tantalizing support emerged in 2018 from the European Space Agency’s Milky Way–mapping Gaia satellite, which uses a technique called astrometry to precisely track the position of Proxima Centauri—and billions of other stars—across the sky. — Lee Billings, Scientific American, "The Curious Case of Proxima C," 15 Jan. 2020 Breakthrough Watch is also pursuing a separate mission called TOLIBOY, tentatively set for a 2021 launch, which would search for planets by precisely mapping the motions of Alpha Centauri A and B using a technique called astrometry. — Corey S. Powell, Scientific American, "The Hunt Is on for Alpha Centauri’s Planets," 5 Aug. 2019 Byrd explains that Gaia studies the motions of individual stars using a technique called astrometry. — Jason Daley, Smithsonian, "2.8 Million Stars Sparkle in This Incredible Image of the Milky Way," 6 Sep. 2017 Measuring these shifts, or parallaxes, lets astronomers calculate the stars’ actual positions and movements through the galaxy with great precision, a field of study called astrometry that Gaia and its predecessor Hipparcos have revitalized. — Michael Greshko, National Geographic, "New Milky Way Map Is a Spectacular Billion-Star Atlas," 14 Sep. 2016

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