astrometry

thumb|360x360px|Using optical interferometry to determine precise positions of stars. Courtesy NASA/JPL-Caltech

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Astrometry is the branch of astronomy that measures the precise positions and movements of stars and other celestial objects in the sky. It matters because these precise measurements help us understand the distances to stars, track their motions through space, and discover objects like exoplanets that orbit distant stars.

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Image: Interferometric astrometry.svg

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Commons category: Astrometry

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thumb|360x360px|Using optical interferometry to determine precise positions of stars. Courtesy NASA/JPL-Caltech

Astrometry is a branch of astronomy that involves precise measurements of the positions and movements of stars and other celestial bodies. It provides the kinematics and physical origin of the Solar System and this galaxy, the Milky Way.