Meaning & use
astrometry
The branch of astronomy concerned with precisely measuring the positions, distances, and motions of stars and other celestial bodies.
See it in a sentence
Astrometry allowed scientists to detect a tiny wobble in the star's position caused by an orbiting planet.
Modern astrometry relies on space telescopes that can measure star positions far more accurately than ground observatories.
A note on using this word
Astrometry is one of the oldest branches of astronomy and remains essential for mapping stars and confirming exoplanets.
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