Science News, February 28th, 1987
Star Tracks
Astrometry, the determination of thelocations of celestial bodies, is a fundamental, if somewhat unglamorous, part of astronomy. It is probably the oldest astronomical activity, having begun the first time an observer made note of the location a star accurately enough to be able to find it the next night. Accurate astrometry lies at the foundation of the science of mechanics as developed by Kepler, Galieo and Newton.
Astrometry is also at the basis ofastrophysics and cosmology. It has direct methods of measuring the motions of stars and the distances to them. It gave us our fir...
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