In the summer of 1989, the European Space Agency launched the High Precision Parallax Collecting Satellite—Hipparcos, for short. The name of this first automated astrometry orbiter honors Hipparchus of Nicea, who diligently compiled a catalog of the celestial positions and brightnesses of more than a thousand stars in the second century BC.
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© 1997 American Institute of Physics.
1997
American Institute of Physics
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