Hipparcos was a scientific satellite of the European Space Agency (ESA), launched in 1989 and operated until 1993. It was the first space experiment devoted to precision astrometry, the accurate measurement of the positions of celestial objects on the sky. This permitted the accurate determination of proper motions and parallaxes of stars, allowin...
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Earth-orbiting satellite launched by the European Space Agency in 1989 that over the next four years measured the distances to more than 100,000 ... [1 related articles]
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A European Space Agency satellite, launched in 1989 and designed to carry out astrometric surveys to an unprecedented degree of accuracy. Its name is an acronym for High Precision Parallax Collecting Satellite and was chosen for its (somewhat strained) similarity to that of the Greek astronomer Hipp...
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HIgh Precision PARallax COllecting Satellite, a space telescope specifically designed to measure distances to stars using parallax
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Satellite launched by the European Space Agency to orbit the Earth from 1989 to 1993. Named after the Greek astronomer Hipparchus, it was the world's first astrometry satellite, mapping the precise positions, distances, colours, brightnesses, and apparent motions of stars. This resulted in a catalogue of more than 2.5 million stars, published i...
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