Question

what do you understand by astrolabe
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Answer 1

Explanation:

noun. an astronomical instrument for taking the altitude of the sun or stars and for the solution of other problems in astronomy and navigation: used by Greek astronomers from about 200 b.c. and by Arab astronomers from the Middle Ages until superseded by the sextant

Answer 2

an instrument used to make astronomical measurements, typically of the altitudes of celestial bodies, and in navigation for calculating latitudes