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an instrument formerly used to measure the altitude of stars and planets [Greek astron star + lambanein to take] An ancient instrument used widely in medieval times by navigators and astronomers to determine latitude, longitude, and time of day. The device employed a disk with 360 degrees marked on its circumference. Users took readings from an indicator that pivoted around the center of the suspended device like the hand of a clock. The astrolabe was a navigational instrument formerly used for taking bearings of the sun and stars replaced by the sextant in the 18th century I hope this helped dude...

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16y ago

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