ASTROLABES
- ASTROLABE, a medieval instrument, now replaced by the sextant, that was once used to determine the altitude of the sun or other celestial bodies [n]
- An instrument formerly used to make astronomical measurements, typically of the altitudes of celestial bodies, and in navigation for calculating latitude, before the development of the sextant. In its basic form (known from classical times), it consists of a disk with the edge marked in degrees and a pivoted pointer
- ASTROLABE, a compact instrument used to observe and calculate the position of celestial bodies before the invention of the sextant [n]
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