It serves as a star chart and physical model of the visible half-dome of the sky. Its various functions also make it an elaborate inclinometer and an analog calculation device capable of working out several …

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astrolabe, any of a type of early scientific instrument used for reckoning time and for observational purposes. One widely employed variety, the planispheric astrolabe, enabled astronomers to calculate …

Aug 31, 2023 · The astrolabe is an astronomical instrument used from around the 6th century to measure time and position by determining the altitude of heavenly bodies like the Sun and certain stars.

May 25, 2022 · An astrolabe is an astronomical instrument used since ancient times. It consists of rotating discs and rulers to show the positions of astronomical objects at any given time throughout …

As Europeans began traveling farther distances across seas and oceans, they created a version of the astrolabe for maritime travel. Thus, the mariners’ astrolabe was born. It became widely used in …

Any instrument used to measure altitudes above the horizon can be called an astrolabe, although there is a major difference between the classic “planispheric astrolabe” and a “mariner’s astrolabe.” …

Mar 7, 2025 · An astrolabe is an ancient astronomical instrument used to measure time, track celestial bodies, and aid in navigation. It consists of a circular disk with a rotating star map and an adjustable …

Aug 27, 2025 · The astrolabe, a historical scientific instrument, served as an analog calculator for various astronomical problems. This ancient device, whose name means “star-taker” in Greek, …

Aug 28, 2025 · astrolabe (plural astrolabes) An astronomical and navigational instrument for gauging the altitude of the Sun and stars. quotations