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 …

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 …

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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 …

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.”

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, …

Definition An astrolabe is an ancient astronomical instrument used to measure the altitude of celestial bodies and determine latitude. This tool played a crucial role in navigation and astronomy, allowing …

Nov 19, 2023 · At its heart, the astrolabe consists of a large circular metal plate called the mater that sits vertically on a stand. Both sides of the plate are etched with calibrated circles, lines, and scales that …

The planispheric astrolabe is the most important and versatile instrument made in antiquity for the analogical performance of astronomical computations that would otherwise have been long and …