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Astrolabe | Definition, History, Facts | Britannica 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 the position of the Sun and prominent stars with respect to both the horizon and the meridian
Astrolabe - World History Encyclopedia 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
A beginners guide to the astrolabe - BBC Sky at Night Magazine 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 the year
The Astrolabe: A Mathematical Jewel | UC Geography “Astrolabes are used to show how the sky looks at a specific place at a given time This is done by drawing the sky on the face of the astrolabe and marking it so positions in the sky are easy to find To use an astrolabe, you adjust the moveable components to a specific date and time
Astrolabe Guide: How It Works Why It’s ImportantDeluxe Astrology 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 sighting arm, allowing users to calculate the position of the sun, stars, and planets
Mariners Astrolabe - Ages of Exploration 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 Europe in the late Middle Ages and Renaissance, peaking in popularity in the 15th and 16th centuries
MHS Astrolabe home page The Museum of the History of Science houses the world's largest and most important collection of astrolabes With ancient origins and a two thousand year history, the astrolabe illuminates astronomy, time-telling, astrology and religion across cultures, time and place
How Astrolabes Work - HowStuffWorks With an astrolabe, astronomers could calculate the position of objects in celestial spheres, the time of day (or night), the time of year, the altitude of any object, different latitudes, and much more