The Medieval Device That Did Everything
The astrolabe was a star chart, calculator, and measuring tool all in one metal disc. Long before apps, people used it to find stars, tell time, work out latitude, and even navigate.Astrolabe: The Ancient World's Analog Computer
You Could Use It Day or Night
By sighting the Sun or a star, the astrolabe could measure how high it was above the horizon. That helped people identify stars, estimate local time, and figure out their latitude.Astrolabe: The Ancient World's Analog Computer
