Astrolabe is an instrument used to measure the position of stars and planets in the sky. It helped people find direction and determine time by observing the stars. The device is made of metal plates with markings and moving parts. It was used by astronomers, navigators, and travelers.

Astrolabes were used in regions such as the Middle East, North Africa, and Europe. They were important tools for navigation and study of the sky. Different designs were developed in different cultures.

The astrolabe has been used since ancient times and became widely used during the Middle Ages. It was an important tool before modern navigation instruments. Today, it is studied as a historical scientific instrument.