WORLD HISTORY

Detailed explanation-1: -The astrolabe is a portable wooden or metal astronomical instrument which is used to measure the positions and altitudes of celestial bodies, to find the observer’s time or latitude, or to solve other mathematical problems.

Detailed explanation-2: -An astrolabe can only measure angles in a vertical plane and was principally used for latitude-finding, although you can also use it for purposes such as finding the height of something.

Detailed explanation-3: -an astronomical instrument for taking the altitude of the sun or stars and for the solution of other problems in astronomy and navigation: used by Greek astronomers from about 200 b.c. and by Arab astronomers from the Middle Ages until superseded by the sextant.

Detailed explanation-4: -The mariner’s astrolabe is an ancient navigation instrument for measuring celestial altitude (celestial altitude is the “height” of a star, planet or other celestial object above the horizon).

Detailed explanation-5: -Arabs introduced the astrolabe to the European continent through Andalusia in the 11th century. The tool carried the knowledge of Muslim scientists and greatly affected astronomy studies in Medieval Europe, contributing to modern scientific progress.