Ulugh Beg builds the Samarkand Observatory (1 янв 1424 г. – 1 янв 1429 г.)

Описание:

Between 1424 and 1429, the great astronomer Ulugh Beg built the Samarkand Observatory. The sextant was 11 meters long and once rose to the top of the surrounding three-story structure, although it was kept underground as protection from earthquakes. Calibrated along its length, it was the world's largest 90-degree quadrant at the time. While the observatory was destroyed by religious fanatics in 1449, scholarly astronomical study continued in Samarkand for some 75 years and it was rediscovered in 1908 and has since been renovated.