Mirzo Ulugbek was a sta- tesman, scientist, great as- tronomer and mathemati- cian, and a grandson of the (1) ... (Whose). He was born in 1394. In (2) Ulugbek became the ruler of Samarkand. (When), ... During this period, the city was one of the world centres (3) (What kind) of the Middle Ages. There was a scientific school, great astronomers and mathe-maticians. There was built a (4) ... (What), S- ti- which was the beginning of the architectural building of the Registan. Since young ages he rn Ulugbek was interested in (5) ... (What). Later he built a special building for its time, the fa- mous observatory. In (6) ... (When), Ulugbek ), created the catalogue of the sky, where (7) ne (How many) stars were described. In 1444, d. after thirty years of astronomical observations, ... e the great astronomer created his scientific work - "Ziji Kuragoniy". e B) Nowadays, Ulugbek's scientific work is stu- of died in (8) ... (Where) around the world. The great scientist made very important predic- tions in science.​