Mirzo Ulugbek is a Ruler and a Scientist

The purpose of writing this monograph is that our university is named after Mirzo Ulugbek. By the 630th anniversary of Mirzo Ulugbek's birth, readers should also learn about his contribution to mathematics. "Zij" consists of four works and was translated into Uzbek for the first time. The first book is devoted to chronology and calendars. The book contains information about the Chinese, ancient Turks, Persians, Greeks and Arabs. The second book is about spherical astronomy and mathematical geography, and presents tables of mathematics and geography. The third book is about planetary motion and stellar astronomy - there is a catalog describing the tables of planetary motion and spherical coordinates of 1018 stars. All tables are easily interpreted for a period of two thousand years before and after the creation of "Zij" (1437). The fourth book is devoted to astrology, description of horoscopes. Ulugbek founded two madrassas in Samarkand: one as part of the Registan ensemble, the other as part of the Gori Amir ensemble. Among other great scholars, Ulugbek himself lectured once a week in each of these madrassas. The rest of the time was devoted tomore astronomical observations, work on "Zij". Until recently, he was considered only an astronomer and mathematician. But at the end of the 20th century, his activity intensified, and it turned out that he also wrote on history, poetry and music. Ulugbek also wrote poetry. Ulugh Beg's star map was the rarest and most perfect map of the Middle Ages. "Zij" had a great influence on the work of scholars of its time. Ali Kushchi, Miram Chalabi and Hussein Birjandi wrote a review of Ulugh Beg's "Zij". According to information, there are about 100 Persian and more than 15 Arabic copies of Ulugh Beg's "Zij". No astronomical or mathematical work written in the Middle Ages was so widely distributed. This translation of Ulugbek's "Zij" is provided with commentaries using medieval information from Nizamiddin al-Birjandi (1523). In this monograph, the birthplace and life of Ulugbek is taken from volumes 4, 7 and 11 of the Uzbek Encyclopedia. His scientific and cultural heritage was studied. In addition, information was obtained from Ulugbek Muhammad Taragay ibn Shahrukh "Zizhi Jadidi Guragoni" 2nd edition. Not everyone has the opportunity to read this book, so the monograph provides brief information. In this monograph, I wrote about the comparison of data obtained from the roofs and how scientists explain their research. An interested reader can also read information on the Internet to get more information. 3 Guests of Samarkand should definitely visit the Ulugbek Observatory. Ulugbek's childhood and youth are also covered. One of Ulugbek's contributions to science is one of the madrassas he built in Bukhara and Samarkand. The place he created in Samarkand is the Samarkand Observatory. He taught at the Ulugbek Academy once a week. The events of Ulugbek's reign are also covered. The appearance of "Zij" is shown in the life of Ulugbek. There is also information about the works of scientists who contributed to "Zij". In addition, information on the roofs of the book "Bases" is also given with brief comments. We use it in schools and universities.