It was built by the order of Ulugbek in 1428-29 on the top of Kohak (Choponota) in the form of a huge cylinder; according to some manuscripts (“Boburnoma”), the score. It is built as a 30,4-storey building of 3 m. It contained more than a dozen different astronomical devices and instruments. The most important of these is the quadrant (or close to the sextant) device, which consists of a double arc with a radius of 40,2 m. Quadrantningjan. part underground, the rest pants. 30 m Cha above ground level on the side
high-rise One degree arc around the tool circle is 701 85 mm and one minute arc is 11,53 mm. The main constants of instrumental astronomy, which were also unique in terms of instrumentation in the Middle Ages, made it possible to measure the angle between the equator and the ecliptic, determine the annual precession constant, tropical year duration, and other fundamental astronomical constants. The observatory had small-sized instruments: an armillary sphere, measuring instruments consisting of 2, 4 and 7 rings, a triangula, sun and star clocks, an asturlob and others. Using this scientific equipment, the Sun, Moon, planets and individual stars were observed. Mirzo Ulugbek's largest astronomical work was created at the Ziji Koragoniy observatory. Its construction and subsequent scientific activity are connected with the names of a number of famous scientists Giyosiddin Kashi, Qazizoda Rumi, Ali Kushchi and others, collected at the suggestion of Ulugbek.
Archaeological remains of Ulugbek Observatory 1908 It was found during excavations led by VL Vyatkin. In particular, the presence of a circular wall with a diameter of 48 m and a thickness of one brick, and the remains of a huge main device consisting of a double arch in the center of it were found. It had large halls, various large and small rooms. According to my grandfather, the Ulugbek Observatory is decorated with high-quality tiles and mysterious rivets. The Sun, Moon, planets and stars were studied with great precision using a very large instrument built into the observatory. The observatory also had a library. On the inner wall is an image of the sky, a map of the stars, a mountain, a sea; developed an image of the globe marked by countries.
It was later left unattended and destroyed in the 1964th century. Now comes a large instrument in the Ulugbek Observatory - Il m with the height of the underground part of the square. XNUMX y. The Ulugbek Museum was opened near the Ulugbek Observatory. Uzbek and foreign scientists are conducting research on the original appearance, interior and main structure of the Ulugbek Observatory.
