Date of introduction into obіg: February 10, 2021 Nominal 5 Metal nickel silver Masa, g 16.54 Diameter, mm 35.0 Category of hardness carburation special uncirculated Edge corrugated Circulation, pcs. 35000 Series: Other coins Dedicated to the scientific and research institute “Mykolaiv Astronomical Observatory” - one of the oldest observatories of Western Europe, founded by 1821 Rotsi as a naval observatory with a method of providing the Black Sea Fleet with time, maps and training of naval officers in astronomical methods of orientation. The history of the development of the Mykolayiv Observatory is associated with the most important task in astronomy - the creation of the celestial Fundamental coordinate system, which lies in the created series of Fundamental catalogs, which were the result of collective Zusil observatory of the world, based on millions of nearby precautions and the value of the coordinates of the stars, extending around 200 rocks. The main directions of the activity of the daily installation are the tracking of objects in the near-terrestrial space, the dynamics of the bodies of the Sun system, the creation of astrometric catalogs of stars, information support for astronomical tracking and astronomical adjustment.