On 21 April the Permanent Delegation of Russia to UNESCO in co-operation with the other partners carried out at UNESCO Headquarters a number of cultural and scientific events to celebrate the 50th Anniversary of the orbiting space trip by cosmonaut Yuri Gagarin - memorable date of the organization. The main event of the celebrations was the International Forum on the Peaceful Use of Outer Space for science, education and culture with the participation of the famous Russian cosmonaut V. Tereshkova, G. Grechko, A. Serebrov, S. Krikalev and the astronauts from the USA, France, Poland, Germany, India, Nigeria and other countries. The vice-president of the Russian Academy of Natural Sciences S. Kapitza, the Chairperson of the UNESCO Executive Board, the Permanent Delegate of the Russian Federation to UNESCO E. Mitrofanova, the Assistant Director-General of UNESCO H. d’Orville spoke at the inauguration of the Forum. The scientists, politologists and historians, the permanent delegates to UNESCO, Russian and French journalists discussed various aspects of modern space science, the long-distance space prospects, and the possibilities to use the obtained results of space researches for the sustainable development. The Director General of UNESCO I.Bokova underlined that Manned Mission to Space was the first step in outer space studying and quoted the words of Yuri Gagarin in his speech in September 1963 at UNESCO: "by reaching the Outer Space, I wanted to make a contribution to science, to enrich it with new facts about the outer space. My flight was for the peaceful uses of outer space. Let me hope that UNESCO's future activities will also contribute to the further development of science, including the science of outer space." The Director General of UNESCO I.Bokova, the Permanent Delegate of Russia to UNESCO E.Mitrofanova and the Deputy Head of the Federal Agency for CIS, Compatriots and International Humanitarian Cooperation (Rossotrudnichestvo) A .Chesnokov participated in the Inauguration ceremony of the cultural program. Mrs. E.Mitrofanova said in particular that the flight of Yuri Gagarin into Space had totally changed the development of the whole mankind, and expressed satisfaction with the fact that this year the UN has officially declared the 12th of April as the International Day of Human Space Flight. During this evening the ceremony awarding the finalists and winners of the World Space Contest "Star Race" launched by the Russian Federal Agency Rossotrudnichestvo took also place. The guests also saw the unique “Astro-Ballet” performance with the participation of the international team (Russia, Ukraine, and USA), musical performances by the Prague Philharmonic, the Boerte Group from Mongolia and China. The exhibition of the space-related materials and photos dedicated to Yuri Gagarin, models of spacecraft “Vostok-1” and “Soyuz” prepared by the Russian Space Agency was demonstrated that day at the UNESCO Headquarters. There were also presented materials from NASA, the European Space Agency, Telescope Science Institute and private collections. The program of these events was organized with the sponsorship of the Roscosmos and Rossotrudnichestvo, as well as the Melody for Dialogue among Civilizations Association and the Bureau of Strategic Planning of UNESCO Secretariat.