"The project of strategic partnership “Universe to reach? In planetarium!"" connected partners from 6 European countries who are dedicated to education in technical and natural sciences and who encourage interest in these disciplines and critical thinking in public. It buildt on previous projects of bilateral mobilities, Erasmus+, and focused on astronomy and space technologies. Each of the partners is a leader in its region for lifelong learning and the joint project enabled them to start international cooperation with a large outreach. Astronautics has a truly exceptional position among natural and technical sciences. Although it is actually fully rational, in its core it is very hardly understandable for the ordinary mortals, having a strong influence on the emotions and imagination. With a few exceptions, sky and space fascinate everybody: amateurs and professionals, the smallest and the oldest; looking at images from orbital stations or from the Moon has an obvious emotional charge. Space research is connected with a number of fundamental problems of human existence; it often extends into the philosophy and touches upon religious issues. The project fited into the ideas of the space strategy for Europe. In accordance with the horizontal priority of the Erasmus Open programme and innovative practices in a digital era, the subject of our project was extending and developing educators' competences and increasing the ability to provide supply for demand through effective outreach, guidance and motivation strategies. Specifically, the project had to increase the competences of planetarium employees. Partial focus of cooperation included getting to know the conditions and the process of creating innovative fulldome programmes in major planetariums (with a particular emphasis on dramaturgy and visual aspects of the programmes), the appearance and daily operation of interactive exhibitions, the digital projection technology including its technical aspects, further development, etc.; also getting to know the system of individual education in astronomy including the support of talented individuals and especially cooperation in the area of creating the first joint intellectual output - the programme for digitaria (the so-called fulldome format) named Satelix, on the theme astronautics and space technologies. The project was innovative: connecting the makers to produce a transferable and compatible programme for digitaria is an extremely challenging step in the field of ICT; but it is also efficient in terms of costs and resources. The resulting programme in several language versions, shared by dozens of planetariums, brought about considerable cost savings, while embracing tens of thousands of spectators. International cooperation was deepen among the partners, who are experts in this method of audiovisual projection in their respective states. Planetariums - as unique audiovisual facilities for the promotion and publicity of science - used to be financed by public funds in Europe. This project enabled them to have a superior programme for a wide range of visitors. Newly acquired information, knowledge and experience from visits to partner institutions (shadowing, professional discussion) and from the joint production of the digital programme will be used by the involved partners also in the creation of other new educational programmes for all age groups of their regular as well as random visitors. By this, they can contribute to the development of lifelong learning not only in the cities, where the involved planetariums are located, but also in entire regions, where these institutions have their exclusivity. The total of 7 project meetings took place to enable the transfer of know-how and good practice and during the preparation of the product according to the defined technical parameters; each time 2 educators from each partner country and 3 local experts participated in the meetings. We also implemented one big multiplication event with the participation of more than 150 people. 13 employees were involved in the product creation according to the above methodology; i.e. there are 98 supported experts, who participated in a unique mindset output and its international dissemination. The resulting synergies will be used in the creation of another joint output; after the project termination, we expect further networking and cooperation on production of portable fulldome programmes at the international level and networking in the future ahead."