The lecture is dedicated to the main obstacles in the way of space exploration. In movies, books, and news about space programs, flights to other worlds are often presented as a technological challenge. However, the main problem of a months-long expedition into space is not so much the distance or fuel supply, but human health. The crew will have to live in extreme conditions while maintaining performance and psychological stability. Entrepreneur and scientist Pavel Korolev will talk about the real barriers to interplanetary flights. Among them are cosmic radiation, the effects of weightlessness on muscles and bones, physical overload, limited space, prolonged isolation, and the need to make decisions in an environment where a mistake can be very costly. Therefore, even advanced technologies do not yet make deep space accessible. The lecture combines scientific specificity with clear presentation. Listeners will be able to view space travel not as an impressive fantasy, but as a complex engineering, medical, and psychological challenge. It will be interesting for schoolchildren, students, astronomy enthusiasts, and science fiction fans. The meeting is part of a series prepared in collaboration with the Summer Space School. Find other events in Moscow on KudaGo.