The book “High-temperature gas-cooled nuclear reactors in space energy”, created by the team of authors, is a unique and in-depth study that opens up new horizons in the field of nuclear energy and its applications in space technologies. This work not only illuminates theoretical aspects, but also offers practical solutions that can change the approach to energy support for space missions. In recent decades, the space industry has been actively developing new technologies, and nuclear energy is becoming increasingly relevant. The book invites the reader to immerse himself in the world of high-temperature gas-cooled reactors (HCRs), which can provide reliable and efficient power supply for long-term space flights, including missions to Mars and other distant planets. The authors examine in detail the operating principles of these reactors, their advantages over traditional energy sources and potential applications in space. This book will be of interest not only to specialists in the field of nuclear physics and space engineering, but also to students, graduate students, as well as anyone interested in modern technologies and the future of space research. Readers who are passionate about sustainable development, alternative energy and innovative technologies will find many useful and inspiring ideas in it. The book can also attract the attention of researchers working in the field of energy, as well as representatives of public and private organizations involved in space projects. The topics raised in the book cover a wide range of issues, ranging from the physics of nuclear reactors to the environmental aspects of their use. The authors discuss not only the technical characteristics of GGR, but also their safety, economic efficiency and environmental impact. This makes the book an important contribution to the discussion about the future of energy and its role in space exploration. Given the growing energy demand and limited resources of the Earth, nuclear technology can be the key to solving many problems. The style of the authors is distinguished by scientific accuracy and accessibility, which allows the reader to easily assimilate complex concepts. The book is full of graphs, diagrams and examples from real practice, which makes it not only informative, but also visually attractive. The team of authors consists of leading experts in the field of nuclear energy and space technologies, which gives the work additional value and authority. If you are looking for literature that combines deep scientific