Book X. Alvena, Nobel laureate, foreign member of the Academy of Sciences of the USSR, and Professor G. Arrenius contains a detailed description of the theory developed by the authors of the formation and subsequent evolution of our planetary system. These questions are of exceptional interest both for the development of our knowledge and for practice, since they are closely related to the geological history of the Earth and the understanding of its internal structure. Particular attention is paid to magnetohydrodynamic and other effects in plasma, as well as chemical reactions and condensation processes. The book will be of great interest to a wide range of specialists - astrophysicists, geophysicists, geochemists, chemists, mechanics, as well as for persons interested in the achievements of modern science.