This well-illustrated monograph is devoted to classic fundamentals, current practice, and perspectives of modern plasma astrophysics. The first part of the book is unique in covering all the basic principles and practical tools required for understanding and work in plasma astrophysics. The second part represents the physics of magnetic reconnection and flares of electromagnetic origin in space plasmas in the solar system, single and double stars, relativistic objects, accretion disks, their coronae. The level of the book is designed mainly for professional researchers in astrophysics. The book will also be interesting and useful to graduate students in space sciences, geophysics, as well as to advanced students in applied physics and mathematics seeking a unified view of plasma physics and fluid mechanics.