Quasars and the activity of galactic nuclei . Wilkowski E. I. Quasars occupy a special place among the most interesting celestial objects discovered by modern astrophysics. These are the most powerful, remotest, and perhaps least understood objects in the universe. The book introduces the reader to the history of the discovery of quasars, the development of their research and the search for an explanation of their mysterious properties. Considering the quasar phenomenon as part of a more general phenomenon of the activity of galactic nuclei, the author talks about the research of active nuclei, their classification, different approaches to their interpretation and the possibility of explanation from a single point of view. For persons with secondary education, senior schoolchildren, students, teachers, lecturers and all interested in the achievements of astronomy . The book was scanned and kindly provided by nauelectro