The latest observations and theoretical models are combined in this clear, pedagogic textbook for advanced undergraduates and graduate students.

How can we test if a supermassive black hole lies at the heart of every active galactic nucleus? What are LINERS, BL Lacs, N galaxies, broad-line radio galaxies

The last 50 years have seen a tremendous progress in the research on quasars. From a time when quasars were unforeseen oddities, we have come to a view that con

Understanding the energy source and physical processes within active galaxies are the most challenging areas of current research. Using a logical format and eas

All galaxies host a super-massive black hole in their center. These black holes grow their mass in symbiosis with their host galaxy and moderate their star form