Extragalactic Astrophysics synthesizes the most important topics in the field of extragalactic astrophysics at the advanced undergraduate and graduate level, providing the reader with the foundation and tools for research in any of these areas. It attempts to cover a broad range of topics for a graduate-level class in a physics department where students’ available credit hours for astrophysics classes are limited. The sections cover galactic structure, external galaxies, galaxy clustering, active galaxies, general relativity and cosmology.