In astrophysics the concepts of classical and modern physics are applied to the study of astronomy, providing a physical basis for understanding the components and structure of our universe. Topics covered in Astrophysics II include: the Milky Way, galaxies and galactic structure, active galactic nuclei, high energy phenomena, dark matter, and an introduction to cosmology. Prerequisite: PHYS 130 and either PHYS 104 or 320 and either PHYS 210 or 220, and MATH 152.