ASTR 3730 and 3830 provide a year-long introduction to physical processes, observations, and current research methods in stellar, interstellar, galactic, and extra-galactic astrophysics, with astronomical applications of gravity, radiation processes, spectroscopy, gas dynamics, and plasma physics. Prereqs. or coreqs., PHYS 2130 or 2170, and MATH 2400 or APPM 2350. Elective for APS major and minor.