Astrophysics of galaxies and stars. Galactic structure and dynamics; active nuclei; largescale structure. Elements of Newtonian and relativistic cosmology. Stellar atmospheres and spectral lines. Stellar interiors; nuclear energy generation; mainsequence and evolved stars. A-F only. Pre: 241, PHYS 274 (or concurrent), and MATH 243 (or concurrent) or 253A (or concurrent). (Spring only)