Introduction to general relativity & cosmology. Spacetime metrics, geodesics, Einstein field equations, black holes. Geometry of the universe, redshift, cosmological distances. Cosmological models, dark matters, dark energy. Big Bang nucleosynthesis, recombination, cosmic microwave background, inflation. Pre: PHYS 274; MATH 244 (or concurrent) or MATH 253A (or concurrent). Recommended: 242. (Alt. years: fall) (Cross-listed as PHYS 470)