A survey of modern topics in astronomy with an emphasis on developing conceptual models for the fundamental laws of gravity and motion underpinning the structure and evolution of the universe. Topics include lunar phases, eclipses, planetary motion, exoplanets, formation of planetary systems, star formation, supernovae, white dwarfs, neutron stars, black holes, growth of galaxies, dark matter and the expansion of the universe. Cross Listings: ASTR 150, PHYSICS 150, PHY-SCI 150.