Physics Prelude. Orbits in the Solar System. Orbits Outside the Solar System. Special Relativity. Particles and Forces. Stars. Radiation Processes. Cosmology. Part I: The Solar System. Celestial Mechanics and the Solar System. The Solar System in Perspective. The Dynamics of the Earth. The Earth-Moon System. The Terrestrial Planets: Mercury, Venus, And Mars. The Jovian Planets. Small Bodies and the Origin of the Solar System. Part II: The Stars. Electromagnetic Radiation and Matter. Telescopes and Detectors. The Sun: A Model Star. Stars: Distances and Magnitudes. Stars: Binary Systems. Stars: The Hertzsprung-Russell Diagram. Part III: The Milky Way Galaxy. Our Galaxy: A Preview. The Interstellar Medium and Star Birth. The Evolution of Stars. Star Deaths. Variable and Violent Stars. Galactic Rotation: Stellar Motions. The Evolution of Our Galaxy. Part IV: The Universe. Galaxies Beyond the Milky Way. Hubble's Law and the Distance Scale. Large-Scale Structure in the Universe. Active Galaxies and Quasaars. Cosmology: The Big Bang and Beyond. The New Cosmology. Hale-Bopp Comet Update. Appendices.