Horizons: exploring the universe

Part 1: The sky. Here and now; A user's guide to the sky; Cycles of the sun and moon; The origin of modern astronomy; Light and telescopes

Part 2: The stars. Atoms and spectra; The sun; The family of stars; The formation and structure of stars; The death of stars; Neutron stars and black holes

Part 3: The universe of galaxies. The milky way galaxy; Galaxies: normal and active; Modern cosmology

Part 4: The solar system. Origin of the solar system and extrasolar planets; Earth and moon: bases for comparative planetology; Mercury, Venus, and Mars; The outer solar system; Meteorites, asteroids, and comets

Part 5: Life. Astrobiology: life on other worlds.