I. The sky -- Here and now -- The sky -- Cycles of the sky -- The origin of modern astronomy -- Light and telescopes -- Atoms and starlight -- II. The solar system -- The solar system: an overview -- Terrestrial planets -- Jovian planets, Pluto, and the Kuiper belt -- Meteorites, asteroids, and comets -- III. The stars -- The sun -- The family of stars -- The formation and structure of stars -- The deaths of stars -- Neutron stars and black holes -- IV. The universe of galaxies -- The milky way galaxy -- Galaxies -- Active galaxies and supermassive black holes -- Modern cosmology -- V. Life -- Life on other worlds

1. Astronomy
2. Astrophysics