‘The Solar System’ investigates how long people have been aware of the planets, when planets were first identified, when their distance from Earth was first estimated, and how. What is a planet? How are planets made? What are migrating planets? At what point did we realize that the planets, including Earth, travel around the Sun? Who was Johannes Kepler, and what is the significance of his three laws of planetary motion? An overview is given of the Solar System, the Sun and the planets. The importance of planets' satellites is explored and objects of other types, such as asteroids, trans-Neptunian objects, and comets are placed in context.