"Version: 20180501"--Title page verso."A Morgan & Claypool publication as part of IOP Concise Physics"--Title page verso.Includes bibliographical references.1. Introduction -- 1.1. Planetary nebulae -- 1.2. Discovery and history -- 1.3. Components of planetary nebulae2. Formation of planetary nebulae -- 2.1. Planetary nebulae as a stage in stellar evolution -- 2.2. Proto-planetary nebulae -- 2.…