"Version: 20160401"--Title page verso."A Morgan & Claypool publication as part of IOP Concise Physics"--Title page verso.Includes bibliographical references.Preface -- 1. Exploring Earth and beyond -- 1.1. Curiosity -- 1.2. Observations from afar -- 1.3. Personal visits -- 1.4. Robotic visits2. The ABC of exoplanets -- 2.1. What is a planet? -- 2.2. What is an exoplanet? -- 2.3. Detecting exopl…