"Version: 20201201"--Title page verso.Includes bibliographical references.The challenges in understanding the diversity of rocky planets -- 1. Observations of exoplanets / Elizabeth J. Tasker and Yuka Fujii -- 2. Formation of a rocky planet / Elizabeth J. Tasker -- 3. Magnetic fields on rocky planets / Matthieu Laneuville, Chuanfei Dong, Joseph G. O'Rourke and Adam C. Schneider -- 4. The heat b…