The first textbook to provide a fully integrated picture of the Sun, stars, the solar system and other planetary systems for advanced undergraduate students.As our nearest star, the Sun offers a unique opportunity to study stellar physics. Following the success of his previous books, Galaxies and The Stars, Roger Tayler presents the first fully integrated textbook on how studies of the Sun and the solar system help us understand stars in general and other planetary systems. Handy appendices give succinct derivations of relevant background theory, ensuring that this book is completely self contained. Altogether, this is an invaluable textbook for students studying the Sun, stars, the solar-terrestrial environment and the formation of planetary systems.As our nearest star, the Sun offers a unique opportunity to study stellar physics. Following the success of his previous books, Galaxies and The Stars, Roger Tayler presents the first fully integrated textbook on how studies of the Sun and the solar system help us understand stars in general and other planetary systems. Handy appendices give succinct derivations of relevant background theory, ensuring that this book is completely self contained. Altogether, this is an invaluable textbook for students studying the Sun, stars, the solar-terrestrial environment and the formation of planetary systems.Using mathematics appropriate for advanced undergraduate students in physics, this textbook provides a broad and wide-ranging introduction to the Sun as a star. Tayler provides succinct derivations of key results--such as the properties of spectral lines, the theory of stellar oscillations, plasma physics, magnetohydrodynamics and dynamo theory--in nine handy appendices, ensuring that the book is completely self contained. Altogether, this is an invaluable textbook for students studying the Sun, stars, the solar-terrestrial environment and the formation of planetary systems.Symbols; Numerical values; 1. Introduction; 2. Observal3U