The Sun

Abstract

The Sun, our nearest star, is the gravity center and ultimate energy source for many processes in our solar system. We give a physical description of the Sun, from inward to outward, starting with the solar interior, and continuing to the photospheric surface, the chromosphere, and to the corona, which displays eruptive phenomena such as flares, and coronal mass ejections, a rich realm of high-temperature plasma physics, magneto-hydrodynamics, and high-energy particle acceleration kinematics.