Describe in general the structure and interior density pressure and temperature conditions of an average star such as the Sun?

Answer 1

The interior of an average star is modeled after the theoretical pressure, temperature, and density conditions that would be necessary to produce the observed energy and light from the surface. The interior can be described as (1) the core, (2) a radiation zone, and (3) the convection zone. The core is a dense and very hot region where the density fo the core is about 12 times that of solid lead. The radiation zone is less dense and energy in the form of gamma and x rays from the core is absorbed and reemitted by collisions with atoms in this zone. The convection zone begins about seven-tenths of the way to the surface, where the density of the gases is about 1% of the density of water. Gases at the bottom of this zone are heated by radiation from the radiation zone below, expand from heating, and rise to the surface by convection.