Model for the inside of the Sun

It isn't easy to understand the interior of the Sun since we lack direct observations (with an important exception, to be discussed later).

We use a theoretical model. Some ingredients are

According to the theoretical models, the density and tempreature are low at the photosphere and increase toward the center.

According to the theoretical models, the energy transport is by photon radiation in the inside, by convection in the outer 1/4 of the Sun.

Davison E. Soper, Institute of Theoretical Science, University of Oregon, Eugene OR 97403 USA soper@bovine.uoregon.edu