  In this work, a liquid model of the Sun is presented wherein the entire solar
mass is viewed as a high density/high energy plasma. This model challenges our
current understanding of the densities associated with the internal layers of
the Sun, advocating a relatively constant density, almost independent of radial
position. The incompressible nature of liquids is advanced to prevent solar
collapse from gravitational forces. The liquid plasma model of the Sun is a
non-equilibrium approach, where nuclear reactions are free to occur throughout
the solar mass. The primary means of addressing internal heat transfer are
convection and conduction. As a result of the convective processes on the solar
surface, the liquid model brings into question the established temperature of
the solar photosphere by highlighting a violation of Kirchhoff's law of thermal
emission. Along these lines, the model emphasizes that radiative emission is a
surface phenomenon. Strong evidence is provided that the Sun is a high
density/high energy liquid plasma. This evidence is based on our knowledge of
Planckian thermal emission and condensed matter, including the existence of
pressure ionization and liquid metallic hydrogen at high temperatures and
pressures. The equations of magnetohydrodynamics are invoked as the proper
vehicle for the understanding od stellar convection and structure. Prior to
introducing the liquid plasma model, the historic and scientific justifications
for the gaseous model of the Sun are reviewed and the gaseous equations of
state are also discussed.
