  The rate of stimulated inverse bremsstrahlung is calculated for low electron
density stellar plasmas and the condition under which the plasma becomes
transparent is presented. The stability of low density stellar plasma is
analyzed for a star with a spherical symmetry in equilibrium between the
gravitational attractive forces and the repulsive pressure forces of an ideal
electron gas where the analysis is developed by the use of Boltzmann
statistics. Fundamental and surprising results are obtained by which the radius
and the total mass of the star are inversely proportional to the square root of
the electron density in the star center. The total gravitational forces of the
star with very low electron and mass densities are very large (!) due to the
extreme large star volumes. The absorption and emission of radiation for
extremely low density star plasmas vanishes over all the entire electromagnetic
spectrum. The present results are supported by numerical calculations. Similar
effects are predicted for low density stellar plasmas which have different
structures and the properties of such plasmas might show certain similarities
with those of dark matter.
