These then orbit the central bulge of our galaxies to make up its structure that one can quite clearly see that such matter ejections has the ability to create the spiral arms of a barred galaxy or spiral galaxy or elliptical galaxy . But how do you explain the variations in these galactic morphologies. Only a few Spirals have distinct arms, the Grand Design Spirals. About the same number have bars. The majority of spirals are called flocculent with little or no structure in the arms.
Spirals have large amounts of gas dust in the arms with the arms revolving as rigid bodies.
Ellipticals on the other hand have little or no gas dust in them and the motion of the stars is random. So how do you explain the black body spectra of stars and more importantly, the solar wind, photons and neutrinos consistent with nuclear fusion in the core. The relaxation time of a gravitationally collapsing star is too short to explain stellar life times. It also does not explain everything else observed in stars. The outer heat not letting room for the escape of spent fuel would eventually breakthrough to create the sunspots as with our sun cycle Bzzt, How does spent fuel break through a region that is burning.