Here is my theory.
If you look at our solar system, the observation of the inner planets being higher in heavy materials, followed by an asteroid belt, then by more gaseous planets, suggests our sun is the second manifestation of an original star, Sun I, which went nova, but less than super nova. What formed was the modern Sun II, and our solar system.
If we gave all the materials in expanding Sun I, the same kinetic energy, such that all the material had the same momentum, which is MV, the heaviest materials would have the slowest velocity and should stay closer to the original center. What we have today is Sun II, with planets. This explains the low ratio of supernova to heavy planets.
One thing that suggested this scenario are the observation of sun spots and solar flares within our modern sun. The easiest explanation for these phenomena are solar flares represent a fuel surge and sun spots represent fuel starving. Both appear to occur at the local level and can be correlated to local rate of diffusion of fuel to the inner fusion core.
The analogy is a fireman opening a door to a building fire. The air flows in and we get an explosion or backdraft; solar flare coming out the open door. On the other hand, if there was a building fire with all open doors and you shut one, that area will use up the air faster. It is still be hot but the fire will go down. This gives us sun spots.
Relative to Sun I, there was a huge backdraft which caused Sun I to send a lot of material into space. It was sort of a fusion hammer affect that breaks open windows and doors, but the basic building structure was still standing. The sun represents about 99% of the mass of the solar system. It only had to break out the windows to make the rest of the solar system.
What could caused fuel restriction to set up massive fusion hammer? Logically, it has to do with packing density. If we compare atoms on earth the volumes are very close so atomic mass decides higher or lower density. But with fully ionized and partially ionized atoms, partially ionized can have a lower density even with higher nuclear mass, because of inner orbital electrons adds to the effective volume. The analogy is a steel boat floating on less dense water since it volume is more than just the solid steel.
Relative to Sun I, the floating shell got a little too thick. As the core starved for fuel, due to diffusion restriction, it begins to cool. This cools the shell, which means more electrons will deionize, making the shell thicker and thicker as electron deionize onto more and more atoms. At that point, Sun I looks like it is almost entirely covered in sun spots. Gravity begins to takes over and collapses the shell, super heating the core but without fuel. We have this super hot building smoldering without air, with the outside looking calm. All we need to do is open a window and boom. There is a massive fusion hammer. The link below discusses matter ejection and star formation. In the case of Sun I, it got dark but then reformed into Sun II after it cleaned out the pipes. The pipes were full of planets, moons and asteroid stuff.
Explosive ejection of matter associated with star formation in the Orion nebula
