But investigate on your own: If the sun is predominately iron (as Manuel asserts), what does the iron fission or fuse into to produce the sun's energy? Or is there some other process going on to produce energy? What produces a supernova and how does its size affect its fate? If the sun really is predominately iron, by weight or volume, would its size and mass be different than if it were mostly hydrogen and helium? In broad terms, how would the orbit of the planets differ from one case when compared to the other?
The answer to these questions are easily found and the answers would demonstrate Manuel's theory is based upon a false premise.
But investigate it on your ownOne of us should.