According to the General Theory of Stellar Metamorphosis, planet formation is stellar evolution. This means all properties of planets are a direct result of the conditions present when they were younger stars and their orbits around other hosts. The Earth’s inner iron core is less dense than its outer core due to being bombarded with iron/nickel from outer space, as it was composed of liquid metallic hydrogen, which formed a bond with the iron and nickel, forming iron and nickel hydride. Drawing from this hypothesis, the zone with which the inner iron core’s density changes (becomes denser in the outer iron core), is a clue to when the majority of the hydrogen could no longer form bonds with the iron/nickel. This in turn can be used to explain how, why and when the pressures changed during iron core formation, due to both evaporation of the hydrogen due to mass loss of the star and chemical factors. That in turn can tell us how thick the atmosphere was during this transitional stage, and give far more information than is what made possible with the iron-catastrophe hypothesis.