Most planets revolve around the Sun in the same plane and in the same direction.
This takes place during a supernova, and may be followed by positron emission or electron capture. As one of the planets of the solar system, the Earth also formed by the accretion of planetesimals. This high temperature caused the material forming the Earth to melt during its early stages of evolution. Dense elements such as Fe and Ni began to sink to form the core which was then surrounded by a mantle of less dense material rich in Fe, Mg and Si. Those elements combined with Si to form a less dense continental crust.