I have only a rudimentary knowledge myself: but I know how the sun governs earth, and what a “star” it is. I also have some idea of how our planet Earth and humankind began.
It took all of that time for various stages of the development of crustaceans that lived in the molten lava on the ocean floors which was during the first recorded age. Think of a clock-face, and start at 1pm. It is named The Cambrian period, and its oceans contained little worms and crustaceans that lived on their floors. It was followed between 2 and 4pm by the Silburian period which enabled armoured creatures like small lobsters to develop along with fish which now had backbones.