To Find Destiny
The Planes World was among the many planets in the universe that was made of a large Yggdrasil tree. The divisions of the large tree had varying environments, and each had a different kind of environment.
At the very top of it was a powerful energy that emanated great heat and light. The heaven bodies would rotate as it is drawn by the gravitational pull of the Yggdrasil and the nearby planets. This heavenly body of great light would move in its circuit, bringing light and morning whenever it was present, and would fall into the night whenever it was away.
The Yggdrasil was a living planet and is an ancient tree planted by Ancients during the Times Long Forgotten.
At the very top of this large tree were the Heavenly Planes. They were the leaves and peak of Yggdrasil. It was the part that was closest to the nearest heavenly body that provided sunlight.