Board Thread:Lore Discussion/@comment-4157880-20150508164344/@comment-9212235-20150509004604

As has been stated, yes Magnus is the "sun" but it is not like what we would think of when we think of a sun or stars. The sun is actually a hole torn through Oblivion into Aetherius made by Magnus (the being) when he fled the creation of Mundus. The stars are also holes but they were created by his followers, the Magna Ge, when they followed him out.

On a side note, the moons are the two halves of Lorkhan's dying body.