I have recently heard of something rather unusual called the Black sun I have tried to read up on the subject but haven't been able to find a lot of information that really describes it in depth or really explain what it is supposed to be.
The things I have found said it was supposedly a big ball of something called the prima materia, or a sun inside a hollow earth giving light to the secert inner world of the earth, or various orther things that never really made a lot of sense.
Does anyone have any information on this and can explain this object in greater detail?