Fictional Universe

 
A fictional universe is a universe that has been created from the imagination. It may be constructed purely out of fantasy or out of science but is likely to combine both fantasy and science elements.

A fictional unvierse will have fictional worlds and possibly other fictional characteristics such as meteors, suns, moons and space junk though it is not neccessary for any of these elements to be based on real science or for a fictional universe to even contain these characteristics.