Ghost
Inkling
My first idea was of a realm, something that wasn't a typical planet and actually had a completely random rising of the sun and moon. The sun and moon would actually be two warring gods; whoever had the upper hand at the time would have their object (the sun or moon) dominate the sky.
I think your idea is great. If you love the idea, it's worth pursuing. I don't see how plausibility matters. Things only have to be plausible within the story. When you set scenes and show how life on this world shapes your characters, it becomes believable. The way you weave it into the narrative determines whether the reader will accept it or not. A plausible idea can sound stupid or an outrageous one can make sense. It depends on how you tell the story.
Yeah, honestly, I was never really looking for a scientific reason for it.
LOL