I think the way I’d do it if I were writing a story about this world would be to just not mention the technicalities
Either it’s a medieval level fantasy world where they don’t understand how it works and it’s equivalent to how the sun works or weather works
Or it’s modern day and people generally don’t talk about the finer technicalities the same way people don’t go around casually discussing in detail what causes wind to blow or temperatures to rise and fall
Also, it’s fantasy so it could also just be it works that way because all poweful space cthulu decided that’s how it works