I feel like it bears adding onto that other ask about the Green Sun that that tumour could've *only* created the Sun when both universes were destroyed. In a way, they were both contained in essence within the bomb, and as they were destroyed in reality, their masses exploded from the bomb. This was foreshadowed when we earlier learned that the Sun was "the mass of two universes". It's literally made of the destroyed universes, which is how the hotel got inside of it, at the eye of the hurricane