Then you need to read the passage again. When was the sun created? It certainly wasn't before days were mentioned. Perhaps our revolution around the sun was based on a day, rather than the other way around?
I'm certainly not saying this is the case, but it cannot be disproven, either. I just find it interesting that the sun wasn't created until the fourth day.
My point still stands, though.
Just as Jesus didn’t leave any ambiguity about who He was, so God didn’t leave any in the Creation days. You have to make a choice - believe man or believe scripture. Due to the order given in Genesis 1, you can’t warp scripture to “fit” man’s understanding or assumptions of creation.
It was a supernatural event, as we’ve determined here by the “ex nihilo” factor. So, yes, the sun, moon, and stars were created later than “light” existed.