It’s easy to look back to the past, and laugh at those morons who used to think that the sun revolved around the Earth. One of the first things you learn in school is that planets revolve around the sun - not the other way around - because the sun is the real star of our solar system, in every sense of the word. And yet that’s not entirely accurate: Remember those solar system models, with the sun stuck on an immobile pillar, while all the other planets spin around it on wires? You know, every model of the solar system you’ve ever seen?
It’s wrong, and so is that diorama your stupid kid made that won second place at the science fair, losing out to a baking soda volcano. In reality, the sun is just another orbiting object, which also rotates around the true center of the solar system, the barycenter. What’s there? Nothing. Absolutely nothing.