There was limitations in Copernicus work, and the work of those before him, many who yes, got their work turned on its head. (those who thought the sun revolved around the earth, etc.) But if nothing's been falsified since the very primitive days of Copernicus and Galileo, 500+years, then it's safe to say that astronomy is too vague to be falsifiable.
Oh, it's worse than that. In thousands of years, no-one's falsified the claim that the Sun exists. Therefore this claim is "too vague to be falsifiable", and so is unscientific.
Either that or you have no idea what you're talking about. Yeah, that could be it.
Let me go through it in another way then, which sums up my entire position. It does not matter what we understand about physics or any other form of science, it is all completely disconnectable from the supernatural way God created all of reality. If science finds anything that it claims has the ability to falsify a supernatural act, then science is thinking higher of itself than it ought to think, and is no longer a disinterested pursuit of knowledge.
But manifestly science can falsify certain claims about supernatural acts. If, for example, someone tells us that God has destroyed Las Vegas with fire as punishment for its wicked ways, then that would be a supernatural act, and yet we can determine that it did not take place.