Question

who was the first argue that the sun, not the earth was the center of the universe?

Answer 1

nicholas copernicus

Answer 2

Yes, it was Copernicus.

Answer 3

It was eventually proved by Galileo, if I remember correctly.

Answer 4

If you don't mind, technically your question is wrong.no one has ever found out the borders of the universe ,hence, we do not know what exactly lies in its center.and practically your question's answer is Nicholas Copernicus.
No offence expected i was just correcting your question.