Newton's Equations Explained the Orbit of the Planets

Newton's equations were so great that he could account not just for the interaction between the sun and, and in the planet, but also with each other. But there was one planet which was causing a re throwing a wrench in everything. Do you know which planet it was? Was it Jupiter? No, Jupiter was fine. You can look at it. It wasn't Pluto. I'm just going to cut to the chase. Tell me what it is. It was Mercury.