The Dances Planet in the Solar System

The Dances Planet apparently is not Mercury which is the smallest and rockiest one that is mostly made out of metal. It's also not Jupiter which is the biggest planet and most massive planet in our solar system. Daniel: The answer was the planet we loved along the way. But not by much, right? Like the Earth is like five and a half grams per cubic centimeter and Mercury is like 5.43, which is pretty close.