You're mixing things up! Charon doesn't orbit Earth. It orbits Pluto, and they actually form a binary system.

Here's why:

* Gravity: Pluto and Charon are close in size and mass, meaning their gravitational pull on each other is relatively equal. This is different from Earth and the Moon, where Earth's mass is significantly greater.

* Center of Mass: Because their masses are comparable, the center of mass of the Pluto-Charon system lies in space between them, rather than inside either body. This is a key characteristic of a binary system.

Think of it like two people on a seesaw. If they weigh the same, they'll balance in the middle. If one person is heavier, the seesaw tilts towards them. In the Pluto-Charon system, they are more like two people on a seesaw, constantly orbiting around a point between them.

So, Charon orbits Pluto, just like Pluto orbits Charon. They dance together in a beautiful cosmic waltz!