The third law links the size of a planet's orbit to the amount of time it takes ... the Earth was drawn as shown in the correctly scaled diagram it would be impossible to see any difference ...

It actually follows its own tiny elliptical orbit around what is called the center of gravity (the barycenter) of the system, the sun and the orbiting planets. This barycenter is usually not equal ...

For a time, Pluto sat on diagrams of the Solar System alongside ... it does not dominate its own orbit like the actual planets do. Pluto has not tidied up enough of its orbit of other space ...