In order to make a diagram of our solar system easy to read, one with to-scale orbits has inflated planet size. Only with a model like the one Overstreet and Alex Gorosh created can you see just ...

Starting with an Earth the size of a marble, these folks built a full-scale model of our solar system across 7 miles of Nevada desert.

Those proportions are kept honest in the scale model, in which an Earth that's only the size of a small marble calls for a solar system that's 7 miles wide.