A practical display of the scale of our Solar System!
You know how you can never find a picture of all the planets at the right scales and distances? Or even find a picture with both the Earth and Moon in it? Well, this will show you why.

There are three sections:

1. The spacing of the Sun and all the planets at a scale of 1:1,000,000,000
   
2. The sizes of the Sun, planets, and their major moons, at a scale of 1:1,000,000
3. The sizes and distances of the Earth and Moon, including the layers of the Earth, and the altitudes of the ISS and Geosynchronous orbit, at a scale of 1:100,000

The screenshots will show you most of it, but flying around it will give you a feel for the scale like never before