Sounds like a scale of 1:1,000,000,000 so the Earth is 150m from the Sun, Mars is 75m further, and Pluto somewhere around 6km. That's the same (mind boggling) s

Sounds like a scale of 1:1,000,000,000 so the Earth is 150m from the Sun, Mars is 75m further, and Pluto somewhere around 6km. That's the same (mind boggling) scale as our local one - and to complete the picture you can put a toothpick 23.585km from the sun and move it every day 147cm further from the sun. A 20nm fleck on the tip of the toothpick is then Voyager 1 represented on the same scale.