The scale of this model is 1:4,595,700,000 (ie 1mm = 4,595.7km). The Sun is represented by a 303mm diameter dome and each planet by a scale engraving on a flat disc. On this scale, the nearest star is 8,844km away, near Los Angeles USA! And if you were to cross the Milky Way, our local galaxy, you would have to stay on board the jet for twenty four years.