The scale model of the Solar System is spread out along 6.4 miles, a
little over 10 km, of the old East Coast main-line railway.
The scale of the model is 575,872,239 to 1. So every 100 metres along the track corresponds to more than 57 million kilometres in space.
The construction of this track in 1985-1987 was the first venture for Sustrans, who have gone on to create the National Cycle Network with the help of a £43.5 million grant from the Millennium Commission.