A collaboration with Christopher Lansell, this is a sculptural model of our solar system. Created at a scale of 1:1 billion, it wraps 5.9 kilometres around Port Philip Bay in Melbourne, Australia. At this scale, one millimetre represents one thousand kilometres. Therefore the Earth has a diameter of 12.8 millimetres, situated 150 metres from the sun – which is a bronze sphere 1390 millimetres across.
The smaller planets (Pluto is 2.4mm across) are machined from solid marine grade stainless steel, while the larger planets and Sun are cast from silicon bronze. The planets are all mounted on bluestone plinths, with stainless steel information plaques attached.
The Sun is located at St. Kilda Marina, while Pluto is in Port Melbourne. To reach Alpha Centauri, the closest star to the sun, you would have to travel right around the world once, through Melbourne again and on to central NSW.

http://www.melbournesolarsystem.com.au/