... The first part of the Astropark that most people see represents our own Solar System. The Sun and the nine main planets are laid out here, so that you can compare their distances and sizes. ... The Sun - the closest star to Earth, represented by a giant archway at the same scale as the planets beyond. ... They move in orbits around the Sun, also marked out in the Astropark. Moons - in orbit around nearly seven of the planets, but not represented in the Astropark. ...