The scaled size of the Sun is given by a 27.8 cm (10.9 in) diameter circular frame repeated at the top of each 6 ft (1.8 m) tall obelisk. Centered within each sun-sized frame, the proportional size of each planet is represented by a small sphere affixed in a glass window. All of the original planet locations were chosen not only for accuracy to scale but also to highlight local landmarks and public spaces within Ithaca. However, since the original installation of the Planet Walk the public library has moved to a new location, leaving Saturn no longer attached to a local landmark. Additionally, as of 2016-2017, the original planets in plexiglass at each station have been replaced by simple yellow disks with the planet simply represented by a relatively-sized hole. Some attendant moons are now represented by tiny holes in the disks.