This is the creation of Fire Chief Robert Perry and the 4th Grade Class at the nearby Clapp Elementary School. Starting next to the entrance to Lynch Park and a little north and opposite Hudson St on Arlington Road, this is a series of carefully placed markers that show the relative distances of the planets in our solar system from our Sun. A Red Ball marks the location of the Sun. And as you walk south along Arlington Road, you encounter stone markers for each of the planets. See Below.