By Kay Trillos | Updated March 24, 2022
Re‑creating the solar system in modeling clay can be a fun and educational project, but achieving realistic scale and detail is challenging. By using a small sun as a reference point, you can approximate planetary sizes and relative distances while adding informative labels for each planet.
Begin with an 8‑inch diameter plastic foam ball. Cover it with bright yellow clay to represent the sun’s radiance. This will serve as the reference for all other dimensions.
Roll a small gray clay ball. In true scale, Mercury would be only 0.03 inches across and about 27 feet from the sun, so instead focus on its characteristic gray surface and close orbit.
Combine yellow and white clay to mimic Venus’s thick sulfuric‑acid clouds. Venus is roughly three times the size of Mercury and orbits just beyond it.
Use blue and green clay to form Earth’s oceans and continents. Add white spots for cloud cover. Earth’s size is close to Venus’s and its orbit is slightly farther out.
Shape Mars with red and orange clay. It is a little more than half the diameter of Earth and sits just beyond Earth in the solar system.
Create Jupiter with alternating orange and white bands to illustrate its cloud stripes. Jupiter’s diameter exceeds Earth’s by more than tenfold, and it orbits beyond Mars.
Use pale yellow clay for Saturn. Roll a thin ring from the same clay, cut a circular shape with a central hole, and attach it to the planet using toothpicks or a small dowel. Saturn’s rings are iconic, and the planet orbits near Jupiter.
Make Uranus with light blue clay. It is about 3½ times Earth’s diameter and lies farther from the sun than Saturn, marking the beginning of the outer planets.
Construct Neptune with the same light blue clay. Its size matches Uranus, and it resides just beyond Uranus in the distant reaches of the solar system.
Paint a foam board black to represent space. Attach each planet to the board with a wooden dowel or toothpick inserted into the base of the clay sphere, securing with hot glue. Space the planets to reflect relative orbital distances as accurately as your scale allows.
