ζ Aquarii

Antique illustration showing how Saturn would float in water if there were a ocean big enough to hold it.

Saturn, the sixth planet from the Sun, has beautiful rings omposed of ice particles. It is the second largest planet in the Solar System, yet it is the least dense (water has a density of 1.0 grams per cm cubed, while Saturn has a density of 0.69 grams per cm cubed), which means it would float in water if there were a bathtub large enough to hold it.

Saturn is mainly composed of hydrogen and helium and does not have a solid surface. It has 25 satellites that measure at least 10km in diameter - the largest, Titan, is the only moon in the Solar System with a substantial atmosphere.

~ Medallion.

Place of origin: Hamadan Province, Western Iran

Period: Achaemenid

Date: 550-330 B.C.