Saturn

With its beautiful ring system, Saturn is probably the planet that captures our imaginations the most. Primarily made up of water ice, Saturn’s ring aren’t unique in the solar system, but they’re easily the most visible.

The sixth planet from the Sun, Saturn is named after Saturnus, the Roman god of agriculture. In addition to having a planet named after him, Saturn also has a day of the week, Saturday, ascribed to him.

Being around 96 percent hydrogen, Saturn is considerably less dense than our home planet, and is the only planet that could float in a large enough tub of water, if you could somehow conjure up a tub of water that large.

One of Saturn’s many moons is Titan, the only known moon in our solar system to have a thick atmosphere. It’s also the only other place we know of that has stable bodies of liquid — although given the moon’s low surface temperature of around 179 degrees Celcius (-290 degrees Fahrenheit) and the moon’s nitrogen atmosphere, Titan’s lakes and seas are probably made out of liquid methane and ethane.

Header image: Ring world waiting by NASA.