Saturn is often called the ringed planet because it has more rings than any other planet in the solar system, and they are the most visible.
the ringed planet
mercury
The Lord of the Rings, for obvious reasons. The ringed planet
The ringed planet, or gods bride in some eastern cultures.
Saturn
Saturn is called a gas giant because it has no solid surface. It is also known as an outer planet or Jovian planet.
The ringed Planet
No. lol
Jupiter
Ceres is a dwarf planet [See related question] and does not have rings.
Several planets have rings, but most of them are pretty faint. The rings of Saturn are different, they are very bright and easy to see with a telescope, and that is why Saturn is called the ringed planet.