Planets with Rings:

* Saturn: The most famous ring system, composed primarily of ice (water ice, with traces of ammonia and methane) and rock in varying sizes, from dust particles to boulder-sized objects. The rings are incredibly thin, but spread out over a vast distance, making them easily visible.

* Jupiter: Jupiter has a much fainter ring system, composed of dust particles likely originating from its moons. These rings are difficult to observe from Earth.

* Uranus: Uranus has a system of thin, dark rings composed of rock and dust. These rings are made up of many narrow, separated bands.

* Neptune: Neptune also has a faint ring system, composed mainly of dust particles. It is even fainter than Jupiter's rings.

Planets Without Rings:

* Mercury: No rings

* Venus: No rings

* Earth: No rings

* Mars: No rings

Important Note:

While Saturn is the most famous for its rings, it's important to remember that all four gas giants (Jupiter, Saturn, Uranus, and Neptune) have ring systems. However, the composition and visibility of these rings vary significantly.

Let me know if you'd like more detail about a specific ring system!