* Jupiter

* Saturn

* Uranus

* Neptune

These planets are called "outer" because they are located further from the Sun than the inner planets (Mercury, Venus, Earth, and Mars).

Here are some key characteristics that make them different from the inner planets:

* Larger and more massive: Outer planets are much bigger and heavier than the inner planets.

* Gas giants: Jupiter and Saturn are primarily composed of hydrogen and helium, making them gas giants. Uranus and Neptune are also mostly gas, but they have a significant amount of ice in their composition, so they are often called "ice giants."

* No solid surface: Outer planets do not have a solid surface like Earth or Mars.

* Many moons: Outer planets have numerous moons, some of which are larger than the planet Mercury.

* Rings: Saturn is famous for its prominent rings, but all the outer planets have rings, though they are much fainter and less visible.

Let me know if you'd like to learn more about any of the outer planets!