* Jupiter: The largest planet, a gas giant with a mostly hydrogen and helium atmosphere.

* Saturn: Known for its prominent ring system, also a gas giant with a hydrogen and helium atmosphere.

* Uranus: An ice giant with a methane-rich atmosphere that gives it its blue color.

* Neptune: Another ice giant, similar in composition to Uranus but with a more intense blue color.

These planets are considered "giants" because of their large size and mass compared to the terrestrial planets (Mercury, Venus, Earth, and Mars). They are primarily composed of gases and ices rather than solid rock, and they lack a solid surface.