What typically characterizes the outer planets of the solar system?

The outer planets, often referred to as the gas giants or Jovian planets, are characterized primarily by their composition and structure. They are predominantly composed of gas, with thick atmospheres mostly made up of hydrogen and helium, and they lack the solid, rocky surfaces typical of the inner terrestrial planets.

Additionally, the outer planets have a larger number of moons compared to their inner counterparts, which is a reflection of their greater gravitational pull and the more complex formation conditions in the outer solar system. Their extensive systems of rings further distinguish them from the terrestrial planets.

In contrast, the inner planets are solid and rocky, tend to be closer to the Sun, and are generally smaller in size compared to the outer planets. Thus, the defining characteristics of the outer planets highlight their gaseous nature and the presence of numerous moons, making the second choice the most accurate description.