Which planets are categorized as outer planets?

The outer planets, also known as the gas giants, include Jupiter, Saturn, Uranus, and Neptune. These planets are characterized by their large sizes and gaseous compositions, as opposed to the solid surfaces seen in the inner planets, which include Mercury, Venus, Earth, and Mars, often referred to as terrestrial planets due to their rocky nature.

The correct categorization of the outer planets as gaseous planets highlights their distinct composition and environmental conditions compared to the inner planets. For instance, the outer planets have thick atmospheres primarily made up of hydrogen and helium, with complex weather systems and numerous moons, whereas the inner planets have solid surfaces and are significantly smaller in both size and mass.

Understanding the characteristics of gaseous planets is crucial because they play a significant role in our solar system, influencing the orbits and dynamics of surrounding celestial bodies. Their lack of a definitive solid surface and their extensive ring systems further emphasize their classification as gaseous or outer planets, setting them apart in planetary science.