Beyond Mars lie the four outer planets — Jupiter, Saturn, Uranus, and Neptune — all much larger than the inner planets and made mostly of gas and ice rather than rock.
Jupiter is the largest planet in the Solar System — more massive than all the other planets combined. Its Great Red Spot is a storm larger than Earth that has been raging for at least 150 years.
Saturn is famous for its spectacular rings, made of countless chunks of ice and rock, some as small as dust grains and others as large as mountains.
Uranus is unusual because it rotates on its side, likely due to a massive collision billions of years ago. It has a pale blue-green color from methane in its atmosphere.
Neptune, the most distant planet, has the fastest winds in the Solar System, reaching speeds of over 2,000 km/h. It was the first planet discovered through mathematical prediction rather than direct observation.