What is the composition of the planets in the solar system?

The planets in our solar system are classified as either inner or outer planets. The inner planets are composed primarily of rock and metal, while the outer planets are made mostly of gas and ice. The four inner planets, Mercury, Venus, Earth, and Mars, are also known as the terrestrial planets. They are relatively small, have rocky surfaces, and are closer to the sun. The outer planets, Jupiter, Saturn, Uranus, and Neptune, are much larger and composed mostly of hydrogen and helium gas, with varying amounts of water, methane, and ammonia ice.

In addition to the eight planets, the solar system also contains dwarf planets, such as Pluto, and small bodies such as asteroids and comets. These objects have a wide range of compositions, from rocky to icy to metallic, and provide valuable information about the formation and evolution of our solar system.