In the universe, an asteroid belt physically separates and distinguishes the inner planets from the outer planets. This asteroid belt appears just after Mars and right before Jupiter. Mars bears the distinction of farthest inner planet from the sun while Jupiter takes recognition as the closest outer planet.
In the solar system, the inner planets include Mercury, Venus, Earth and Mars. These planets, in that order, span the distance from closest to furthest from the sun. The four inner planets are classified as terrestrial planets, which means their surfaces were formed from solid substances. Although classified as terrestrial, Earth is the only inner planet capable of supporting vast amounts of life.
The other planets contain some hospitable features, such as water and ice, but lack the climactic conditions suitable for growth. The cores and surfaces of the inner planets were formed primarily from metals and elements. Heavy metals of iron and nickel form the many layers of most inner planets. In contrast to the inner planets, the outer planets contain warmer atmospheres as they were formed from gases and liquids. These planets feature rings and many moons. Like the inner planets, outer planets vary in size. Jupiter, also the closest to the sun, is the largest.Learn More
The inner and outer planets all follow an elliptical orbit, share the same orbital plane, are spherical and contain some of the same elements. Besides those attributes, each planet is very different.Full Answer >
The names of the outer planets are Jupiter, Saturn, Uranus and Neptune. Jupiter is the largest planet in the Solar System. All four planets are considered gas giants, and Uranus and Neptune are considered by some astronomers to be ice giants as well.Full Answer >
The main difference between inner and outer planets is that outer planets are larger and are mainly made of gas. The inner planets are Venus, Mercury, Mars and Earth, while the outer planets are considered to be Saturn, Uranus, Neptune and Jupiter.Full Answer >
The inner planets of the solar system are all relatively close to the sun. They are also all relatively similar to each other in size, mass, density and other physical properties. Unlike the outer planets, the inner planets are small, dense and warm.Full Answer >