why are inner and outer planets different?
152211
The four inner planets have slower orbits, slower spin, no rings, and they are made of rock and metal. The four outer planets have faster orbits and spins, a composition of gases and liquids, numerous moons, and rings. The outer planets are made of hydrogen and helium, so they are called gas giants.
344
The Inner and Outer Planets in Our Solar System. ... The inner planets are closer to the Sun and are smaller and rockier. The outer planets are further away, larger and made up mostly of gas. The inner planets (in order of distance from the sun, closest to furthest) are Mercury, Venus, Earth and Mars.
737876
The outer planets (in the background) Jupiter, Saturn, Uranus and Neptune, compared to the inner planets Earth, Venus, Mars and Mercury (in the foreground). Orrery showing the motions of the outer four planets.
505096
How do the inner planets differ from the outer planets? ... Inner planets are smaller than the outer planets; gas giants have more gravity; Farther apart, inner planets have a solid surface, Inner planets are hotter, inner planets have a shorter period of revolution. Distance from the sun causes these differences.
671468
The four inner planets, or terrestrial planets, have solid, rocky surfaces. Mercury is the smallest planet and the closest to the Sun. It has an extremely thin atmosphere, with surface temperatures ranging from very hot to very cold.
1167065
The innermost planets are rocky and consist of Mercury, Venus, Earth, and Mars. The much larger outer planets are the giant gas planets and consist of Jupiter, Saturn, Uranus and Neptune. Most of the planets have moons, and most of the moons are tiny compaired tot he planet they are in orbit around.
113945
Orbiting the Sun are eight planets. The four planets closest to the Sun are known as the Inner Planets, or the Terrestrial Planets. ... Separating the Inner Planets from the Outer Planets is the Asteroid Belt, a region of thousands of asteroids in orbit of the Sun between Mars and Jupiter.
233766
Summary. The four inner planets have slower orbits, slower spin, no rings, and they are made of rock and metal. The four outer planets have faster orbits and spins, a composition of gases and liquids, numerous moons, and rings. The outer planets are made of hydrogen and helium, so they are called gas giants.
164137
The Inner have small amounts of moons, while the Outer have many moons. Another difference is that Outer planets have rings, and Inner planets do not. The Inner planets orbit the Sun quickly, while the Outer orbit slowly. ... The Outer planets are very large compared to the Inner planets and they spin quickly.
153584
The only difference between a planet and a dwarf planet is the area surrounding each celestial body. A dwarf planet has not cleared the area around its orbit, while a planet has. Since the new definition, three objects in our solar system have been classified as dwarf planets: Pluto, Ceres and Eris.
1237018
The four inner planets, or terrestrial planets, have solid, rocky surfaces. Earth, the third planet from the Sun, is the only planet with large amounts of liquid water, and the only planet known to support life. Earth has a large round moon. Mercury is the smallest planet and is the closest to the Sun.
1330234
The outer four planets (Jupiter, Saturn, Uranus, and Neptune) were able to keep their original atmospheres. They have very thick atmospheres with proportionally small solid cores while the the inner four planets have thin atmospheres with proportionally large solid parts.
551254
Between the inner and outer planets lies an area filled with millions of asteroids — small rocky, icy, and metallic bodies left over from the formation of the Solar System. ... Astronomers theorize that Jupiter's gravity influenced this region so much that no large planet could take shape.
156372
The four planets closest to the sun—Mercury, Venus, Earth and Mars—are the inner planets, also called the terrestrial planets because they are similar to Earth. ... All of the inner planets are solid, dense, rocky planets. The inner planets either do not have moons or have just one (Earth) or two (Mars).
1463530
So the similarity of the planets and the dwarf planets are they are both mostly round because they have sufficient gravity to flatten their own surfaces into a sphere. The differences are that planets are big enough to clear the whole region of space where they orbit the sun whereas dwarf planets do not.
13488
In our Solar System, astronomers often divide the planets into two groups — the inner planets and the outer planets. The inner planets are closer to the Sun and are smaller and rockier. The outer planets are further away, larger and made up mostly of gas.
896199
1) The “inner planets” (Mercury, Venus, Earth, Mars) don't have rings and all of the “outer planets” (Jupiter, Saturn, Uranus, and Neptune) do. 2) The outer planets are much more massive than the inner planets. ... When they are in the gravity well of an outer planet, like Saturn, they start to orbit the planet.