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.Know More
The inner planets are those that exist between the sun and the asteroid belt. They are:
The outer planets are those that are between the asteroid belt and the end of the solar system. These are:
The outer planets are known as Jovian or gas giants. They are much larger in size than the inner planets and are primarily composed of gases that surround a liquid metal core.
The inner planets are all smaller and denser than the outer planets. They are mostly solid and composed of rock rather than gas.
The reason for the difference in the size, density, and composition of the planets is that the gravity of the sun tends to attract heavier, solid elements, such as heavy metals, while lighter gases, such as hydrogen, helium, nitrogen, and oxygen, are not pulled as strongly inward.
The elements that exist in all of the planets are iron and nickel. Mercury, the planet closest to the sun, is almost entirely made of these two elements, while the outer planets only have trace amounts located in their core.Learn more in Planets
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, Mercury, Venus, Earth and Mars, are made up of silicate rock and heavy metals such as iron and nickel, whereas the outer planets, Jupiter, Saturn, Uranus and Neptune, are made up mostly of gases, according to Universe Today. The outer planets are subdivided into gas giants, comprised mostly of hydrogen and helium, and ice giants, comprised mostly of methane, ammonia and water.Full Answer >
The outer planets Jupiter, Saturn, Uranus and Neptune all have shorter days than Earth. Among the terrestrial planets, Mars has a slightly longer day than Earth at 24 hours 37 minutes. Mercury's day lasts 59 Earth days, while a day on Venus lasts 243 Earth days.Full Answer >
According to Universe Today, the four outer planets of the solar system are all gas giants. This means they lack a conventional surface, and are made up of dense gases around a possible rocky or metallic core. These planets are called Jovian planets to distinguish them from the four rocky terrestrial planets closer to the sun.Full Answer >