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Mercury, Venus, Earth and Mars are all rock planets. The more technical term is terrestrial planets and they are composed of almost entirely of rock and metal. Each has a tiny amount of atmospheric gas and Earth has a tiny amount of liquid water.

The other four planets are the gas giant planets, Jupiter, Saturn, Uranus and Neptune. That means they do not have a solid surface that is visible and much of the mass of the planet is the gaseous material. (All must have some small inner region consisting of rocky material, even if it is a tiny fraction of the mass that has been collected from stray asteroids.)

The two gas giants closest to the Sun, Jupiter and Saturn, are the two largest in the solar system with Jupiter the largest of all. Both are composed mainly of hydrogen and helium.

The outermost gas giants are called ice giants. Being colder, Uranus and Neptune have formed with substantial quantities of water, ammonium and methane with smaller amounts of hydrogen and helium in the outer regions. The water, ammonium and methane are solid at these temperatures, so the center of these planets is primarily frozen gasses with hydrogen and helium being predominant as an atmosphere.

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Related Questions

Is mercury a gas giant or a rocky plant?

It is a rocky planet or terrestrial planet. Any planet before Mars is terrestrial and any planet after Mars is a gas giant.


Is mars terrestrial planet or gas giant?

Mars is a terrestrial planet, not a gas giant. Mars is a terrestrial planet because the majority of it is rock, not gas.


What is earth a terrestrial planet or a gas giant earth?

A terrestrial planet, Gas giant planets are made of gas....


Is a terrestrial planet Mercury or Jupiter?

It's a "terrestrial" planet, because it is rocky with an iron core, like planet Earth. "Terrestrial" means "Earthlike". Jovian planets are mainly made of gases and liquefied gases.


What is earth a terrestrial planet or a gas giant?

Earth is a terrestrial planet, like Mercury, Venus, and Mars, that is composed primarily of rock and metal. Gas giants, on the other hand, are mostly made up of hydrogen and helium, like Jupiter and Saturn.


Is Mercury a gas giant or is it rocky?

Mercury is a rocky planet, just like all the terrestrial planets: Mercury, Venus, Earth and Mars.


Is Jupiter considered to be a gas giant or terrestrial planet?

Jupiter is a gas giant planet.


Which planet is not classified as a gas giant or a terrestrial planet?

Out of all the planets in our solar system, four are considered gas giants or Jovian planets. They are Saturn, Neptune, Uranus and Jupiter. The ones that are not gas giants are Mars, Mercury, Venus, and Earth.


Is mars a gas giant or a rocky terrestrial?

mars is a terrestrial planet or an inner planet


What is the opposite to a terrestrial planet?

The opposite of terrestrial planet is gas giant


Is Jupiter a giant gas or a terrestrial planet?

Jupiter is one of the four gas giant planets, the outer planets.


Is Pluto terrestrial or a giant gas?

Pluto is classified as a dwarf planet, not a terrestrial planet or a giant gas planet. It is primarily composed of rock and ice, similar to terrestrial planets like Earth, but it lacks the characteristics of a true terrestrial planet or a gas giant.