The planets are made out of gas.
Barney the Dinosouar
The outer planets are also called Jovian planets or gas giants. These planets include Jupiter, Saturn, Uranus, and Neptune. These outer planets are gaseous with no solid surfaces and only liquid cores.
The four outer, or gas planets are Jupiter, Saturn, Uranus and Neptune. They are mainly made up of Hydrogen and Helium gas. They are also much larger than the Earth or the other three inner planets, so are referred to as gas giants.
The outer planets are Gas Giants, also known as Jovian planets.
The Ice Giants.
the first four planets, closet to the sun, are called the "rock planets" these are, in order from the sun outwards : mercury, venus, earth, mars after mars are the gas giants, which are not made of rock, but gas, as the name suggests.
In our solar system, Saturn is well known for its spectacular ring system, however, Jupiter, Uranus and Neptune all have faint ring systems. Collectively the four outer planets are referred to as gas giants, often the term ice giants is applied to Uranus and Neptune.
Another name for the terrestrial planets is the inner planets. There are four terrestrial planets: Mercury, Venus, Earth and Mars.
Another name for gaseous planets is Jovian planet meaning Jupiter like.
They are known as terrestrial planets. They are Mercury, Venus, Earth and Mars.
These four planets are known as the 'Gas Giant' planets.
The four Jovian planets are Jupiter, Saturn, Uranus, and Neptune.They are all giant gas planets, meaning that they are not only outstandingly giant planets, but also that they are not mainly composed of solid matters such as rock, but of gas!The Romans named the planet Jove/Jupiter, the name of one of their mythological gods. The word Jovian is the adjective form of Jove.And the planet Jove/Jupiter is by far the biggest (or 'god'!) of all the Jovian planets!For more information, see Related links below.