They aren't. 4 are rocky and 4 others are the gas giants.
there are 9 planets
All
Not really, they are made of rock.
Yes. Like most terrestrial planets it has a core made mostly of iron.
Inner planets are smaller and made of rock and metal, while outer planets are larger and predominantly made of gas and ice. Inner planets have few or no moons, while outer planets have numerous moons. Inner planets have solid surfaces, while outer planets do not have solid surfaces, instead having thick atmospheres.
there are 9 planets
sedimentary rock
Rock and other solids. (Iron, Metal, Ice, ect.)
Most planets are made of some kind of terrain and atmosphere. Most planets in our solar system have a terrain that consists of some kind of rock, ice, sand, or dirt that forms the planet and an atmosphere that consists of a gas.
Planets are made up of many different particles. Such as iron, rock, metal, lighter rock elements.
The planets Mercury, Venus, Earth, and Mars are made of rock.
The four inner planets are all made of rock or are rock based but the four outer planets are all made of gas or gas based.
All
No, some are made out of gas.
Not really, they are made of rock.
juptier
Yes. Like most terrestrial planets it has a core made mostly of iron.