The Planet
The  planet is a celestial body orbiting a star in outer space, which is  large enough to form its shape by the force of its attractiveness, but  it is not large enough to produce a nuclear fusion

Planetary types

A gas giant
Is  a large-sized planet, basically not composed of rocks or other solids,  and there are four planets of the gaseous giants in the solar system,  namely: Jupiter, Saturn, Uranus and Neptune, and for the planet Neptune  has been classified and sub-planets It  is composed of ice, rocks, ammonia, methane gas and water gases, unlike  other traditional gaseous planets such as Jupiter and Saturn, so there  is no solid surface on each of the four planets, but unlike Uranus and  Neptune, Hydrogen gas and helium gas 

Ice Giant
Is  a giant planet, consisting mostly of less volatile matter of helium and  hydrogen, and these planets are composed of ice elements in the  foundation, and was in fact a snow during the formation of giant  glaciers, and is believed that this type of planets lacks the presence  of hydrogen metal in the cave Unlike the giant gas planets. Earth planets
It  is the only planet where humans can live, because it provides all the  necessary oxygen gas, drinking water, food and the appropriate  environmental conditions. The land is divided into land and water. Water  accounts for about 75% of its area and consists of seven continents .

Dwarf planets
These  planets can be defined as celestial bodies orbiting the Sun or the main  star of the group in which they are present. It is not a planet; it is  not controlling the surrounding area from the rest of the asteroids, nor  is it a satellite of another planet. Its spherical shape has enough mass to enable it to resist the  attraction power of other solid celestial objects, then maintain the  hydro static balance.
Other planets
Carbolic planet
It is a kind of planet whose disk is rich in carbon and poor in  oxygen, but not like planets such as Earth, Mars and Venus, which are  made up mainly of oxygen and silicon.
Planet rogue
Is  a kind of planet that exists between the stars, also called planets or  free floating planets, which is in a problem similar to the rest of the  planets, but it is characterized that either has been expelled from the  system, or was not originally within the attractiveness of any of the  stars, It is believed that the planets that have a large mass are those that move away from their group 

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