Previously we accept several ways in which we looked for a classification of the known planets, and many times this had to do with various factors, ie distance to the sun, composition and size. However, these qualities do not have certain appreciable inequalities between each one of them.
Evidence the classification of planets
The classification of planets can be by various factors and qualities, let’s see what are traditionally known:
Classification of the planets by their composition
The classification of the planets according to their composition are represented in the following way:
1. Rocky Planets
The rocky planets, equally called telluric, or terrestrial, are bodies of high density, constituted essentially by rocky and metallic materials, with a well diversified internal distribution, and with a similar size respectively, between They are found Mercury, Venus, Earth, Mars, and Pluto.
In this sense, these planets at the same time, are known as inner planets. Likewise, the classification of the inner and outer planets is carried out according to their distance to the sun; The ‘ ‘ line ‘ ‘ border is the asteroid belt that is located between Mars and Jupiter.
What does rocky materialize to a rocky planet?
The main peculiarity of the rocky planets is that they are created mainly by silicates. The silicates are the most copious group of minerals, and also the highest geological category, as they are petrogénicos, ie, are the minerals that create the rocks.
In the same way, the rocky planets are determined by having mainly solid surface, unlike the gaseous ones, whose area is particularly liquid or gaseous. The earth is the only rocky planet that enjoys an active hydrosphere, in other words, it is the only planet with water on and under the surface.
2. Gaseous planets
The gaseous planets are those compounds especially by gases, in particular hydrogen and helium. In our Solar system concern this category Jupiter, Saturn, Uranus and Neptune, however, in the latter the ice is a substantial element in its structure.
The gaseous planets, depending on their mechanisms of creation, do not have to have a solid rocky nucleus, but they can reside in a continuum of slowly more thick gases which subsequently reach the properties of a fluid when it is at high Pressure.
In the case of Jupiter and Saturn, gaseous hydrogen in the molecular state gives way to a state called “metallic hydrogen” with specific belongings. The vast majority of the extrasolar planets revealed to date are gaseous planets thanks, at least in part, to the current discovery technologies separating better planets from greater mass.
Characterized by their thick atmospheres, by rapid rotational agitation, huge magnetic fields, with many satellites and ring methods; Among them are Jupiter, Saturn, Uranus, and Neptune.
Classification of the planets by the distance with the sun
It is the main way of unequalizing the planets, so you can find:
1. Inner planets
As I mentioned earlier, these are those who have a distance with the sun less than with the Earth. These planets are mercury and Venus.
2. Outer planets
They are those planets whose journey with the sun is greater than with the earth like Uranus, Mars, Saturn, Jupiter and Neptune.
Classification of the planets according to their characteristics
Another form for classification of the planets is according to their surface and the particulars that they possess giving place to:
1. Terrestrial planets or telluric
They are those that have a rocky and solid surface and their cohesion is elevated as for example Mercury, Venus, Earth and Mars.
2. Jovians Planets
They have large diameters, consisting of gases and with a low density. They create part of this kind of planets Saturn, Uranus, Jupiter, and Neptune, the giant planets.