Until recently, astronomers believed that such a concept as a planet, refers exclusively to the solar system. All that is beyond its borders is uncharted cosmic bodies, most often stars of a very large scale. But, as it turned out, the planets, like peas, are scattered throughout the universe. They are different in their geological and chemical composition, may or may not have an atmosphere, and it all depends on the interaction with the nearest star. The location of the planets in our solar system is unique. It is this factor that is fundamental for the conditions that have formed on each individual space object.
Our space house and its features
In the center of the solar system is the star of the same name, which is included in the category of yellow dwarfs. Its magnetic field is enough to hold around its axis nine planets of various sizes. Among them there are dwarf stony cosmic bodies, gas immense giants that reach almost the parameters of the star itself, and objects of the “middle” class, to which the Earth belongs. The location of the planets of the solar system does not occur in ascending or descending order. It can be said that with respect to the parameters of each individual astronomical body, their arrangement is chaotic, that is, a large alternates with a small one.
To consider the location of the planets in our system, it is necessary to take the Sun as a reference point. This star is located in the center of the SS, and it is its magnetic fields that correct the orbits and motions of all the surrounding cosmic bodies. Nine planets rotate around the Sun, as well as the ring of asteroids, which is located between Mars and Jupiter, and the Kuiper belt, located outside of Pluto. In these intervals, separate dwarf planets are also distinguished, which are sometimes attributed to the basic units of the system. Other astronomers believe that all these objects are nothing more than large asteroids on which life can not be born under any circumstances. They attribute to this category Pluto itself, leaving only 8 planetary units in our system.
The order of the planets
So, we list all the planets, starting with the closest to the Sun. In the first place are Mercury, Venus, then - Earth and Mars. After the Red Planet passes the ring of asteroids, followed by a parade of giants consisting of gases. These are Jupiter, Saturn, Uranus and Neptune. The list completes the dwarf and icy Pluto, with its equally cold and black satellite Charon. As we already said above, several more dwarf space units are distinguished in the system. The location of the dwarf planets of this category coincides with the Kuiper belts and asteroids. Ceres is in the asteroid ring. Makemake, Haumea and Eris are in the Kuiper belt.
Earth Group Planets
This category includes space bodies, which in their composition and parameters have a lot in common with our home planet. Their bowels are also filled with metals and stone, around the surface there is either a full atmosphere, or a smoke that resembles it. The location of the terrestrial planets is easy to remember, because these are the first four objects that are directly next to the Sun - Mercury, Venus, Earth and Mars. Characteristic features are small size, as well as a long period of growth around its axis. Also, of all the terrestrial planets, only Earth and Mars themselves have satellites.
Giants consisting of gases and hot metals
The location of the planets of the Solar System, which are called the gas giants, is the most distant from the main body. They are located behind the asteroid ring and stretch almost to the Kuiper belt. In total there are four giants - Jupiter, Saturn, Uranus and Neptune. Each of these planets consists of hydrogen and helium, and in the region of the nucleus there are metals heated to a liquid state. All four giants are characterized by an incredibly strong gravitational field. Due to this, they attract to themselves numerous satellites, which form almost entire asteroid systems around them. The gas balls of the SS rotate very quickly, because of which vortexes and hurricanes often occur on them. But, despite all these similarities, it is worth remembering that each of the giants is unique both in its composition, and in size, and in the force of gravity.
Since we have already examined in detail the location of the planets from the Sun, we know that Pluto is the furthest, and its orbit is the most gigantic in the SS. He is the most important representative of dwarfs, and only he from this group is the most studied. Dwarfs are called those cosmic bodies that are too small for the planets, but also large for asteroids. Their structure may be comparable to Mars or Earth, or it may be just rocky, like any asteroid. Above we listed the most prominent representatives of this group - these are Ceres, Eris, Makemake, Haumea. In fact, dwarfs are found not only in two SS asteroid belts. Often they are called satellites of gas giants who are attracted to them due to the enormous gravitational force.