American researchers, predstavlyayushie southwest research Institute, came to the conclusion that the satellites of Mars, Phobos and Deimos appeared once in the Red planet crashed into another space body. In the new version, it had to be not too large, but still quite impressive size.
Experts say that by far the most popular two versions of the origin of Phobos and Deimos: the first is that they appeared simultaneously with the planet, which rotates around from protoplanetary dust, and the second, in the past was a asteroids, not related to Mars and to each other in a direct relationship, however, subsequently captured by the gravity of the red planet and since then, revolving on its orbit. The theory that the moons were created as a result of collision of two large celestial bodies previously mentioned but rarely viewed as the main one. At the same time, exactly this kind of scenario is the most popular version of the origin is the only natural satellite of the Earth — the moon.
Such “double standards” due to the fact that the diameter of the moon is only four times different from earth, while Phobos and Deimos are too small even for the relatively small size of Mars. However, according to the model provided by the experts, the satellites should be exactly like this, assuming that in the past Mars was faced with a not too large object in size comparable to the dwarf planet or very big asteroid.
This is not the first study whose authors suggest that Phobos and Deimos were the result of a collision of Mars with another large celestial body. For example, in 2016, a team of scientists from Belgium, France and Japan provided the appropriate scenario in which quite “fit” Phobos and Deimos into their current orbits. Moreover, they found that such a collision would lead to the emergence of a third satellite of the red planet — the larger and more massive than his two famous “brother”, which rotates around Mars in the five million years and then fell on its surface. The specialists said that today it is gradually approaching Mars, Phobos, and in the future, he may repeat the fate of his hypothetical predecessor.