Planet 9: a recent discovery could give us answers

In recent years, the exploration of the universe has been making great strides, just think of the discovery of new things dwarf planets, new orbital planets, i perieli, the recent ones objects found beyond the orbit of Neptune and finally, of Planet 9, or Planet X.

We all know that the Solar system it is formed by a star surrounded by eight planets, the closest to the Sun, Mercury, and the furthest away, Neptune, however although most of the planets (with the exceptions of Uranus and Neptune) were known to science in antiquity, we have made little progress since the invention of the telescope, up to recent discoveries.