The Solar System consists of the Sun and the set of astronomical objects affection by its gravity, those that would be the eight planets, its 162 moons, three dwarfed planets and its four moons, plus a countless number of small bodies like meteorites, I commit, asteroids and interplanetary dust.
In sequence from the Sun towards outside, which we found is the following thing: “the terrestrial” planets or “interiors”, that are Mercury, Venus, the Earth and Mars, an asteroid belt (within which the greatest object is called Ceres, considered a dwarfed planet), four giant gaseous planets (Jupiter, Saturn, Urano and Neptune), and an outer belt of frozen bodies call belt of Kuiper (Pluto is the greatest object in this zone, and as we mentioned it is a dwarfed planet). Beyond the belt of Kuiper we found another dwarfed planet, Eris, in a called zone the “dispersed disc”, that projects towards outside with a unknown extension. Six of eight planets own natural satellites, and past the asteroid belt the planets you own a “characteristic ring”, formed by small particles.
Until the 2006, Pluto was considered like the ninth planet of the Solar System, but Unión Astronómica Internacional (IAU) postulated a new definition for the term planet, and according to this Pluto exposition it would come to be a “dwarfed planet”.
It is common to see represented in diagrams the orbits of planets like equidistant, but in the reality as we moved away of the sun the distance between orbits is greater, approximately the double. The distances within the Solar System are measured in UA or Astronomical Units; 1 UA is the distance average between the Sun and the Earth, which is equivalent to approximately to 149.598.000 km. In order to have a Pluto idea one is 39 UA of the sun. Difficult to believe. Now to have an idea as large as the planets, are interesting to know that Jupiter is greatest, with an equatorial diameter of 11,2 times the one of the Earth, and smallest it is Mercury, with one of 0,382 times the one of our planet (the equatorial diameter of the Earth is of 12,756, 28 km and its surface is of 510.065.284, 702 km ²).
Although popularly of speech of Solar System to refer also planetarium systems to us, in fact technically the term only applies to the system corresponding to the one of the Earth in which we lived, since the solar term is derived from the Sun, an original name in Latin. In order to refer us to other systems the correct thing it is to make referring it us to his corresponding star, like for example “the system Centauri Alpha”.
