in February 1930 of the last century the American astronomer Clyde Tombaugh discovered the ninth planet.The search of the space object lasted from the beginning of the century and have been calculated theoretically, but it is not so easy, and they failed.

Planet Pluto (134340 Pluto) is located at a considerable distance from Earth.Its distance from the center of the solar system are constantly changing: from 4 to 7 billion kilometers.This is due to the small size of Pluto and the huge impact that massive objects of the whole system.As you know, now, Pluto is no longer belongs to the category of the planet: the International Astronomical Union in 2006, it was decided to remove the "title" of the planet with this celestial object.

What is Pluto



So, Pluto - a small body of the solar system, consisting of a variety of rocks, covered with ice shell.Note that Pluto is different from almost all objects in the system.
  • Firstly, it does not fall into either category of planets: it is smaller and lighter
    than any other planet.In addition, it is even less than a satellite of the planet, including the Moon.
  • Secondly, in its structure, he also can not refer to any of the categories of known terrestrial planets and giant planets.It is known that the terrestrial planets are made up of hard shell, which consists of rocks and various metals.The giant planets are in turn composed of a solid core and a large gaseous envelope.Pluto has some other structure (described above).
  • Third, the speed of rotation around the axis is too small for such a small planet.All these facts make Pluto a mysterious object located somewhere on the outskirts of our solar system.

The size of Pluto (Pluto)

From the Earth to Pluto can be seen only in a very powerful telescope.It is so small that it can not be seen with the naked eye or even amateur telescope!Its surface area is comparable to the area of ​​a country such as Russia (equatorial radius is only 1195 km).However, for the astronomical scale is insignificant size.In addition, its distance from the Sun is so great that at the farthest point of its orbit, it is seen as a kind of that distant shining star.This picture reminds frosty moonlit night when the moon shines its dim light snow surface, but did not warm her.

interesting fact that the cold on Pluto reaches 230 degrees below zero.It's so very cold that his small and rather flat atmosphere freezes and falls to the surface in the form of crystals, which with the onset of spring plutonovskoy again transformed into "air", consisting mainly of nitrogen, methane and carbon monoxide.

So, all that we know about the distant object of our system of planets, is that we have more than 80 years to get the pictures into a powerful ground and space telescopes.Never before in the history of astronautics did not reach Pluto spacecraft: so far it is in earthly measures space.However, such a meeting will take place in the near future - the American spacecraft "New Horizons" reaches this remote corner of outer space and the curtain slightly open to us the mystery of this enigmatic object on the edge of the solar system.
Author: Editorial TutKnow.ru | View: open source