Pluto, the former ninth planet of the solar system has been translated into the assembly of the International Astronomical Union, 2006th the category of so-called. dwarf planet. Research proposals and Australian National University (ANU) on the categorization of bodies belonging to the solar system move in the direction that the status of dwarf planet get all objects with a diameter greater than 200 km (previously 400 km), which would automatically contributed to a group of dwarf planets suddenly "grow" to more fifty objects.
Planet dwarfs in comparison with the Earth
Astronomers know that the agreement of the body in the solar system is divided into planets, dwarf planets and small bodies that are all other objects (comets, asteroids ..).
The new division, or better yet, a new categorization of this time is based on solid physical laws and properties of the body. It is believed that the objects with a diameter greater than 200 km is sufficiently massive and as a result of gravity means that it will be roughly spherical, kuglolikog forms. Dr. Charley Lineweaver and Dr Marc Norman, both from the ANU, suggests that it is precisely the foundation of the new classification. His views are based on data on the properties of these objects. For the ice body and lower-density 200 km is the limit when you assume a spherical shape while the body of higher density the boundary moves to the three hundred miles. Of course, that everything would be easy here and the nature of the care of the exceptions.
Adopt the proposal dwarfs the number of planets will rise from the current ten to over fifty. On the other hand, in our planetary system, there are hundreds and hundreds of thousands of small bodies. Some astronomers monitored with special attention given to pass very close to the ground and pose a potential threat to our civilization.
Marino Tumpić
