(Leap July BingXu, day), August 24, 2006, Pluto is no longer classified as the solar system planets. In 2006, August 24, 2010, the 26th session of the International Astronomical Union General Assembly held in Prague, the Czech capital, passed a resolution to no longer be the controversial status of Pluto as the solar system planets, so the number of planets in our solar system from the traditional 9 was reduced to eight. In accordance with the the planets new definition adopted by the vote of the General Assembly, the solar system planets, including Mercury, Venus, Earth, Mars, Jupiter, Saturn, (history today www.lssdjt.com) Uranus and Neptune, Pluto was classified as a dwarf planet. Planets and dwarf planets are two different categories of celestial bodies.

2,500 astronomers from 75 countries took part in the International Astronomical Union General Assembly. Prior to this, the reaffirmation of Pluto's planetary status by astronomers proposed, and its largest moon Charon and join the other two celestial planets ranks. This proposal has sparked fierce debate astronomers, but ultimately did not receive widespread support. Currently, the asteroids Ceres and recently discovered number "2003 UB313", nickname "Xena" objects were classified as a "dwarf planet" did not happen, "Charon" status changes.
"2003 UB313" discoverer, Michael Brown (Michael Brown) welcomed the resolution of the International Astronomical Union, he has always maintained that Pluto and similar celestial planet eligible. He said: "UB313 is the largest dwarf planet, which is very cool. (L $ j��.c��) "