Defination of planet

Basic concept of planet .

PLANETS  : in the year 2006 (IAU) The International Astronomical union redifined of "planet".The present definition States that in the Solar system, A planet is a Celestial Body .These are opaque bodies which continuously revolve around and are lighte0d by the Sun. A planet is in orbit around the sun.Has sufficient mass so that it assumes a hydrostatic equilibrium shape.A non-satellite body full-filling the first two of these criteria is classified as a dwarf planet, whilst a non-satellite body full-filling only the first criterion is termed a small solar system body.The solar system consists of the Sun, the eight planet and their satellites or Moons and thousand of other smaller heavenly bodies such as asteroids, comets and meteors.According to the definition,there are currently eight planets and five dwarf planets know in the solar system.The five dwarf planets are pluto,ceres,eris,makemake and haumea. There are currently eight plnets and five drawf planets know in the solar system.The five drawf planets are pluto, ceres,eris, makemake and haumea.                                                                                                                                                                                                                              Planets are divided into two groups-large,low-density gas gaints and smaller,rocky terrestrials. under IAU definitions,there are eight planets in solar Mercury,venus,earth,mars,jupiter,saturanus,neptune ,

PLANETS ACCORDING TO SIZE : Jupiter,saturn,uranus,neptune,earth,venus,mars and mercury.