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Class 6 Social Science - The Earth In The Solar System Online Class 6 Social science : Planets -  Planets are the celestial bodies which do not have light or heat of their own. The word planet is originated from a Greek word Planetai which means wonderers. There are total eight planets in the solar system .All the eight planets (Mercury, Venus, earth, Mars, Jupiter, Saturn, Uranus, and Neptune) moved around the sun in a fixed path called orbits. Jupiter, Saturn, and Uranus have a ring around them which is made of the belt of small debris. Mercury is the nearest planet and Neptune is farthest from the sun. Venus is considered as Earth’s twin as it is similar in shape and size of an Earth Pluto now is known as a dwarf planet instead of a planet. Earth It is the fifth largest planet and third nearest to the sun. Its shape is Geoid as it is flattened at the Poles. It gets its light and heat from the sun. It appears blue from the outer surface as 2/3rd of it is covered by