How many dwarf planets are there in the solar system ?
Apart from Pluto, Ceres and Eris (UB313) have additionally been categorized as dwarf planets. Until recently, Ceres was called the largest asteroid. It has a diameter of about 950 kilometres (600 miles) and is in the asteroid belt between Mars and Jupiter. Eris is the biggest of all the dwarf planets. It has a diameter of about 3,000 kilometres (1,850 miles).
