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Number of Dwarf Planets

How many dwarf planets are there?

5.

There are 5 dwarf planets officially recognized by the International Astronomical Union (IAU). These are Pluto, Ceres, Eris, Makemake, and Haumea. In 2006 IAU approved the new classification scheme of a dwarf planet, and defined it as ‘Å“a celestial body that (a) is in orbit around the Sun, (b) has sufficient mass for its self-gravity to overcome rigid body forces so that it assumes a hydrostatic equilibrium (nearly round) shape, (c) has not cleared the neighbourhood around its orbit, and (d) is not a satellite.’

This fact is verified on : March 15, 2010.





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