How many dwarf planets do we know in our solar system?
At the moment, only five celestial bodies were defined as dwarf planets by the International Astronomical Union (IAU): Pluto, Makemake, Haumea and Eris in the Kuiper Belt (beyond Neptune) and Ceres, in the asteroids belt between Mars and Jupiter. Candidates are Sedna, Orcus, Quaoar and Varuna, all trans-Neptunian objects.
http://solarsystem.nasa.gov/planets/profile.cfm?Object=Dwarf
Artist’s view of Eris (left), Pluto with Charon (bottom), Ceres (middle), Moon (top) and Earth. Credit: NASA
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