Discovered in 1930 by astronomer Clyde Tombaugh, Pluto was considered the ninth planet in the Solar System
until its reclassification in 2006 by the International Astronomical Union.
Pluto has four moons, Charon, Nix, Hydra and the yet-unnamed S/2011 P1 discovered in 2011 by a team led by
the SETI Institute's Mark Showalter.
Ceres was the first dwarf planet discovered and is the only dwarf planet located inside the asteroid belt
which lies between the orbits of Mars and Jupiter. It was discovered in 1801 by Guiseppe Piazzi
and is believed to have a surface made up of large amounts of water ice.
To learn more about Ceres, in 2007 NASA launched the robotic spacecraft, Dawn, which is expected to arrive at Ceres in 2015.
Though more or less the same size as Pluto, Haumea's fast four-hour rotation around its axis
has given it an elongated shape which is unique among the dwarf planets.
Haumea is located in the Kuiper Belt
region and has two satellites orbiting around it: Namaka and Hi'iaka.
Also located in the Kuiper Belt
, and discovered in 2010, not much is yet known about this dwarf planet.
It takes Makemake a full 310 Earth years to orbit the Sun and its surface has been detected to contain
The farthest of the known Dwarf Planets, Eris was discovered in 2003 and is believed to be about the same size as Pluto.
Its elliptical orbit
takes it outside of the Kuiper belt, and so far away from the Sun,
that its atmosphere
often freezes and collapses on its surface.
Eris has one known moon, named Dysnomia.