Planetoids are a classification of Kuiper Belt objects that are planet-like but do not have and/or contain the elements necessary to be considered a planet. Whether it be the planetoids' mass, density, atmosphere or any of the various contents that form the planets of our Solar System.

Scientists estimate there may be up to 70 dwarf planets amongst outer solar system objects that have been discovered already.


An object now thought to be smaller than Pluto, was, at the time of its discovery was thought to be the biggest so far, was discovered in a reanalysis in 2005; it was named Eris.

Eris *

Another minor planet that was discovered in November 2003 but not announced until March 2004 is Sedna.

Sedna *

A new dwarf planet, 2005 FY9 (Makemake), was discovered on March 31, 2005, by a team led by Mike Brown of the California Institute of Technology. It became the fourth dwarf planet and third plutiod, officially in July 2008.

Makemake *

Another recent dwarf planet that been recently named in 2008 is Haumea, discovered by José Oritiz and Micheal Brown on 28th December 2004.

Haumea *

Ceres is the smallest dwarf planet identified. It is the only dwarf planet located within the asteroid belt and was discovered by Giuseppe Piazzi. It is named after the Roman goddess Ceres, the goddess of growing plants, harvests, and motherly love. It has a diameter about 950 km and is the largest body in the asteroid belt.

( * = by clicking on the link, you can find more information on the dwarf planets mentioned.)

Some Known Dwarf Planets












You are going to organize this, right?

leesonma 04:11, 6 March 2009 (UTC)
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