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Nine Planets
The Nine Planets: Small Bodies
This site explores the smaller bodies in the solar system, namely the various asteroids and comets. Links are also provided for additional information on related subjects.
California Institute of Technology
The Discovery of Eris, the Largest Known Dwarf Planet
Until the discovery of Eris, Pluto was known as the largest Keiper belt object. This dwarf planet has replaced Pluto in size and is accompanied by a satellite that has been given the name Dysnomia. Learn about this distant world here...