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Pluto has at least three [[moon]]s, the largest of which is [[Charon]]. (The size of Charon is such that Pluto and Charon are often collectively considered to be a binary system.) Pluto has an elliptical orbit.  When it was considered to be a planet, it was usually the furthest from the sun, but there are times due to its odd orbit when it is closer than [[Neptune]].  Relatively little is known about Pluto. <ref>http://science.jrank.org/pages/5352/Pluto.html</ref>  

Pluto has at least three [[moon]]s, the largest of which is [[Charon]]. (The size of Charon is such that Pluto and Charon are often collectively considered to be a binary system.) Pluto has an elliptical orbit.  When it was considered to be a planet, it was usually the furthest from the sun, but there are times due to its odd orbit when it is closer than [[Neptune]].  Relatively little is known about Pluto. <ref>http://science.jrank.org/pages/5352/Pluto.html</ref>  

Pluto is the second-largest known [[dwarf planet]] in the solar system (after [[Eris]]) and the tenth largest observed body directly orbiting the [[Sun]].<ref>http://www.space.com/scienceastronomy/070614_eris_mass.html</ref>

Pluto is the second-largest known [[dwarf planet]] in the solar system (after [[Eris (dwarf planet)]]) and the tenth largest observed body directly orbiting the [[Sun]].<ref>http://www.space.com/scienceastronomy/070614_eris_mass.html</ref>

==References==

==References==