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Pluto has an elliptical orbit.  It is usually further from the sun than any of the eight planets, but there are times due to its odd orbit when it is closer than [[Neptune]].<ref>http://science.jrank.org/pages/5352/Pluto.html</ref>

Pluto has an elliptical orbit.  It is usually further from the sun than any of the eight planets, but there are times due to its odd orbit when it is closer than [[Neptune]].<ref>http://science.jrank.org/pages/5352/Pluto.html</ref>

== Pluto's Origin ==

== Pluto's origin ==

Pluto was initially thought to have originally been a [[moon]] of [[Neptune]] that escaped into its own orbit around the [[Sun]]. But with the discovery of [[Charon]] in 1978, and the subsequent discoveries of its other moons [[Hydra (moon)|Hydra]] and [[Nix]], that theory became far less plausible.  The current theory is that Pluto and Charon both formed from the [[nebula hypothesis|solar nebula]] as the other planets in the solar system did. <ref>http://www.britannica.com/eb/article-54312/Pluto</ref>

Pluto was initially thought to have originally been a [[moon]] of [[Neptune]] that escaped into its own orbit around the [[Sun]]. But with the discovery of [[Charon]] in 1978, and the subsequent discoveries of its other moons [[Hydra (moon)|Hydra]] and [[Nix]], that theory became far less plausible.  The current theory is that Pluto and Charon both formed from the [[nebula hypothesis|solar nebula]] as the other planets in the solar system did. <ref>http://www.britannica.com/eb/article-54312/Pluto</ref>