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plutoid

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plu·toid  (pltoid)
n.
A dwarf planet that orbits the sun at a greater distance on average than Neptune.
[Pluto + -oid.]
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The other planet recently classified as a Plutoid was Eris, a small dwarf planet that also orbits the Sun beyond Neptune.
Pluto stripped of name! by Kidsworld Magazine
The additional classification as a plutoid makes clear where in the solar system Pluto and other objects like it reside.
Pluto, plutoid: what's in a name? by Cutraro, Jennifer / Science News for Kids
Besides Pluto itself, the only other known plutoid is Eris which is a shade larger than Pluto and orbits the Sun every 557 years, as opposed to Pluto's 258 years.
Spacewatch by guardian.co.uk / guardian.co.uk
 
 
 
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