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Trans-Neptunian object

any object in the Solar System that orbits the Sun at a greater average distance than Neptune
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Trans-Neptunian object or TNO is a name astronomers give to any minor planet in the Solar System which orbits (travels around) the Sun beyond the planet Neptune. There are over a thousand Trans-Neptunian objects.[1] Many are in the Kuiper belt.

Eris and its moon Dysnomia are both Trans-Neptunian Objects

References

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  1. ↑ Minor Planet Center. [1]



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