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Trans-Neptunian object




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Eris and its moon Dysnomia are both Trans-Neptunian Objects

Trans-Neptunian object or TNO is a name astronomers give to any minor planet in the Solar System which orbits (goes around) the Sun beyond the planet Neptune. There are over a thousand of them.[1] Many are in the Kuiper belt.

References

  1. Minor Planet Center. [1]