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Definition 2025
trans-Neptunian_object
trans-Neptunian object
English
Noun
trans-Neptunian object (plural trans-Neptunian objects)
- (astronomy) Any natural object (usually a minor planet (asteroid) or a hypothetical planet) in the Solar System with all or most of its orbit outside the orbit of planet Neptune
Synonyms
- TNO (abbreviation)
Hyponyms
- Kuiper belt object (KBO)
- resonant trans-Neptunian object
- scattered-disc object (SDO)
- detached object
- extreme trans-Neptunian object (ETNO)