trans-Neptunian object
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English[edit]
Alternative forms[edit]
Noun[edit]
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 Neptune.
- Synonym: (initialism) TNO
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See also[edit]
- trans-Neptunian object on Wikipedia.Wikipedia