Last Updated
：2025/11/20
trans-Neptunian object
Noun
Japanese Meaning
太陽系において、軌道の全または大部分が海王星の軌道の外側に位置する自然天体。通常、小惑星や仮説惑星がこれに該当する。
（ plural ）
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(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
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trans-Neptunian object
The newly discovered trans-Neptunian object has a highly inclined orbit that challenges current models of outer Solar System formation.
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The newly discovered trans-Neptunian object has a highly inclined orbit that challenges current models of outer Solar System formation.
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