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Defining the age of a moon is very difficult, especially Triton.

Because Triton is more than likely, a captured KBO (Kyper belt object) it can be said to be part of the original formation of the Solar System at about 4.6 billion years old.

However, it's surface is relatively young - in astronomical terms - with regions varying from 50 million years old to just 6 million years old.

I think a lot depends on "what" part of Triton!

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14y ago

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