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For Trans-Neptunian Objects, The Past Is Written On Their Surface

Some Trans-Neptunian Objects (TNOs) formed closer to the Sun and migrated to the outer solar system, while others formed there originally. A new study finds that "hot" and "cold" origin TNOs can be distinguished not only by their orbits, but also by their surface color.

For Trans-Neptunian Objects, The Past Is Written On Their Surface

We haven't written up this one. Universe Today has the full story — the link below goes straight to it.

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