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
By system
September 16, 2026 •
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Original source:
Universe Today
