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

September 16, 2026 Universe Today

For Trans-Neptunian Objects, The Past Is Written On Their Surface
By Brian Koberlein (https://ift.tt/htW1vel)

This artist’s concept depicts a Trans-Neptunian Object, a small, faint, icy body orbiting the Sun beyond the orbit of Neptune. Credit: NASA, ESA, Leah Hustak (STScI)

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.

September 16, 2026 at 10:55PM
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