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Princeton Astronomers Discover Ancient Structure in Kuiper Belt

11/20/2025

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Summary

Story summary

A team of astronomers from Princeton University has identified potential evidence of a very old, undisturbed structure in the Kuiper Belt.
They describe an inner kernel at approximately 43 astronomical units (AU) that shows low eccentricity, distinct from the previously known kernel at 44 AU.
The findings were published as a preprint and require further observations, particularly from the Vera C. Rubin Observatory's upcoming survey.

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Story summary

A team of astronomers from Princeton University has identified potential evidence of a very old, undisturbed structure in the Kuiper Belt.
They describe an inner kernel at approximately 43 astronomical units (AU) that shows low eccentricity, distinct from the previously known kernel at 44 AU.
The findings were published as a preprint and require further observations, particularly from the Vera C. Rubin Observatory's upcoming survey.