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Possible 'Planet Y' Discovered in Kuiper Belt Tilt

10/13/2025

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Summary

Story summary

Princeton University scientists report a tilt of about 15 degrees in the Kuiper Belt, suggesting a possible undiscovered planet named 'Planet Y'.
The tilt raises questions about the Kuiper Belt's flatness, which typically aligns with the solar system's plane.
Earlier theories attributed the anomalies to Neptune's mass.
The Vera C. Rubin Observatory in Chile will conduct a decade-long survey that could detect such planets within two to three years.

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Story summary

Princeton University scientists report a tilt of about 15 degrees in the Kuiper Belt, suggesting a possible undiscovered planet named 'Planet Y'.
The tilt raises questions about the Kuiper Belt's flatness, which typically aligns with the solar system's plane.
Earlier theories attributed the anomalies to Neptune's mass.
The Vera C. Rubin Observatory in Chile will conduct a decade-long survey that could detect such planets within two to three years.