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Scientists Discover Clues to Possible New Planet Y

9/17/2025

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Summary

Story summary

Scientists suggest a potential new planet, named Planet Y, may exist in the Kuiper Belt, possibly 25-450 times more massive than Pluto.
An analysis of over 150 Kuiper Belt objects revealed a warped orbital plane at distances of 80-200 times the Earth-Sun distance.
Researchers estimate a 4% chance that their findings could be false.
The Legacy Survey of Space and Time (LSST) aims to improve detection of Kuiper Belt objects and may uncover Planet Y.
The study appears in the Monthly Notices of the Royal Astronomical Society.

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Story summary

Scientists suggest a potential new planet, named Planet Y, may exist in the Kuiper Belt, possibly 25-450 times more massive than Pluto.
An analysis of over 150 Kuiper Belt objects revealed a warped orbital plane at distances of 80-200 times the Earth-Sun distance.
Researchers estimate a 4% chance that their findings could be false.
The Legacy Survey of Space and Time (LSST) aims to improve detection of Kuiper Belt objects and may uncover Planet Y.
The study appears in the Monthly Notices of the Royal Astronomical Society.