View on YouTube Mysterious ‘Unseen Planetary Mass’ Lurking at Edge of Solar System?
A mysterious, unseen, planetary object with a mass somewhere between that of Mars and Earth may be lurking in the outer reaches of our solar system, according to new research.
Scientists at the University of Arizona’s Lunar and Planetary Laboratory (LPL) put forward evidence that this unknown “planetary mass object” may explain why the plane of the solar system is warped in the outer reaches of the Kuiper Belt.

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