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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
The paper also ruled out the possibility that the mysterious object could be ‘Planet 9’, pointing out that this planet is predicted to be much bigger
a reply to: trollz
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