Is Planet 9 Actually A Primordial Black Hole?

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From Forbes.com:
"Conventional theory has it that Planet 9 —- our outer solar system’s hypothetical 9th planet —- is merely a heretofore undetected planet, likely captured by our solar system at some point over its 4.6 billion year history.

But Harvard University astronomers now raise the possibility that orbital evidence for Planet 9 could possibly be the result of a missing link in the decades-long puzzle of dark matter. That is, a hypothetical primordial black hole (PBH) with a horizon size no larger than a grapefruit, and with a mass 5 to 10 times that of Earth."

https://www.forbes.com/sites/brucedormi ... 07c0e34d80

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[KingNothing13]

Huh - would be cool if they could actually prove it out. Not sure I'd call it "Planet 9" though.

Not that I would really understand any of it.

[helicon]

Grapefruit? This is indeed unique. Thanks Stephen