is planet 9 a premordial black hole discovered in our solar system.
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Primordial black holes are hypothetical objects formed during the early moments of the big bang. If they exist, they would have the mass of a planet rather than a star. If Planet Nine is a primordial black hole, then it would be about the size of an apple.
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Astronomers think there’s another planet in our solar system, but no one has been able to see it. That could be because it’s not a conventional planet at all.
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