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Is Planet 9 Actually a Primordial Black Hole?

In a paper accepted for publication in The Astrophysical Journal Letters, the co-authors argue that observed clustering of extreme trans-Neptunian objects suggest some sort of massive super-earth type body lying on the outer fringes of our solar system. Perhaps as much as 800 astronomical units (Earth-Sun distances) out. The authors propose that a unique wide-field survey telescope, now under construction in Chile, will soon allow them to set new limits on the possibility that Planet 9 may indeed be a PBH instead of just an ordinary planet. If they exist, such PBHs would require new physics and go a long way towards solving the mystery of the universe’s missing mass, or dark matter.

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