Technically, the gravitational evidence for a ninth planet … So the hunt for Planet Nine, they suggested, should include a search for moving sources of x-rays, gamma rays, and other types of radiation, since those clues could indicate the edges of a black hole. The Physics arXiv Blog By The Physics arXiv Blog May 7, 2020 6:00 PM These eTNOs tend to make their closest approaches to the Sun in one sector, and …
“If it exists and is not a statistical fluke, ‘Planet Nine’ is most likely a planet, not a black hole,” said lead author Siraj in an email to me last week. Instead, it could be a tiny black hole. They say that Planet 9 … There's increasing evidence of another planet out there at the extreme edge of the solar system, but a new analysis suggests that may not be a planet at all. Theoretically, yes, it could be, just like the Earth could become a black hole. If Planet Nine Is a Tiny Black Hole, This Is How to Find It Our best bet could be to send a swarm of nanospacecraft — propelled from Earth by a powerful laser — to take a look. Our solar system's mysterious 'Planet 9' may actually be a tiny, ancient black hole A new theory suggests that a so-called primordial black hole may lurk beyond Neptune in the outer solar system.

To begin with, if Planet Nine is a planet-mass black hole, its gravitational pull on TNOs would be exactly the same.

If Planet 9 is indeed a black hole, how does that change the search? Such an object might have …
Scholtz and Unwin explore this idea today.

Astronomers think there’s another planet in our solar system, but no one has been able to see it. If that’s the case, we are much closer to a primordial black hole than we ever imagined. Its gravitational effects could explain the unusual clustering of orbits for a group of extreme trans-Neptunian objects (eTNOs), bodies beyond Neptune that orbit the Sun at distances averaging more than 250 times that of the Earth. PLANET Nine, the mysterious object lurking on the edge of the solar system which was theorised to be a huge planet, could actually be an ancient black hole, researchers have announced. The hypothetical Planet Nine, assumed to be lurking somewhere in the outskirts of our solar system, may not be a planet at all. Is “Planet 9” actually a primordial black hole? Planet Nine is a hypothetical planet in the outer region of the Solar System. A new study, published September 24 … The Planet 9-black hole theory then explains two mysteries: the trans-Neptunian object anomaly and the OGLE anomaly. Primordial Black Hole (PBH): However a recent paper that appeared in arXiv [2] (two days back) proposed a whole new, ‘little outrageous’ idea of what this hypothetical Planet 9 could be. The authors say current scanning methods won’t do any good. "These two things point at the same mass range," Unwin said. If Planet Nine really was a tiny black hole, it would explain why astronomers have been having such a difficult time locating it - not only would it be imperceptibly small, but it would also be invisible. A primordial black hole 10 times the mass of Earth would be roughly the size of a bowling ball. Planet Nine may be a black hole the size of a baseball A slew of oddly orbiting objects indicates a massive planet is hiding in the outer solar system. Theoretically, yes, it could be, just like the Earth could become a black hole.