Planet 9: Are We Really Dealing with a Black Hole Here?

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Planet Nine may have gotten too close to Jupiter or Saturn, they suggested, and been flung out to the edges of the solar system, where it now follows an eccentric orbit and influences the Kuiper Belt objects. A new study now suggests that the gravitational pull could come from a primordial black hole- a small black hole that scientists have theorized formed during the Big Bang.

According to the research published in the online science journal arXiv, the tiny black hole could be just the size of a wallet, but still have 10 times the mass of Earth.

This intriguing conjecture is presented by physicists Jakub Scholtz with Institute for Particle Physics Phenomenology at Durham University and James Unwin, theoretical particle physicist at the University of IL at Chicago, in a paper published on the arXiv preprint server this week challenging the work of Caltech's Mike Brown and Konstantin Batygin, who predicted the existence of a ninth planet in the outer solar system in 2016. Although we can't detect dark matter directly, we can look for dark matter particles interacting and creating bursts of gamma rays which would give a clue to the presence of a black hole. Now, a different team of astronomers has suggested an even more intriguing idea: That the odd body we're seeing evidence of is not a planet but a miniature black hole. Most galaxies are believed to revolve around such black holes, and we tend to think of these ultra-dense collections of mass as incredibly destructive things that feast on whatever gets near.

Some say Nibiru is, in fact, Planet Nine. Without this distant planet, BP519 might've had a behavior which could not be explained.

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Primordial black holes are hypothetical black holes that formed soon after the universe. "One explanation is that Planet Nine was once a free-floating world, meaning a planet with no host star, that was ensnared by the Sun's gravity". Super-Earths are planets with a mass greater than Earth's, but substantially less than that of a gas giant. What if it isn't actually a planet but a black hole! It could be one black hole the size of a bowling ball with the mass of 10 Earths, or a number of smaller primordial black holes that add up to that mass. So the hunt for Planet Nine, they suggest, 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 hypothetical Planet Nine has never been observed by scientists, and it's still unclear if it actually exists. This scenario could be confirmed through annihilation signals from the dark matter microhalo around the PBH,' Scholtz and Unwin write.

TNOs are any object in the Solar System beyond the orbit of Neptune, including those that make up the Kuiper Belt, a vast disc of small bodies that orbit the Sun.

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