There may be thousands of “black hole planets” around the central black hole of the Milky Way.

Beijing time, August 6, according tomedia reports, our universe stars dot distribution of several supermassive black holes, these huge gravitational traps can hold galaxies together, forming a swirling dust, outward emission of bright X-ray beams. Sometimes, the two poles of a black hole emit bright material jets out, visible in space. Now some scientists suspect that these giant gravitational “monsters” may contain tens of thousands of “blanets”.

 The “black hole planet” around the black hole may be several light-years away.

This is not a misspelled word for “planet”, but a combination of the words “black hole” and “planet”. These black hole planets may have originated from clouds of dust that rotate around black holes and are not much different from ordinary stars orbiting stars. Some may be earth-like hard rocky planets, but they may be ten times larger than Earth. Some may be big planets similar to Neptune. The planets are hiding in the disk of matter that gave birth to them, tiny and invisible compared to the giant black holes nearby. But in two papers published in November 2019 and July 2020, the researchers suggest that these black-hole planets must exist.

Not every supermassive black hole is surrounded by black hole planets. It is more difficult for matter to evolve around a black hole into a hard ball than in the disk of protoplanets around stars. The dust and gas that rotate around the supermassive black hole is much smaller than around the star, and the material that falls into the event horizon forms a hot and bright coronal ring, so it is not possible to form ice in the surrounding dust disk. Ice is one of the key parts of planetary formation. Keiichi Wada, an astrophysicist at Kagoshima University in Japan and lead author of the study, points out that ice-covered dust particles combine when they collide, just as they stick together when two pieces of ice collide, while ordinary pebbles do not. Over time, these clumps will get bigger and bigger, and the gravitational pull will gradually increase, attracting more and more dust. When the clumps grow large enough, they will evolve into rocky planets.

Similarly, black hole planets are also difficult to form without frozen water or carbon dioxide (i.e. dry ice). The researchers found that some black holes rotate around the plate of matter that form a “snow line” that will drop low enough to form ice outside the snow line range.

“Outside the snow line, dust particles are covered in ice, so it’s easy to stick together when it collides.”

In areas outside the snow line, these clumps grow and eventually form rocky planets. The process took about 10 million years. If these rocky protoplanets attract enough gas, they will eventually become gas giant planets. However, none of this would have happened if the dust particles had not been covered with a thin layer of ice. As a result, dark, cold supermassive black holes, such as those in the middle of the Milky Way, are most likely to be home to these strange planets.

Wada points out that the formation of black hole planets is not surprising in a sense. The protoplanetary disk is similar to the vortex of matter around the black hole. But no one has ever studied whether there are planets forming around supermassive black holes. “Perhaps it’s because researchers in the field of planetary formation don’t know anything about active galactic nuclei (the regions around supermassive black holes in the center of the galaxy), and vice versa.”

Wada and his co-authors are still working on the specifics of the black hole planetary theory. In a paper published in 2020, they revised and updated the model published in 2019. He said the previous model of black hole planets was too “fluffy” to form large, less dense planets. The updated model can form more denseand, more realistic planets. They also improved their understanding of the dust surrounding supermassive black holes. The dust around the black hole is more sparsely distributed around the star than it is around the star, and the researchers further analyzed how dust would behave when it collided in a thin gas environment.

Wada points out that it’s hard to imagine what the surface of these black-hole planets will look like. The distance between black hole planets and to black holes is much greater than the distance between Earth and other planets and the sun. Black hole planets to black holes may be more than a dozen light-years apart, appear isolated from the world, the shape of a single shadow.

Wada noted that so far, there is no way to know if there may be life on the black hole planet. Can the strange ultraviolet and X-ray radiation released by the coronal ring of a black hole allow aliens to thrive in such a lonely corner of the universe? Is there also aliens on the black hole planet looking up at stars in space and wondering if there are rocks and gas-forming spheres around them? Do they call the planets around these stars “slanet” (stars) and “planets”? (Leaf)