Which is the smallest black hole in the universe? How old is it?

There is no smallest, only smaller in the imagination, and the smaller one is smaller than the nucleus. Because we can't describe its size.

Which is the smallest black hole in the universe?

1. The smallest black hole ever observed by mankind is a black hole called XTE J1650-500, which is only 24 kilometers in diameter and only twice the mass of the Sun. The black hole was discovered in a binary star system, and although it is small, it is devouring its companion star. This is also the reason why scientists are able to observe it.

2. The black hole mentioned above is only the smallest black hole observed by humans, but humans do not know how small the smallest black hole in the universe is. However, scientists estimate that there is another type of black hole in the universe that is very small in size but very massive, and the volume is much smaller than you think.

This type of black hole is called a primordial black hole by scientists, also known as a primordial black hole. Primordial black holes are different from black holes in our general sense in that they did not arise after the death of stars, but shortly after the universe was large. Scientists believe that at the beginning of the universe, due to ultra-strong pressure and ultra-high temperatures, certain regions with very high material density will form primordial black holes.

Theoretically, primordial black holes are smaller than ordinary black holes, and the smallest primordial black holes may be so small that they cannot be seen by the human eye, or even the size of an atom. Although it can be small in size, it has a lot of mass. Such black holes are generally more stable than those formed by stars, so scientists believe that primitive black holes still exist throughout the universe.

But humans have yet to find a primordial black hole.

Scientists have proposed two ways to find primordial black holes. One way is to use Hawking radiation, which NASA used to try to find the existence of primordial black holes using the Fermi Gamma ray telescope, but unfortunately no trace of it has been found to this day. There is another way to do this by observing changes in the surface of the star.

Because if a small black hole passes through a star, then its density will allow us to observe vibrations, and some planets will even be affected. If this small black hole exists, it is a primary black hole, because today's black holes cannot form black holes with very little mass.

Scientists study primordial black holes, of course, not just for the sake of themselves. If it is proved that there really is a primordial black hole, then it is possible to solve the problems of the existence of dark matter, the universe domain wall, and the unipolar one. This has a very important impact on physics.

Although the smallest black hole in the universe has not yet been discovered, scientists believe that such black holes should exist widely in the universe and are waiting to be discovered.

3. In summary, we can't just look at the surface of anything, and many people think that studying various celestial bodies in the universe is not helpful for the current human race, but in fact it is completely the opposite. The study of celestial bodies in the universe can enable mankind to grasp more laws of the universe, improve the basic science of mankind, and accelerate the progress of human civilization.

In August 2019, scientists discovered a super-large black hole equivalent to 40 billion times the mass of the Sun in the constellation Cetus, about 700 million light-years away from the Earth, which is the black hole at the center of the Holmberg 15a galaxy.

In the summer of 2019, a joint team of astronomers came to the Parina Observatory in southern Chile and began a month-long academic study of the Red Borg 15a galaxy, 700 million light-years away. Astronomers have used more precise and complex calculations to discover the existence of this black hole, which is equivalent to 40 billion times the mass of the sun, and its radius is even more than the orbits of all the planets in the solar system combined, according to scientists, this black hole and ton618 in the constellation Canis can be called the largest black hole known to man.

The scientist's study of the formation of supermassive black holes has provided new ideas, and scientists speculate that in about 4 billion years, our Milky Way Ridge System will also collide with the Andromeda Galaxy, which is likely to give birth to even more massive black holes.

The mass of the ton618 black hole is 66 billion times that of the sun, and it is considered to be the largest single celestial body in the universe, comparable to 1 23 times the total mass of the Milky Way, more than 15,500 times the mass of medium-sized black holes in the Milky Way, and larger than the mass of many small galaxies, for example, it is a mass of the Milky Way's close neighbor of the Great Magellanic Galaxy, which is equivalent to more than 100,000 times the mass of the smallest known galaxy, Segret 2, and its strong gravitational pull allows it to swallow the mass equivalent of 91 Earth's masses every day.

Astronomers have estimated the massive mass of Ton 618 from the correlation of hydrogen rays, which is 10.4 billion light-years away, but it can still be seen brightly in astronomical telescopes, and it was discovered in the 60s of the last century. It is estimated that Ton618 has a diameter of 400 billion kilometers, which is much larger than the largest star, Stephenson 2-18, and millions of times larger than the post-lead hailist.

How black holes are formed.

The black hole consists of a scalar polynomial constructed from the Riemann curvature tensor in the center of the singularity that diverges here and the surrounding space-time, and its boundary is a one-way membrane that only enters but does not exit: the event horizon, and Huai Jianfan is not visible within the range of the event horizon. According to Einstein's theory of general relativity, when a dying star collapses, it will collapse toward the center, where it will become a black hole, swallowing up all light and any matter in the adjacent universe.

The creation of a black hole is similar to that of a neutron star: a star is preparing to be destroyed, and its core is rapidly shrinking and collapsing under the force of its own gravity. When all the matter in the core is turned into neutrons, the contraction process immediately stops, and it is compressed into a dense star, which also compresses the space and time inside.

But in the case of black holes, the mass of the star's core is so large that the contraction process goes on endlessly, and even the repulsion between neutrons cannot be stopped. The neutrons themselves are crushed into powder by the attraction of the squeezing gravity itself, leaving behind a material of unimaginably high density. The gravitational pull due to the high quality is such that any object that comes close to it will be sucked into it.

The largest black hole: The largest known black hole is called SDSS, with a mass of 196 billion times that of the Sun.

Smallest black hole: The smallest black hole found so far is designated IGR J17091-3624 and is only 3 times the mass of the Sun. Although we have not observed all the black holes in the universe, they are not much larger than the smallest black holes in the universe because they are close to the lower limit of the mass of black holes in scientific theory.

So, what is the event horizon radius of this black hole? According to the formula for calculating the Schwarzschild radius, the radius of this black hole is only about 9 kilometers. After all, this distance only takes about an hour and a half to walk.

The largest black hole, more than 100 billion times more massive than the Sun. The smallest black hole, about three times the mass of the Sun.

How big is a cosmic black hole?

The black hole itself is very small, it is a small point formed by the star when it dies, the smaller the volume, the smaller the mass, the greater the density, so the gravitational force is very large, and the surrounding matter is sucked over, forming a group of matter, the black hole itself is very small, but it accretes the surrounding matter, and the surface of the black hole is cosmic dust. Hope it works for you!

And because of its gravitational pull, even the fastest light in the universe can't escape. So, there is no practical physical significance to how big a black hole is that light is not reflected, because people don't have an exact answer, and the Schwarzschild radius is only one.

There is no real physical meaning about how big a black hole is, because there is no exact answer, and the Schwarzschild radius is only an approximation and uncertain quantity. A black hole can only be sure if it estimates its mass density.

If you have to ask about size, modern physics believes that there are both super black holes as large as the center of galaxies and miniature black holes as large as the Earth, all of which are approximate and have no exact boundaries.

He's not bulky, it's just a hole, it's hard to tell how big it is.

When a star more than 100 times more massive than the Sun runs out of fuel, its huge gravitational pull compresses its volume to "0", and the density of this point is infinite, and the gravitational force is also extremely large, and it can even bend space and attract everything from light, electricity, and signals (this point is called a black hole).

But there is a reason for the event horizon outside the black hole, which can range from tens of kilometers to a large one.

The universe is finite and boundless [like the surface of the Earth, which has a certain size (i.e., finite) but no edges. The universe is the same, it is finite, but the gravitational pull of the universe itself is so great that it bends the space in the universe back to itself (like a circle, but it is only four-dimensional). ]

There is no matter outside the universe (including time, space, light...).So there is no "thing".

But some scientists believe that there are other "universes" outside of our universe.

Hope to adopt, thank you.

Big and small are relative, but you can never know how big the universe is.

The black hole of the universe is as big as the depth of your thoughts. That's an unknown.

How big is a cosmic black hole?