How close does the Earth have to be to the black hole to be visible to the naked eye?

According to the explanation of scientists,When the Earth is closest to a black hole, it cannot be observed with the naked eye.

Black holes have always been a topic that ordinary people as well as scientists like to pay special attention to. But scientists like Hawking are only scratching the surface of black holes, because the problem of black holes is very profound and complex, and its changes and movements are irregular, or he has regularities, but it is difficult for us to find them, and we have not found them yet. But black holes are not a good thing, black holes have a very strong adsorption capacity, scientists explain that asteroids that are millions of kilometers away from black holes will be attracted to black holes.

Therefore, if the black hole is too close to the earth, everything on the earth, including the earth itself, may be sucked into the black hole, which is a disaster for the entire human society and all life on the earth. Fortunately, after the analysis of scientists, although there is great uncertainty about the movement of black holes and the formation of black holes, the probability of black holes appearing in the solar system is very low, and we can be relieved a little. But nothing is certain, and we would do well to pray that black holes don't appear in the solar system.

Next, let's analyze the black holeA black hole, like its name, is a black hole that does not emit light on its ownThe light of the black hole we usually see is not formed by the black hole itself, it is a relatively special physical phenomenon.

Black holes are always moving and changing, and generally black holes are far away from the Earth. The black hole is at least 2,800 light-years away from Earth, a distance that is invisible to all telescopes on Earth. So where do our usual black holes come from?

What he needs is to work with astronomical telescopes in different parts of the earth and in different directions at the same time to obtain images, and then through the transformation and analysis of the data, he can get an image of the black hole, which is what we see.

It can only be observed at least as close as 1 kilometer, mainly because its color gives people a feeling that it is difficult to observe. So you have to get very close to see how it's changing, and that's a process.

Because black holes do not emit light on their own, they need to be very close to the Earth to be seen, but if they are very close, they will suck the Earth in.

The scientific calculation results are about 2,800 light years, and in order for humans to observe a black hole, the light of the star must be reflected outside the black hole capture range, and then passed into the human eye to see the black hole.

The first is that the nearest known black hole is only 1,600 light-years away from Earth. Ophiuchus, a star very similar to the Sun, shows strange trajectories, suggesting that it is being pulled by an invisible celestial body. There is also a black hole around the star that is 10 times more massive than the Sun.

The distance between two celestial bodies is roughly equivalent to the distance between the Sun and Earth, and if you live on a planet orbiting a star, you will see a black hole as bright as Jupiter.

The second is that when a massive star reaches the end of its life, it collapses under its own gravity, forming a stellar black hole. In a binary system where two stars revolve around a common center, if one of the stars dies, a black hole and a glowing companion star are formed. Scientists mainly detect black holes by the X-rays emitted by them when they absorb material from companion stars.

A dormant black hole is a black hole that does not emit high-intensity X-rays. It rarely interacts with its surroundings, so it is particularly difficult to spot.

Then there are about 100 million years after the birth of the universe, and the first black holes in the universe have appeared. In other words, compared to the farthest known black hole from Earth, it appeared about 100 million years earlier. Scientists do not believe that supermassive black holes appeared in the early universe.

This discovery also means that there must be some unknown formation mechanism for supermassive black holes, even very special. More dormant black holes are found in our galaxy, and there may be tens of thousands of black holes like this.

It is important to know that since the existence of black holes was first confirmed by mankind, the study of black holes has never stopped. At the same time, as a speck of dust in the universe, there are still many unknowns, especially about the future fate of the earth, which scientists are very worried about, because it is related to the normal growth of life on the earth. For humans, the Earth is the only celestial body known to be suitable for human habitation.

If the Earth can't stay, it's unlikely that it will stay in other celestial bodies.

Scientists have discovered that the closest known black hole to Earth is only about 1,560 light-years away from our Earth.

This distance does not seem like much compared to the diameter of the Milky Way that we have now observed.

Until now, we have detected a conservative estimate of the diameter of the Milky Way galaxy at a few hundred thousand light-years.

So 1560 light years doesn't seem so far away.

So when it comes to the fact that this black hole is so close to us, everyone will first have such a doubt.

Will this black hole pose a threat to our planet?

Let's find out today.

First of all, the mass of this black hole is only ten times the mass of the sun.

A black hole with ten times the mass of the Sun is not considered a massive black hole in the black hole domain.

It is not like the supermassive black holes of galaxies** that can devour everything around it.

And it emits intense X-rays.

There are generally three ways in which black holes are formed.

The first is the collapse of massive stars after death.

The second is formed by the direct collapse of stars or gas clouds.

The third is formed by the combination of neutron stars, and finally the explosion of kilonova.

And we humans have four ways to detect black holes.

The first method is to look at the X-rays released by the black hole as it devours the surrounding material.

The second is the gravitational waves generated when a black hole merges with a black hole.

The third way is the microgravitational lensing phenomenon.

When a black hole passes between a person and a background light source, the background light source will be magnified or distorted around the black hole as observed by our eyes.

At this point, we can determine the position and state of the black hole.

The fourth method is the radial velocity method.

The Gaia BH1 black hole, which is closest to our Earth, is achieved in this way.

Black holes observed in this way usually have a companion star around them.

We can do this by observing the redshift or blueshift of the star away from or near the Earth.

This allows you to determine the state of a nearby black hole.

And the black hole discovered by scientists 1,560 light-years away from our Earth does not emit super-strong gamma rays.

So it will not threaten our planet.

If you look at our Milky Way, there are actually many black holes in the Milky Way.

Because the age of the birth of the Milky Way is more than 13 billion years old.

In this more than 13 billion years of history, many massive stars have actually died long ago.

This means that the Milky Way galaxy is littered with massive star corpses.

It's just that the current level of science and technology of our human beings is too low-level, and there is no way to observe all of them, and only some of them can be detected.

Whether it's analyzed from the time scale of the Milky Way, or from the distance scale.

The probability that our solar system seems to be visited by black holes is very low.

If you look back at the history of the birth of human civilization on our earth, up to now, the earliest human beings have only been around 6 million years.

These millions of years seem like nothing to the entire galaxy of more than 13 billion years.

Perhaps by the time the black hole reached our earth, the earth's human civilization had already disappeared.

The closest anti-black hole to Earth is only 1,600 light-years away, but this number is too large for humans.

It is 1,600 light-years away from the Earth, which is still relatively far away, and there is no need to worry about it at all.

The closest black hole to Earth discovered so far is Cygnus x 1.

Cygnus x 1 is a source of intense X-ray radiation located in the constellation Cygnus. Discovered in 1965, it is a binary star system and was the first celestial system to be thought of as a black hole. This binary star system consists of a spectral O9-Bo supergiant star and a compact star.

Supergiants have about 20-40 times the mass of the Sun, while compact stars have a mass of the Sun. Since the maximum mass of a neutron star is no more than 3 times the mass of the Sun, the compact star is considered a black hole. X-rays are produced by an accretion disk within a binary star system, where Compton scattering occurs and is reflected outward.

Cygnus X-1 is about 10 times the mass of the Sun and is about 60 kilometers in diameter. Located about 6,000 light-years from Earth, it is the closest black hole to Earth.

Cygnus X-1 looks roughly like this.

The center of the Milky Way, which is the closest black hole in the Milky Way.

Astronomers make observations of this through special astronomical telescopes, and the main purpose of studying black holes is to avoid the serious impact of black holes on the earth, and the destructive power of black holes is also huge.

It was observed through some astronomical telescopes. In order to study some phenomena in the universe, we are also studying some planets, in order to make better observations.

This is because astronomers are constantly making observations, and through some astronomical instruments, they also see some of the components and compositions of the universe. Of course, to prevent some disasters from happening, to study how these planets have changed?

Black holes are formed as a result of the collapse of stars. Black holes are one of the most powerful celestial bodies in the universe, and they are massive enough to swallow everything around us, making it impossible for us to escape its gravitational pull. Black holes are massive enough to swallow everything, including the mass of the world around them.

Although this does not mean that there is no other substance that can escape its gravitational pull.

Astronomers have discovered the closest black hole to Earth.

On November 4, 2022, astronomers discovered the nearest known black hole nearly 1,600 light-years away from Earth, which is reported to be 10 times the mass of the Sun, and previous records held three times the distance from Earth to Earth. It is not yet clear how this black hole formed in the Milky Way. Named "Gaia BH1", it is located in the constellation Ophiuchus.

What is a black hole?

Black holes, like the sun in the universe, have a high-quality and light-efficient core structure. This means that black holes cannot escape its power, even if they have a mass of their own. According to Einstein's general theory of relativity, a black hole is a celestial body with infinite mass because it cannot escape its power.

According to the special theory of relativity, the gravitational pull of a black hole is greater than the speed of light because it cannot exist at rest. As a result, it is unable to move or burn anything in the dark. However, special relativity also states that black holes are celestial bodies that are larger than the speed of light.

How are black holes formed?

The early universe was a chaotic world, and it didn't form at one point. Instead, it is covered by a galaxy formed by a single star. When these galaxies collide together over billions of years, they form a special way of contact between stars and galaxies.

The mass of these stars is small and will be gradually compressed over time. Once they are compressed small enough, they collide with another star to form a larger star, allowing the galaxy to remain for a longer period of time. But because stars are very dense, they also become less massive, just like the normal sun, and the stars will start to get larger as they expand.

There are stars that are big enough to be formed by gravitational collapse after they run out of fuel and die after a nuclear fusion reaction.

Black holes are caused by gravitational collapse, and they are capable of absorbing everything, even light.

Black holes are formed by the collapse of stars after nuclear fusion, and they are very large substances.

Black holes are formed after the demise of many planets. And black holes are particularly mysterious, everything that comes close to them will be absorbed, so black holes are dangerous.