What is a black hole outside the sky, and where does a black hole come from?

Introduction to Black Holes] A particularly dense dark object predicted by general relativity. Massive stars collapse at the end of their evolution, and their matter is so dense that it has a closed boundary called the "event horizon", and the black hole hides a huge gravitational field that is so strong that any matter, including photons, can only enter and cannot escape. The lower limit of the mass of the nucleus of the formation of a black hole is about 3 times the mass of the sun, which, of course, is the mass of the last nucleus, not the mass of the star in the main sequence period.

In addition to this stellar black hole, there are other black holes - the so-called miniature black holes may have formed in the early universe, and the so-called supermassive black holes may exist in galaxies**. (Reference: New Horizons of the Universe).

Black holes do not allow anything within their boundaries to be seen by the outside world, which is why such objects are called "black holes". We cannot observe it through the reflection of light, we can only know about the black hole indirectly through the surrounding objects affected by it. That being said, black holes have their boundaries, the "event horizon" (event horizon) It is speculated that black holes are remnants of dead stars that are created when a special massive supergiant collapses and contracts.

In addition, a black hole must be formed by a star with a mass greater than the Chandrasekhar limit at the end of its evolution, and a star with a mass smaller than the Chandrasekhar limit cannot form a black hole (Reference: A Brief History of Time - by Stephen Hawking).

A black hole is a supermassive celestial body with an escape velocity within the event horizon.

Exceeding the speed of light and therefore difficult to observe in the universe, the existence of a black hole is usually determined by the movement of surrounding nebulae and stars. Black holes are the general theory of relativity.

Equation ** is a theoretical entity (celestial body). A black hole is formed when a massive enough star is subjected to gravitational collapse, and most or all of its mass is compressed into a small enough region of space to produce an infinite curvature of space-time ("singularity") at that point. The curvature of space-time is so great that nothing, not even light, can escape the "event horizon" or the boundary.

The sun shines and heats up.

It's because the mass is too large that nuclear fusion takes place inside the star.

Constantly releasing energy outward. However, a black hole is a type of celestial body in the universe with a mass of more than several times that of the sun, and in the final stage of evolution, the external material is ejected out, and the core collapses to form a black hole, and the mass of the star is more than 8 times that of the sun. There is also a larger gravitational source in the universe than a black hole, the Milky Way in which we are located.

In the direction of the Virgo Galaxy.

A nearby giant gravitational source fell, and the Milky Way and more than 500 surrounding galaxies moved around the giant gravitational source and fell into it.

Black holes used to be difficult to observe due to the limitations of observation methods, but now they can be determined by the orbit of nebulae, companion stars, and surrounding stars around the black hole. They attract surrounding stars to fall into them, and when stellar material is swallowed, it forms the accretion disk of a black hole. Black holes don't swallow all the time, they release energy at both ends, so their mass changes don't necessarily increase all the time, and like other celestial bodies, black holes form star-like binary star systems.

Orbiting around a common center will also merge due to the gravitational impact between each other.

The escape velocity within the event horizon of a black hole exceeds the speed of light, making it possible for the black hole to appear empty when viewed directly. In fact, it is full of matter and energy, and the energy released from both ends of the black hole, if swept over the Earth at close range, will lead to the destruction of the Earth.

A black hole is a celestial body, not a hole, and the reason why it is said to be a black hole is because it is very unknown and has great harm to our earth, so it is said so.

Celestial body. Because a black hole is a spherical celestial body, it's just that the gravitational pull is so strong that it absorbs light and looks like a hole.

I think it's a celestial body, because it's very large, and there can be some unknown creatures in it.

It is quite possible that they existed in the early days of the universe. Presumably, the ** of these black holes should be the squeezing and expansion of space-time. We all know that black holes are the most mysterious and terrifying objects in the universe.

Its power must not be said too much.

Neither photons, massive stars, nor neutron stars can escape the clutches of black holes. So far, we have only found that "Hawking radiation" and "gravitational waves" are able to ignore the Schwarzschild radius of a black hole and escape from its interior.

And, according to NASA observations, the density of black holes is likely to be greater than we thought. At first, the conjecture of black holes was based on Einstein's "general theory of relativity"; It was later perfected by the theories of Mr. Stephen Hawking. Hawking calculated the average density of black holes by using the period of existence of the "Schwarzschild radius":

About every 100,000 light-years or so, there is a black hole. However, at present, many small galaxies also have black holes in their interiors, which is very puzzling. They are often found in the core of galaxies and are not only responsible for the gravitational system of many stars and planets; And.

The quality is still huge.

Let's take the example of the "galactic black hole" at the center of the Milky Way, which has a mass of about 3.3 million times that of the Sun and a Schwarzschild radius of nearly one light-year. The origin of this black hole has always aroused the exploration and conjecture of many scholars.

Recently, Wayne, a professor in the Department of Astronomy at Columbia University, pointed out in an article that these "large black holes" should have come into being at the birth of the universe with the rupture of Schwarzschild singularity and the expansion of space-time. They are the result of Dimension Squeezing.

In general, it is generally accepted that black holes come from supernova explosions. Therefore, Professor Wayne's assertion has also caused a thousand waves with one stone, and at present, all academic experts are taking turns to argue. The final result is often presented with a breakthrough in fundamental physics.

The black hole that astronomers call is a kind of celestial body with extremely dense and extremely small bodies in the universe. The gravitational pull of a black hole is so great that even light cannot escape. In 1916, the German astronomer Karl.

Schwarzschild calculates a vacuum solution to Einstein's gravitational field equations, which shows that if a large amount of matter is concentrated in one point in space, there is an interface --- horizon around it that even light cannot escape. This incredible celestial body was invented by the American physicist John. Archibald.

Wheeler named it the "black hole".

Humanity's first black hole**.

The mass of a black hole is so extreme that it has a little density center near its center, which is called a singularity.

When an object approaches the singularity, a huge difference in time and gravity occurs at the slightest distance. In other words, the substance will be shattered.

To clarify, a black hole is not a hole, but a planet, and its interior is made up of distorted dark energy, which greatly distorts both space and time. When an object is shattered and falls onto a black hole, it collides with the black hole and is converted into energy and a pair of positive and negative particles. Most of the energy is used to maintain the distorted space of the black hole (the distorted space has to recover on its own), and although a very small part of the positive particles radiate out, the antiparticles collide with matter on the black hole to form energy, so the black hole is also a celestial body!!

Hello landlord.

A collective term for the various entities in the universe. Interplanetary, interstellar, and intergalactic diffuse matter, as well as various particulate radiation streams, are not usually referred to as celestial bodies.

Black holes are fully possessed of these properties.

The density is so great that light cannot escape, so it becomes invisible black, but it actually exists.

In fact, neutron stars have similar capabilities to black holes. So it's possible that it's the same object.