What is a black hole ?

 

black hole
what is a black hole

A black hole is an opening in space from which gravity pulls so much that no light escapes from it. 

Gravity is very strong because the material has been compressed into little space. This happens when the star is dying.

Because the light can't come out, and people can't see these black holes. Because it is not visible to the naked eye.

We can see them only through space telescopes that contain special instruments in order to find black holes.

With these special instruments, you can see how stars very close to black holes move differently from other stars far away.


If black holes are black, how do scientists see them?

We can't see the black hole because the force of gravity pulls all the light into the middle of the black hole.

Scientists were able to see the effect of strong gravity on the stars and gases that are around the black hole. Scientists may be able to study the motion of stars so they can tell if they are flying or orbiting a black hole.


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When a black hole and a star come close to each other, the light produced is high-energy. Such kind of light cannot be seen with the naked eye. But satellites and telescopes in space to be able to see the high light.


black hole at the heart of the Milky Way

Scientists were able to get the second image taken of a massive black hole, but this time a relatively close black hole i.

Today, scientists collaborating on the massive Event Horizon Telescop -EHT- project have captured an image of Sagittarius A, the supermassive black hole orbiting far at the center of the Milky Way.

The first image of a black hole was released and taken in 2019.

This once-mysterious orange image is now a supermassive black hole at the heart of a giant galaxy called Messier 87, or M87, which is 55 million light-years away from Earth. Scientists have verified the circular shape of these holes, which were black holes.


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As we get a newer picture of a black hole that is more massive, scientists are discovering a lot about these mysterious holes. Meredith Clark Powell, a black hole researcher at Stanford University, told The Verge:

"These black holes are so massive, you can't tell how they formed or how they got so big. So it is a very active area.


The EHT team collected about 3.5 petabytes of information

Sgr A* is present in our galaxy, which is why it is difficult for us to see it with the naked eye from Earth.

Following this black hole means looking through the galactic plane of the Milky Way - and all the gaseous matter between our galaxy and the black hole.

 "The result is a picture until we've done all the analysis, it wasn't easy to get," Vincent Fish, an astronomer at MIT Haystack and an associate at EHT, said during the press conference.

The team of scientists had to relay the correct information, by shipping hundreds of hard disk drives to a link center in Westford, Germany, Massachusetts, and Bonn, Fish have, and the supercomputers collected all the signals together.

Then, these signals underwent a process of calibration so intensely, that scientists are trying to create the best images they can get from the silhouette of the black hole and the plasma.

Also, part of this calibration process had to be transmitted online, due to the COVID-19 pandemic that has hit the world.


The M87 resulted in it being exceptional

SGR A* is common, but this picture that has a lot really. They determined that Sgr A* is not a particularly devouring black hole.

Only a small portion of its harbor area makes it indoors. “If Sgr A* was a human, he would eat one grain of rice every million years,” Johnson said. Sgr A* also converts much of the gravitational energy into light.

In fact, in the housing block in the Middle East, resulting in problems in the housing block. This is not the case for Sgr A*, a quieter and more stable type of black hole.


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How do these rough black holes form?

Scientists believe that small black holes formed at the beginning of this universe.

Stellar black holes are formed when the center of a large star collapses on itself and collapses. When this happened, it caused something even greater, a supernova. A supernova is an exploding star, part of which is exploding in space.

Therefore, scientists believe that black holes formed at the beginning of this galaxy.


Frequently Asked Questions


What is inside the black hole?

We see what's going on outside the black hole the closer we get to the event. The event horizon is where the speed of walking exceeds the speed of light: you have to walk faster than light , which cannot happen.

Inside a black hole there is something called a singularity. A singularity is what gets all matter grinded into a black hole.

Some scientists say about it an infinite density point in the center of a black hole, but this can be a common mistake.

this is confirmed by physics, but the so-called singularity will be the place of the collapse of physics, so we should not trust what he always says.


When will a black hole hit earth?

The edge of the Earth near the black hole will be very powerful, stronger than the farthest from it. The fate of the entire planet will be within reach. It will disintegrate.

Everything will appear as it was for a short time. It may be some time before disaster strikes. This will be difficult when the black hole collides with the Earth.


What does a black hole look like nasa?

A black hole is a very dense object. It is in space and does not escape from it. Black holes seem very mysterious and strange objects, which is the main result of how gravity works?

It compresses a lot of mass into the smallest space.


How big are black holes?

The size of black holes varies, some are large and some are small. Scientists believe that the smallest black holes are only the size of one atom.

These black holes are very small but have a large mountain weight. Mass is the amount of matter in an object.

The other type of black hole is called "stellar". It can weigh up to 20 times the mass of the black hole's sun.

There may be many stellar-mass black holes in the Earth's galaxy, called the Milky Way.

The largest black holes are called supermassive. These black holes weigh more than a million suns together.

And scientists discovered scientific evidence that every large galaxy has a supermassive black hole in the center.

The large black hole in the center of the Milky Way is called SagittariusA. Its weight is about 4 million suns. It can be placed inside a very large circle.