Black holes have been a matter of curiosity for both the ordinary people. For familiar people, it is like a material-eating Devil swallowing from matter to light. At the same time, it is such a body for scientists that it is challenging to know about, and all the information can be obtained only from its surrounding area and other indirect methods. Blackholes can also answer unresolved questions about the Universe and Space. The works for which the Nobel Prize in Physics was given last year were related to black holes.
From the information found so far about Black Hole, it is considered a dangerous body. There are three reasons for this. First, falling into a black hole would destroy everything, even humans. Apart from this, there are huge black holes in the center of all galaxies, whose appetite is very high. Another reason is that black holes do not have laws of physics. It is not yet known what laws are there inside them.
Supermassive black holes found in the centre of galaxies are inactive most of the time, but when they are active, they appear to swallow stars and gas, and the area near the black hole fades from its brightness to the Galaxy. So far, a lot has been known about black holes in the last several decades, but many of its secrets are not yet open. They are born after the death of giant stars. Due to the exhaustion of nuclear fuel, the star’s core is compressed into such a dense material that protons, neutrons, and electrons are no longer separate particles.
Black holes are recognized when they orbit a normal star. Astronomers know the characteristics of Black only from its companion star. The first black hole confirmed was Cygnus X-1, the brightest source in the Cygnus constellation. Since then, about 50 black holes have been discovered in this system. There are expected to be about 10 million black holes in our Milky Way Galaxy itself. A black hole is called the tomb of the grave. Famous scientist Stephen Hawking has told in his book A Brief History of Time how the massive gravity of a black hole can swallow the parts of the human body and then its molecules separately.
Over the past thirty years, the Hubble Telescope has shown that all galaxies have a black hole at their centre. These massive black holes are called supermassive black holes. More giant galaxies have larger blacks. Supermassive black holes are found in the universe billions of times more massive than black holes of some mass more significant than the Sun.
This difference is like an apple and Giza’s pyramid. Astronomers have only obtained a picture of a black hole last year, which is the event horizon. This 7 billion solar mass is in the centre of the elliptical galaxy M87. The discoverers have won in the previous year’s Nobel Prize for a black hole that is about a thousand times larger than our Galaxy’s black hole.
Usually, black holes are visible only when immersed in darkness. But when their gravity begins to swallow nearby stars and gas, they emit intense and bright radiation. Supermassive black holes are dangerous for two reasons, if you go too close to them, the extreme gravity will pull you in. But if at that time the black hole becomes active and is in the quasar phase, then your high-energy radiation will explode in you. When a black hole turns into a quasar, it becomes the brightest object in the universe.
The most giant black hole ever discovered is 40 billion times more massive than the Sun. Where the outer planets of the solar system revolve around the Sun for about 250 years. The black hole completes its own rotation of the same distance in three months. Its outer edge rotates at half the speed of light. At the centre of a black hole is the singularity point where the density of matter becomes infinite, and all laws of physics fail. According to Steven Hawking, Black will be the last thing to survive at the end of this universe. That is, these scary bodies are immortal in a way.