July 30, 2020, ainerd
Once you go black, you’ll never go back – black holes
(Schwarzschild Radius Formula)
A black hole is a space in which nothing, not even light, can escape because it can escape the gravitational pull of its host.
Black holes are among the densest objects in the universe, giving them the same gravitational pull as the most massive stars in our galaxy, the Milky Way. In some cases they are the remains of a former massive star that was crushed to extreme density in a supernova explosion, and in others they contain the mass of millions or billions of stars.
Black holes can be up to 1,000 times the mass of the Sun or just a few hundred million light years away.
How powerful a black hole is depends on how much mass it contains, but with mere gravity, it can tear entire planets and stars apart. Other differentiating information about black holes is considered hairs and is likely to disappear at the edge of the black hole, where nothing, including light, can escape. Watch the video above to learn how big a black hole can become, from a supermassive black hole at the center of M87 to a smaller one just a few hundred million light years away.
When the famous physicist Stephen Hawking suggested that black holes actually have an opulent hairdo of ghostly zero-energy particles – a collection of deer that contains all the material they consume – he broke through the fog of scientific debate to the heart of the black hole theory. The hypothesis is not proven, but it could help solve the mystery of what happens to gas and dust that fall into a black hole.
Black holes are regions of space where gravity is so strong that nothing, not even light, can escape. Nothing should escape the strong gravitational grip of a black hole because it is subject to its own gravitational pull.
The existence of such objects has been suggested by a number of studies, such as the discovery of black holes in the Milky Way and the formation of supermassive black holes.
Black holes are one of the most interesting pathologies of space – time supplied by Einstein’s general theory of relativity. However, it is the work of Albert Einstein and his colleague Karl Schwarzschild who basically developed the modern idea of black holes. With the help of his general theories of relativity, he discovered that matter compressed to a point known today as singularity would be enclosed by a spherical region in space from which nothing could escape.
It is a region of space where the gravitational pull is so strong that nothing, not even light, can escape. It occurs when matter collapses gravitationally around itself or a massive star burns up. This depends on the fact that this potentially catastrophic instability is merely in the mass of matter that is attracted to the masses and the closer they are, the closer they get.
While objects can orbit massive stars without falling, this is not true of black holes, and it is mass that determines the force of gravity of a black hole. Black holes have infinite mass and are extreme in many ways, but they do not have as much gravitational pull as a very massive star. Known as stellar black holes, these black holes have a much higher mass than very massive stars, about ten times that of the Sun.
Black holes are strange regions where gravity is so strong that it bends light and deforms space. If you are close enough, gravity will lead you to the center of the black hole, and it has a gravitational effect that is similar to that of a very massive star, but much stronger.
The event horizon of a black hole is the boundary at which nothing can escape, not even light. It is known as the only point in space – the time when the entire mass of black holes is concentrated. The rotating black hole creates a region called the ergosphere, so light cannot escape from this boundary or the mouth.
If an object falls into the ergosphere, even if a part of it falls into the black hole, the part that has escaped gains energy. This energy is sent back to the light of the object emitted by the rotating black holes.
In 1971, Russian physicist Yakov Zeldovich translated into other rotating systems that could be tested on Earth.
The accretion disk can spin at a significant percentage of the speed of light, and the friction between the colliding particles in the disk can raise its temperature to millions of degrees and emit huge amounts of X-rays – radiation that can be detected with special telescopes. In April 2019, the Event Horizon Telescope project revealed the first direct observation of a black hole with a rotating disk. Although this amazing achievement undoubtedly proves that black holes exist, it also allowed us to directly test the theory of black hole formation and its effects on our own solar system, and marked the birth of new branches of observational astronomy.