Nothing, not even light, can escape a black hole. Black holes are defined as cosmic bodies with extraordinarily tremendous gravity. The death of a big star can result in the formation of a black hole. When a star reaches the end of its life and has depleted its internal thermonuclear fuels, the core becomes unstable and gravitationally collapses inward on itself, causing the star’s outer layers to be blown away. The dying star is compressed to a point of zero volume and infinite density termed as singularity by the crushing weight of constituent matter falling inside from all directions.
Because of their small size and the fact that they emit no light, black holes are difficult to detect firsthand. However, the effects of their massive gravitational fields on neighboring stuff can be used to observe them. If a black hole is part of a binary star system, stuff flowing into it from its companion becomes intensely heated and then emits abundant X-rays before entering the black hole’s event horizon and disappearing forever. A black hole is one of the stars in the binary X-ray system Cygnus X-1. Non-stellar origins are thought to exist in some black holes. Large amounts of interstellar gas are thought to accumulate and collapse into supermassive black holes at the centers of quasars and galaxies, according to several researchers. The energy produced by a mass of gas falling rapidly into a black hole is believed to be more than 100 times that released by the same amount of mass by nuclear fusion. As a result, the huge energy output of quasars and certain galaxy systems could be explained by the gravitational collapse of millions or billions of solar masses of interstellar gas into a large black hole.
Sagittarius A, a supermassive black hole at the center of the Milky Way Galaxy, is one such example. Observations of stars around the position of Sagittarius A reveal the existence of a black hole with a mass of almost 4,000,000 Suns.
What are black holes?
A black hole is a region of space in which gravity is so strong that even light cannot escape. Because matter has been squeezed into such a small space, gravity is extremely powerful. When a star is dying, this can happen. People cannot see black holes because no light can escape. They are undetectable. Space telescopes equipped with specialized tools can aid in the discovery of black holes.
Some of the oddest and most fascinating objects in space are black holes. They’re extraordinarily dense and black hole gravity don’t allow even light to go out. If you went into a black hole, gravity would stretch you out like spaghetti, however you would die before reaching the singularity, according to theory. However, another research revealed that quantum processes might lead the event horizon to behave similarly to a wall of fire, swiftly burning you to death. Suction occurs when something is drawn into a vacuum, which the huge black hole is not. Cygnus X-1 was the first object to be classified as a black hole. A star can be split apart if it passes too close to a black hole. It is estimated that the Milky Way contains anywhere from 10 million to 1 billion stellar black holes, each with a mass around three times that of the sun.
How black holes are formed?
The smallest black holes, according to scientists, formed when the universe began. When the core of a massive star collapses, it creates a stellar black hole. When this happens, a supernova occurs. A supernova is a star that explodes and releases a portion of its mass into space. Lastly, supermassive black holes form simultaneously with the galaxy in which they reside.
How Big are Black Holes?
Black holes can be very large or very small. The smallest black hole, according to scientists, is as small as one atom. They are really small, but they have the mass of a mountain. Stellar black hole is a different type of black hole. Their mass can be as much as 20 times that of the sun. In our galaxy, there could be a large number of star mass black holes. The largest black holes are known as supermassive black holes. These black holes have a combined mass of more than a million suns. Scientists have discovered evidence that at the heart of every large galaxy, there is a supermassive black hole. Sagittarius A is the name of the supermassive black hole in the center of the Milky Way galaxy.
Types of black holes
- Stellar black hole
- Intermediate black hole
- Supermassive black hole
Stellar black holes
When a star reaches the end of its fuel supply, it may collapse or fall into itself. The new core of smaller stars will become a neutron star or a white dwarf. When a larger star collapses, however, the star continues to compress, forming a stellar black hole. Individual stars collapse into black hole, which are relatively small yet extremely dense.
One of these objects has more than three times the mass of the sun packed inside a city’s circumference. This causes a tremendous amount of gravitational force to be exerted on items in the vicinity of the object. The dust and gas from their surrounding galaxies is subsequently consumed by stellar black holes, causing them to expand in size. According to a research, our galaxy Milky Way includes a few hundred million stellar black holes.
Intermediate black hole
Scientists believe that a black hole is only in two sizes: tiny and huge, but new study suggests that midsize, or intermediate, black holes may occur. When stars in a cluster collide in a chain reaction, such things could arise. Several of these intermediate black holes growing in the same area could eventually collide in the galaxy’s center, generating a supermassive black hole. An intermediate-mass black hole has been discovered in the arm of a spiral galaxy in 2014.
In the center of dwarf galaxies, such black holes may occur. X-ray activity, which is typical in a black hole, was detected in ten such galaxies, indicating the presence of black holes with masses ranging from 36,000 to 316,000 solar masses. The data came from the Sloan Digital Sky Survey, which looks at over a million galaxies and can identify the type of light that is commonly seen originating from black holes picking up nearby debris.
Supermassive black hole
Small black hole abound in the universe, while supermassive black hole rule. These gigantic black hole is millions or billions of times as big as the sun, but have a diameter of around the same size. Black hole is assumed to exist at the heart of almost every galaxy, including our own Milky Way. Once born, these giants collect mass from the dust and gas that surrounds them, which is abundant in the center of galaxies, allowing them to grow even larger.
Hundreds or thousands of small black holes may join together to form supermassive black hole. Large gas clouds, crushing together and rapidly accumulating mass, could also be to blame. A third possibility is the collapse of a stellar cluster, which is a collection of stars that all collide at the same time. Fourth, enormous groupings of dark matter could produce supermassive black holes. We can see dark matter because of its gravitational impact on other objects; however, we don’t know what it’s made of because it doesn’t radiate light and can’t be detected directly.
What do black holes look like?
The outer and inner event horizons, as well as the singularity, are the three “layers” of a black hole. The event horizon of a black hole is the border that surrounds the black hole’s mouth and beyond which no light can escape. A particle cannot escape the event horizon once it has crossed it. Across the event horizon, gravity remains constant.
The singularity is a point where the black hole’s mass is concentrated. It is the inner area of a black hole, where the object’s mass is concentrated. Scientists are unable to observe black hole in the same way that they can see stars and other celestial objects. Astronomers must instead rely on detecting the radiation that black hole generate as dust and gas are pulled into the dense entities. However, supermassive black hole in the center of galaxies may be covered by the thick dust and gas that surrounds them, obscuring the telltale emissions.
When matter is dragged toward a black hole, it can ricochet off the event horizon and be thrown outward instead of being drawn into the mouth. The material is accelerated to near-relativistic speeds, resulting in bright jets of material. Despite the fact that the black hole is invisible, these powerful jets may be observed from considerable distances.
Could a Black Hole Destroy Earth?
Black holes do not eat stars, moons, or planets as they travel across space. Earth will not be consumed by a black hole because no black hole is close enough to the solar system for Earth to do that. Even if a black hole with the same mass as the sun replaced the sun, the Earth would not fall into it. The gravity of the black hole would be the same as that of the sun. Earth and the other planets would orbit the black hole in the same way that they currently orbit the sun.
It is impossible for the sun to become a black hole. A black hole cannot be formed by the sun since it is not a large enough star.