What is a Black Hole?

Black holes grow in size by absorbing any dust particles and gas from the galaxy near them.

A black hole is a name given to a region in the universe with very strong gravitational pull, making it impossible for any matter to leave the site. The wonders of the black hole are that even light and the tiniest object cannot exit its grasp. This is referred to as “position of no return – event horizontal.” The black hole is characterized by the ability to squeeze together matter within the confines of a very tiny space. They are also not visible since they are luminous. A black hole has infinite density. In 1916, one of the brightest astronomers, Albert Einstein, foresaw discovery of such holes though he was not able to clearly explain them in the “general theory of relativity.” The prediction was confirmed in 1971 by John Wheeler, an Astronomer from the US who discovered the first black hole.

Types of Black Holes

Astronomers have been able to identify and classify the black holes by their masses as stellar, supermassive, and intermediate black holes. The Stellar black holes are small in size despite holding very high density, having been compressed from a large object in the space. They are formed after combustion of a huge star which is three times the size of the Earth. The remnants compress further to form the stellar black hole. Because of this process, the end product exerts very high gravity hence pulls any object near it. They grow in size by absorbing any dust particles and gas from the galaxy near them. On the other hand, a Supermassive black hole is the hugest and densest. The giant of all the holes can be millions or billions times bigger than the sun. They are such enormous because of their great gravity that pulls matter to them from long distances. The third type is the intermediate black hole. These are moderate in size and of average density.

Parts of a Black Hole

The black hole is made up of two parts, the event horizon and the singularity. The horizon is the outer part of the hole. When the gravity pulls objects towards the hole, such objects are distributed across the length of the horizon such that an outsider cannot see them anymore. The singularity is located in the middle of the hole. This area is known to have unending density where any object is crushed by “spaghettification” then added to the existing mass in the hole whose density is infinite.

Evidence That Black Boles Actually Exist

Even if the holes are black, and thus invisible, scientists are able to tell that they exist by observing how the gravitational pull from these objects affects the gases, stars, and other objects around it. Now that the black hole has no surface, the gravity enables it to concentrate huge matter in a small area. Some holes are surrounded by spherical materials which circle around them emitting X rays which the astronomers are able to study using telescopes and satellites.

Destroying the Black Hole

Black holes will be there forever since the only way to destroy it is by merging it with another hole. This will just combine the two into one stellar hole. On the other hand, the hole cannot harm the Earth because of the enormous distance between the two. Black holes cannot destroy the earth since their gravitational pull does not reach the solar system.


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