What is Black Hole?
The universe is the term that describes the all matter exists in the space. It comprises millions of millions of stars and planets and numerous cloud of gases, which separated by the massive empty space. Black holes are one of the most interesting objects in the Universe. Before moving on to the discussion, firstly know that- What is dark matter in Space?
“Dark matter in Space is a hypothetical form of matter that is thought to account for approximately 85% of the matter in the universe and about a quarter of its total energy density.”
What is Black Hole?
Black Hole is a region of space resulting from the collapse of a star; extremely high gravitational field. It exerts the same the gravitational force on something far away from it as any other celestial body of the same mass would. In other words, it is empty space with great or massive gravitational field. For Example- if Sun is disintegrated into smaller pieces, then the other celestial bodies like Earth remain in its same orbit.
Formation of Black Hole
According to the Cosmologists, the black hole was formed from the collapse and compaction under gravity, of a star of mass greater than three times that of the Sun, at the end of its life-cycle. The density of the black holes is so great or denser that nothing, not even light can escape from its gravity.
The idea of such a massive empty space from which nothing can escape, was given by the English clergyman John Michell in November 1784. In 1916, Albert Einstein in his general theory of relativity first predicted the black holes. But the term 'Black Hole' was coined by the American astronomer John Wheeler in 1967.
The Indian Physicist S. Chandrasekhar had predicted an upper limit to the mass of star, above which they either explode or form a black hole. This is referred to as the ‘Chandrasekhar Limit’.
Types of Black Holes
There are three types of black holes which are discussed below:
1. Stellar black holes: According to the astronomer's, this types of black holes are formed by the compression of the collapse of the larger star.
2. Supermassive black holes: According to the astronomer's, this types of black holes are formed by the merger of the hundreds or thousands of tiny black holes through the ongoing gravitational collapse which resultant the spheroid region of space from which nothing can escape.
3. Intermediate black holes: According to the astronomer's, black holes which are more bigger than Stellar Black holes but less than supermassive black holes is called intermediate black holes.
Black Hole and Event Horizon Telescope
The Event Horizon Telescope is a planet-scale array of eight ground-based radio telescopes built with the help of international collaboration to capture images of a black hole. Recently, this telescope captured the image of the supermassive black hole and its shadow. This captured image revolutionary’s the study of Astrophysics because it captures the image of that object from which nothing can escape not even light.