The black hole can be classified into four categories based on its mass;
Stellar, Intermediate, Supermassive, Miniature.
The most common cause of black hole formation is stellar death.
When the stars reach the end of their lives, most of them multiply and lose mass and become cold white dwarfs. But the largest of these flammable objects are galaxies 10 to 20 times larger than our Sun, called super-density neutron stars or stellar-mass black holes.
The so-called youngest members of the black hole family are theoretically only considered.
These small hurricanes of darkness are thought to have formed as soon as the universe formed with the Big Bang about 13.7 billion years ago. These are black holes known as miniature.
• The second type is super mass. Supermassive black holes, predicted by Einstein’s general theory of relativity, have masses equal to billions of suns; The location of these giants in the universe is at the center of most galaxies. Sagittarius A * is a supermassive black hole thought to be located in the center of our Milky Way.
Intermediate black holes are about 100 to 100 million times the mass of the Sun.