Black holes are invisible in the space having a intense gravity that pulls up any thing that comes near it. It doesn't leaves light and pulls up it too inside. Thus, blackholes are invisible due to insufficient amount of light. Certain space equipment and telescopes helps to see black holes. Black holes are formed when massive stars, explode, die or collapses inward and the star's outer layers are blown away. Some scientists believed that small black holes are formed while the universe began and supermassive black holes are made during the formation of galaxies.
What are the four types of Black Holes?
Black holes can be enormous as well tiny. They vary upon their sizes. The four types of black holes are : stellar, intermediate, supermassive and miniature. The stellar-class of black hole forms about 10 solar masses. A single star can't form such a bulky Intermediate black hole. It weighs 142 times the mass of the sun. A supermassive black hole is the largest black hole and equals 4 million suns. Miniature black holes, also known as mini black holes are the smallest. Approximately, they can have a mass of five to six times a sun. They are like atoms.
Einstein rejected the formation of Black holes?
Several times, he denied the formation of black holes. In 1916, Karl Schwarzschild who was a German physicist showed to Einstein that black holes indeed form. This work created a term - Schwarzschild radius referred as gravitational radius. In spite of that, However, scientists wondered about this possibility. In the 18th century, John Michell mentioned this idea in the report to Royal Society of London in 1783. But, the phrase, 'Black hole' was only first used in 1967, by John Wheeler, a American physicist. Who is known as the father of black holes? John Wheeler, known as the 'Father of Black holes'. He coined the term 'Black hole' He died Sunday in Hightstown, N.J., at the age of 96.
Quick Facts :
=> Black holes evaporate over time.
=> There is a black hole in the centre of our Milky-Way Galaxy.
=> Black holes would have the same gravity as the sun. But, Unlike the star, the sun is not huge enough to be a black hole.
