But guys originally it is said that in 1967 the American scientist or American Astronomo John Willer discovered the black holes. He gave the pure theoretical concept an actual term the black holes to our black holes. Before that these black holes are named as some unwanted particles, some unwanted or some extranatural things. Some of the theories at that time declare that he can do trouble with the help of these black holes. This question I will give you the answer in the next order. Thanks for listening today