How they are created, They are created from the deaths of high mass stars. these stars have approximately be 3 times the mass of the sun to form as black hole. The core of theses stars collapse on themselves.
What are they, Black Holes are places in space where gravity is so intense that not even light can escape.
Where are they, They are everywhere the only problem is because no light can escape they are invisible. They can only be spotted with special telescopes. Also with special tools you can see how stars near black holes are different then stars away from them.
Created with images by NASA Goddard Photo and Video - "Large Hubble Survey Confirms Link between Mergers and Supermassive Black Holes with Relativistic Jets" • WikiImages - "cassiopeia a cas a supernova rest"
