While it had been hypothesized in the early 1960s that black holes would be found at the centers of some galaxies, and work in the 1980s identified a number of good black hole candidates, it fell to work conducted with Hubble to show that black holes are probably common to the centers of all galaxies.. 
Olusegun Ososo je oloselu omo ile Naijiria ati gomina ipinle Ondo lati odun 2009 de odun 2017.. 