So I wonder, where are these giant black holes now? There should be some closer to us than at the edge of the universe, unless something happens to them.
The supermassive black hole in the giant elliptical galaxy M87 is merely ~53 million light years away, close enough that we have now imaged it:
https://en.wikipedia.org/wiki/Messier_87#Supermassive_black_...
The supermassive black hole in the giant elliptical galaxy M87 is merely ~53 million light years away, close enough that we have now imaged it:
https://en.wikipedia.org/wiki/Messier_87#Supermassive_black_...