Black Hole Cygnus X-1 is a double-star system (really, the majority of black holes are found as such systems, literally one collapsed star cannibalizing the other). I have a link to Space.com and a video embed from You Tube at the link above.
The term "black hole" was coined by John A. Wheeler, while a professor at the University of Texas at Austin. Read more on Dr. Wheeler in this NY Times article on his epitaph.
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