Deepest X-ray image to date uncovers a black hole bonanza
 

Believe it or not, that's not a star field you're looking at. Researchers have used NASA's Chandra X-ray Observatory to produce an X-ray image of space (the deepest-ever X-ray, in fact) that has uncovered an abundance of supermassive black holes --...

https://www.engadget.com/2017/01/06/...y-black-holes/