X-ray image of universe reveals almost 1 million high-energy objects: 'These are mind-blowing numbers' 

 The first eROSITA sky-survey data release involves an X-ray image of half the universe, showing exploding stars and over 700,000 supermassive black holes. It's the largest catalog of high-energy cosmic sources ever. 

https://cdn.mos.cms.futurecdn.net/Be7DKUuihZxrbM7hHaLUPb.png

https://www.space.com/x-ray-astronomy-erosita-half-the-universe-high-energy-objects-black-holes