This is (in my opinion) one of the single biggest achievements of humanity.

Image of Sagittarius A* black hole at center of our Galaxy, taken by Event Horizon Telescope team. This one is also refined with magnetic field lines.

I don't remember what was the exact source for me, but one of the possible ones is https://s3.amazonaws.com/cms.ipressroom.com/173/files/20247/66c7d3d62cfac2492a9bdd54_Sagittarius+A/Sagittarius+A_hero.jpg. I just made it grayscale, some dimming, and resizing, to not cover whole of screen.