Black hole light echoes

These X-ray emissions appear to be running rings around a black hole located 7,800 light years away in binary system V404

Cygni. Within this system a black hole is stripping its companion star of material, which glows in X-rays and forms a disc around the black hole.

These rings are the product of X-rays from V404 Cygni flares observed in 2015. The X-rays ricocheted off dust clouds between V404 Cygni and Earth, similar to echoes created from sound waves bouncing off surfaces on Earth, creating a series of rings known as light echoes.