X-ray “light echoes” hint at outburst from Milky Way’s central black hole

The supermassive black hole at the center of our galaxy hasn't always been quiet.

https://arstechnica.com/science/2023/06/x-ray-light-echoes-hint-at-outburst-from-milky-ways-central-black-hole/?utm_brand=arstechnica&utm_social-type=owned&utm_source=mastodon&utm_medium=social