The Milky Way's monster black hole let out a huge blast 200 years ago. We can now listen to its echo (video)
NASA's X-ray observatory detected the echo of a flare likely caused when an object, perhaps a gas cloud or star, was ripped apart by our galaxy's black hole.
TroibNews 
NASA's X-ray observatory detected the echo of a flare likely caused when an object, perhaps a gas cloud or star, was ripped apart by our galaxy's black hole.
