Flashback! Milky Way's Supermassive Black Hole Caught Eating..Something

A black hole, a million times more massive than the Sun, fired off a high energy x-ray burst detected by NASA's NuStar mission on its first observing campaign. Unidentified matter superheated to around 100,000,000° celsius emitted these hard x-rays. See NuStar's first black hole photo: https://www.space.com/16411-black-hole-photo-nasa-telescope.html Credit: NASA