Lurking 8,000 light years from Earth is a black hole 12 times more massive than our sun. It’s been peacefully sleeping for 26 years. But on June 15, astronomers detected something signaling that it had woken up. Now, scientists around the world are using highly sophisticated instruments to learn as much as they can about this mysterious beast of nature before the black hole returns to its slumber, which will be soon.

Black holes are very dense, massive objects in space that have an immensely powerful gravitational field that traps anything and everything that comes too close, including light. But on occasion they’ll spit out material as well as suck it in. On June 15, one of NASA’s satellites picked up a torrent of x-rays all coming from a single source: the black hole. FULL REPORT