Astronomers have discovered a supermassive black hole-powered quasar that may have helped "turn on the lights" in the early universe
The intense brightening and dimming of this quasar was observed by NASA's NuSTAR (Nuclear Spectroscopic Telescope ARray) X-ray space telescope. NuSTAR's observations were then matched up with data about the same feeding supermassive black hole from NASA's Chandra X-ray space telescope.
