Summary: According to a paper published this past week in the journal Nature Astronomy, scientists found what could be the brightest known object in the universe: a quasar produced by a massive and voracious black hole. It's estimated to be emitting light that's 500 trillion times more intense than Earth's sun. John Yang has more. PBS NewsHour is supported by - https://www.pbs.org/newshour/about/funders
