To announce their arrival, black holes give off a birth cry—an energetic flash of light known as a gamma-ray burst. Now, astronomers have evidence that just minutes later, the newborns emit powerful X-ray burps as well.
To announce their arrival, black holes give off a birth cry—an energetic flash of light known as a gamma-ray burst. Now, astronomers have evidence that just minutes later, the newborns emit powerful X-ray burps as well.