by Michelle Starr, Science Alert
For only the second time, astronomers have picked up a mysterious repeating signal coming from an unknown source in space.
They’re called fast radio bursts. And in less than the blink of an eye, they ping into the data collected by radio telescopes out of nowhere, with as much energy as a hundred million Suns.
Most of them only burst once, never to be heard from again. We don’t know what they are. We can’t track the vast majority.
Only one of these elusive signals had ever been caught repeating, and it was a very big deal, allowing astronomers to trace it to its source for the first time ever – offering a tantalizing line to the phenomenon that causes it.