A fast radio burst, or a strong pulse of energy, was tracked to a distant long-dead galaxy that astronomers never thought could produce such a signal.

Astronomers have traced two mysterious fast radio bursts from space to wildly different places, which suggests the phenomenon may originate in diverse ways.

Astronomer Calvin Leung was excited last summer to crunch data from a newly commissioned radio telescope to precisely pinpoint the origin of repeated bursts of intense radio waves—so-called fast radio bursts (FRBs)—emanating from somewhere in the northern constellation Ursa Minor.

In a twist that’s got the astronomy world buzzing, scientists have picked up fast-repeating radio signals coming from a galaxy once thought to be out of action. Called Fast Radio Bursts (FRBs), these quick blips last just milliseconds but pack as much energy in that tiny moment as our sun does in a whole day.