Mysterious radio signals from space have been known to repeat, but for the first time, researchers have noticed a pattern in a series of bursts coming from a single source half a billion light-years from Earth.
Fast radio bursts, or FRBs, are millisecond-long bursts of radio waves in space. Individual radio bursts emit once and don't repeat. But repeating fast radio bursts are known to send out short, energetic radio waves multiple times. And usually when they repeat, it's sporadic or in a cluster, according to previous observations.
FRB 180916 was traced to one of the spiral arms of a Milky Way-esque galaxy. It was also within a star-forming region of the arm, the researchers said.Now, the evidence of a pattern in the signal adds to the question of what could cause these bursts to emit the way that they do. "The discovery of a 16.35-day periodicity in a repeating FRB source is an important clue to the nature of this object," the researchers wrote in their study.
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