https://phys.org/news/2018-10-source-mysterious-fast-radio-home.html > In follow-up research, published today in The Astrophysical Journal Letters, we have taken one of these new detections – known as FRB 171020 (the day the radio waves arrived at Earth: October 20, 2017) – and narrowed down the location to a galaxy close to our own. > This is the closest FRB detected (so far) but we still don't know what causes these mysterious radio bursts that can contain more energy than our Sun produces in decades.