FRB - 121102

There have been roughly 30 fast radio bursters (FRBs) detected so far, but FRB 121102 is the only one that has erupted more than once. Repetition is a boon for those trying to unravel the nature of these mysterious objects. It offers the chance to look again with different instruments, and in particular with telescope arrays that can pinpoint the bursters’ position on the sky. Thanks to FRB 121102’s persistent hiccups (it’s been observed to flash more than 150 times), we now know that its source lies in a small galaxy 3 billion light-years away.