Scientists detect an 'impossible' black hole. Here's what that means.
Astronomers from the LIGO and Virgo scientific collaboration have detected a mind-blowing gravitational shockwave. It originated from the biggest merger yet observed between two black holes.
The signal traveled seven billion years to reach Earth but was still strong enough to be detected.
Nuala speaks with senior OzGrav Investigator, Professor Susan Scott FAA, to understand what took place.