Physicists just detected gravitational waves for the second time ever

LIGO/Aurore Simonnet/Sonoma State University
LIGO/Aurore Simonnet/Sonoma State University
It was one of the biggest moments in recent memory when an international team of physicists announced that they’d made the first direct observations of gravitational waves since Einstein first proposed them a century ago. 

BEC CREW | Science Alert

Now, just four months later, an Australian team has announced the second such achievement – they’ve directly detected gravitational waves caused by the collision of two black holes that are up to 14 times the size of our Sun.

„This has cemented the age of gravitational wave astronomy,“ said one of the team, Susan Scott, an astrophysicist from the Australian National University (ANU) in Canberra. „This shows data is going to flow, that will enable us to map a lot more of the Universe than we’ve seen before.“

Scott and her team have been analysing data collected by the two Laser Interferometer Gravitational-Wave Observatory (LIGO) detectors in the US – the same detectors that picked up that historic gravitational wave signal on 14 September 2015, before it was analysed and announced in February.

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