Cosmic vibrations sensed from unusual star merger bbc.com

Laser labs pick up a signal emanating from the collision of two dense, dead stars.
It's the second time the international Ligo-Virgo collaboration of laser labs has picked up such a signal.

What makes this one different, though, is the combined mass of the two merging neutron stars – at three and a half times that of our Sun.

A coalescing system this big has never been seen before in our galaxy and challenges researchers' expectations.