LIGO found four more pairs of black holes, including the biggest yet

artists impression of merging black holes

When black holes collide they make waves

LIGO/Caltech/MIT/Sonoma State

LIGO keeps on catching waves. The gravitational wave observatory has announced four more detections of the ripples in spacetime, all from pairs of black holes spiraling towards one another and colliding.

According to earlier anouncements by the LIGO team over the last three years, they have already detected gravitational waves from the collisions of one pair of neutron stars, four pairs of binary black holes, and one pair of black holes that we weren’t quite sure about. A new paper published at the end of last week confirms that …