Black holes are some of the most massive objects in our known universe, which pull in anything that gets too close, including light. When two merge, they produce an incredibly subtle signature — the gravitational wave — which warps space-time. This is also the furthest gravitational wave detected, with the others roughly 1.4 billion light years away. "This indicates that there's quite a variety in the type of black holes that emit gravitational waves that are colliding with each other." Einstein said that this could not happen in gravitational waves as they make their way towards Earth.

Source: CBC News June 01, 2017 15:33 UTC