Gravitational waves gave a new black hole a high-speed ‘kick’
Two black holes united into one, which then sped off at around 5 million kilometers per hour
When two black holes spiral around each another before coalescing into one (illustrated), they emit gravitational waves that can give the newly formed black hole a high-speed jolt.
LIGO, Caltech, MIT, Aurore Simonnet/Sonoma State