
A simulation showing a binary blackhole pair (as seen by a nearby observer) spiralling around each other before they merge. Credit: Simulating eXtreme Spacetimes Lensing/Wikimedia Commons, CC BY-SA 4.0
A simulation showing a binary blackhole pair (as seen by a nearby observer) spiralling around each other before they merge. Credit: Simulating eXtreme Spacetimes Lensing/Wikimedia Commons, CC BY-SA 4.0