2 ms·Astronomers Find Two Supermassive Black Holes Spiraling Toward a Collision8 points by wglb 5y agoSenHeng 5y ago> If the team is correct, the diameter of the binary’s orbit is 10 to 100 times smaller than the only other known supermassive binary, and the pair will merge in roughly 10,000 years. /remindme in 10k yearswglb 5y agoI'll stick that in my LongNow Mayan calendar.