B4SSF4C3 t1_je74lnf wrote on March 29, 2023 at 9:58 PM

Reply to comment by DoyoureadmeHAL in Ultramassive black hole over 30 billion times mass of our sun has been spotted. The discovery had been made possible thanks to a phenomenon known as gravitational lensing — the first time a black hole has been spotted in such a way. by Wagamaga

Right, size has no meaning we can relate to. Space time collapsed to a singularity. They very much mean mass.

Although now that I think about it, not sure if mass has meaning either at that point? Is it “mass equivalent” effect on surrounding space time?

FrickinLazerBeams t1_je7epth wrote on March 29, 2023 at 11:13 PM

No. Black holes have a size. A black hole with 30 billion solar masses has a radius of a little less than 600 AU (Astronomical Units, the average distance from the earth to the sun).