The finding expands researchers’ understanding of just how massive a black hole can be. "We now know that black holes that form from dying stars can be much larger than we had realized," Prestwich says.
( This artist's conception shows the biggest stellar-mass black hole, upper left, which weighs 24 to 33 times as much as the Sun. It is pulling gas from a companion Wolf-Rayet star lower right. Aurore Simonnet/Sonoma State University/NASA.)