At 225 solar masses, the black hole resulting from the merger far exceeds previous record holder GW190521, which weighed in at 140 solar masses. This particular detection originated from a black hole merger that created a new black hole 62 times the mass of our Sun. “Black holes this massive are forbidden through standard stellar evolution models.”To form this black hole, the two black hole predecessors likely had to measure around 100 and 140 times the mass of the Sun, respectively. “One possibility is that the two black holes in this binary formed through earlier mergers of smaller black holes." However, these black holes’ masses aren’t the only mystery, as both were spinning between 80 and 90 percent of their top speed limit.