gravitational waves

Now envision a typical triple system, where an inner pair of binary stars is orbited by a third star farther out. Once all three of these stars become black holes — provided they are massive enough — you have triple black hole system.…

Yet with a sample size of one, such assertions could only be educated guesses, says Carl Rodriguez, an astrophysicist at Carnegie Mellon University.Now data from LIGO’s latest catalog show that black-hole binaries are far less common…