The two so-called GW190521 black holes, one 66 times the mass of the Sun, the other 85 times the mass, merged to form the new massive black hole, the first time such large black holes have been observed either by gravity or by electromagnetic observations.
Named by the Polish astronomers who found them, the planets could be just two of millions floating through the galaxy. So far, though, scientists have only managed to locate a dozen or so rogues, which is why adding these two to the bunch is deemed important.
Prof. Andrzej Udalski from the Warsaw University Observatory has been awarded the prestigious Karl Schwarzschild Medal of the German Astronomical Society (Astronomische Gesellschaft).
The first rule for dealing with black holes is don’t get too close. That’s not stopping black hole astronomers in Poland and Lithuania though.