... Tonight's Sky . ... Observing . ... Star Atlas . ... Behemoth black hole found in an unlikely place . ... black holes . ... Black hole came from a shredded galaxy . ... The presence of the star cluster suggests that the black hole was once at the core of a now-disintegrated dwarf galaxy. ... Astronomers know how massive stars collapse to form stellar-mass black holes, but itт??s not clear how supermassive black holes, which weigh billions of times the mass of our Sun, form in the cores of galaxies. ...