For the first time, scientists have seen an unusual light signal from a distant quasar repeating itself. These signals, according to the scientists, are in indication to the last stages of a merger between two supermassive black holes. The discovery findings are published in the journal Nature.
The researchers say that mergers indicate critical steps in the formation and evolution of large galaxies and the supermassive black holes which lie at the centers. Furthermore, they also have significance in regulating the creation of star in a galaxy.