SDSS J1254+0846, are powered by material falling onto supermassive black holes. This pair of quasars was first detected by the Sloan Digital Sky Survey, a large-scale astronomical survey of galaxies and quasars. They were observed with the Magellan telescope to determine whether the quasars were close enough to show clear signs of interactions between their host galaxies. "The tidal tails fanning out from the galaxies that we see in the optical image are a sure sign, the litmus test of an ongoing galaxy merger," said Green. This result represents strong evidence for the prediction that a pair of quasars would be triggered during a merger. The galaxy disks both appear to be nearly face-on to Earth, which may explain why the X-rays from Chandra show no signs of absorption by intervening gas or dust. Release date February 3, 2010.