RIT Density Contours (VIDEO) Rochester Institute of Technology This video is under embargo. Please login to access this video. Caption Two supermassive black holes at the center of a large gas disk are on a collision course in a time sequence simulated by RIT scientists. An alternating flow of gas fills and depletes mini disks feeding the black holes, shown above. Characteristic light signals emitted in the gas could mark the location of the invisible masses. (Note: The dot at the center of the image is not part of the simulation.) Credit RIT Center for Computational Relativity and Gravitation Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.