Schematic representation (IMAGE) National Radio Astronomy Observatory Caption Schematic representation of the most important stages and critical physical mechanisms driving the merger of two supermassive black holes and their corresponding representative time and spatial scales. Credit José Utreras/Ezequiel Treister, Center for Astrophysics and Associated Technologies (CATA); Michael Koss (Eureka Scientific), et al. Usage Restrictions Credit must be given to the creator. Adaptations must be shared under the same terms. License CC BY-SA 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.