A supermassive black hole is orbiting an even more massive one, periodically crashing through its accretion disk. The two supermassive black holes may be on the brink of collision, although the timing of such an event is uncertain, with some reports suggesting it could occur in as little as 100 years. The behavior of these black holes and their surrounding environments is being studied, with observations of stars and gas clouds in their vicinity providing insight into their dynamics.