Protoplanetary disk (IMAGE) University of Arizona Caption This artist's illustration depicts how the gas leaving the nascent planet-forming disk might look. Such gas dispersal can also happen around supermassive black holes, however, the physics may not be the same as those discussed here. Credit ESO/M. Kornmesser Usage Restrictions Credit must be given to the creator. License CC BY 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.