Protoplanetary Disk (image) University of Arizona Share Print E-Mail Caption This artist's impression shows a young sun-like star encircled by its planet-forming disk of gas and dust. Credit NASA/JPL-Caltech Usage Restrictions This visual may only be used in conjunction with reporting on or posting of this news release. Credit must be given as indicated. Share Print E-Mail 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.