Protoplanetary Disk Animation (VIDEO) National Radio Astronomy Observatory This video is under embargo. Please login to access this video. Caption This is an artist's animation of a protoplanetary disk. Newly formed planets can be seen traveling around the central host star, sweeping their orbits clear of dust and gas. These same ring-link structures were observed recently by ALMA around the young star HL Tau. Credit Credit: National Science Foundation, A. Khan 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.