Changing Dust Density and the Growth of Structure in this Simulated Debris Disk (video) NASA/Goddard Space Flight Center Share Print E-Mail Loading video... Caption Watch the changing dust density and the growth of structure in this simulated debris disk, which extends about 100 times farther from its star than Earth's orbit around the sun. At left, the disk is seen from a 24-degree angle; at right, it's face-on. Lighter colors show higher dust density. Credit NASA Goddard/W. Lyra (JPL-Caltech), M. Kuchner (Goddard) Usage Restrictions None 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.