Strata-1 (IMAGE) NASA/Johnson Space Center Caption A view of the contents of two of Strata-1's tubes. The regolith simulant on the left is a simplified model consisting of angular fragments of colored glass, sorted into three sizes. The tube on the right contains pulverized meteorite material to closely resemble the actual regolith on a small asteroid, also sorted into three sizes. Credit NASA 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.