Impact (IMAGE) Southwest Research Institute Caption Prior to the impact of NASA’s Double Asteroid Redirection Test (DART) into the moonlet Didymos, Southwest Research Institute engineers and scientists performed an experiment to study the cratering process that produces the mass of ejected materials, and measure the subsequent momentum enhancement of the impact. SwRI used its large two-stage light gas gun to launch an aluminum sphere at an object representing Didymos at 5.44 kilometers per second. This image shows the moment of impact. Credit Southwest Research Institute Usage Restrictions Images/Videos may be used by the public for educational and informational purposes only. License Original 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.