Very-high-energy Gamma Rays (IMAGE) Iowa State University Caption This is an X-ray image of the Crab Nebula and pulsar. Credit Image courtesy of the Chandra X-ray Observatory, NASA/CXC/SAO/F. Seward. 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.