image-1_1024x728 (IMAGE) SETI Institute Caption JWST three-color images of Cassiopeia A, contrasting Carbon Monoxide (CO in green) and Argon ejecta (in red) and synchrotron emission (in blue). The images show that there is more CO gas in the outer layers than argon gas, which means CO molecules are forming again after the reverse shock. Credit SETI Institute Usage Restrictions none 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.