JWST spectral map of Ganymede (IMAGE) University of California - Berkeley Caption A spectroscopic map of Ganymede derived from JWST measurements shows light absorption around the poles characteristic of the molecule hydrogen peroxide. The circle outlines the surfaces of the moon. Credit Samantha Trumbo, Cornell 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.