Ganymede (IMAGE) University of Hawaii at Manoa Caption Ganymede, the largest moon in the entire solar system. Credit NASA, JPL-Caltech, SwRI, MSSS, Kalleheikki Kannisto © CC BY Usage Restrictions Credit must be given to the creator. License CC BY 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.