Jupiter andmoon Europa (IMAGE) University of Gothenburg Caption There are signs of oxygen at Jupiters moon Europa. The ionisation of suphlur dioxide could be the source behind it. Credit Mostphotos 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.