JOKARUS Payload (IMAGE) Forschungsverbund Berlin Caption Used to demonstrate the first optical frequency standard based on molecular iodine in space. Credit HU Berlin/Franz Gutsch Usage Restrictions The image may only be used with appropriate caption or credit. 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.