Calibrating a Cosmic Clock (IMAGE) American Physical Society Caption This diagram is a sketch of the experimental region of a time-of-flight experiment to measure processes that affect the abundance of osmium-187. The information will give scientists a better idea of the age of the galaxy. Credit M. Mosconi et al., Phys. Rev. C 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.