Old Star Illustration (IMAGE) Center for Astrophysics | Harvard & Smithsonian Caption It's harder to tell the age of an older star because they rotate more slowly and have smaller starspots. Credit David A. Aguilar (CfA) 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.