Brightness Plot (IMAGE) University of Arizona Caption A plot comparing the brightness (on the y-axis) to the color (on the x-axis) of 250-million year-old stars in the Wild Duck Cluster. The blue dots indicate individual stars. The bluest stars are on the left side, and the reddest stars are on the right side. The red line indicates the path across this plot that stars take over the course of their lifetime. Credit Beomdu Lim Usage Restrictions This visual may only be used in conjunction with reporting on or posting of this news release. Credit must be given as indicated. 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.