New powers of observation (IMAGE) University of Tokyo Caption The WINERED instrument allows observations of distant quasars from when the universe was only 2.4 billion years old. Previous studies with visible light were limited to astronomical bodies 4 billion years old. The colored lines represent three different possible models for the chemical evolution of the universe. Credit © 2020 Sameshima et al. 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.