STARS (IMAGE) DOE/Pacific Northwest National Laboratory Caption STARS -- the Solar Thermochemical Advanced Reactor System -- converts a record-setting 70 percent of solar energy into chemical energy. Credit PNNL 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.