John Gizis, University of Delaware (IMAGE) University of Delaware Caption John Gizis, a professor at the University of Delaware, has discovered an "ultracool" brown dwarf star that can generate flares stronger than the sun's. Credit Evan Krape/University of Delaware Usage Restrictions Image must include credit to University of Delaware. 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.