FELT (IMAGE) University of Notre Dame Caption The FELT, captured in 2015, rose in brightness over just 2.2 days and faded completely within 10 days. Credit NASA/JPL-Caltech 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.