AIRS Image of Irwin (IMAGE) NASA/Goddard Space Flight Center Caption This infrared image of Tropical Depression Irwin was taken Aug. 1 at 6:23 a.m. EDT (10:23 UTC) by NASA's Aqua satellite. The tiny blue area indicates the coldest cloud tops. Northwest of Irwin are the remnants of former tropical storm Hilary. Credit Credits: NASA JPL, Ed Olsen 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.