AZURE Vapor Tracers (IMAGE) NASA/Goddard Space Flight Center Caption Colorful clouds formed by the release of vapors from the two AZURE rockets allow scientist to measure auroral winds. Credit NASA/Lee Wingfield 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.