A star and its electric field (IMAGE) University of Iowa Caption University of Iowa physicists have gained new insights about the sun's electric field. The researchers measured electrons streaming from the sun, a main constituent of the solar wind, to determine the boundary in energy between electrons that escape the sun's clutches and those that don't. Credit Jasper Halekas lab, University of Iowa 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.