Illustration of SOHO (IMAGE) NASA/Goddard Space Flight Center Caption A type of wave detected on the Sun by ESA and NASA's Solar and Heliospheric Observatory, or SOHO, reveals that the solar core is rotating about four times faster than the surface. Credit ESA/NASA 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.