Sun Harmonics (IMAGE) New York University Caption An artistic impression of the high-frequency retrograde (HFR) vorticity waves. These waves appear as swirling motions near the equator of the Sun. The rotation in the north is always anti-symmetric to the rotation in the southern hemisphere. These mysterious waves move in the opposite direction to the sun's rotation, which is to the right, three times faster then what is allowed by hydrodynamics alone. Credit NYU Abu Dhabi Usage Restrictions N/A License Original 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.