An international team of scientists has captured the highest-resolution images of the Sun’s surface ever obtained, revealing small, swirling patterns linked to a phenomenon known as Kelvin-Helmholtz instability (KHI). The discovery was announced by the U.S. National Science Foundation’s National Solar Observatory (NSF NSO) on August 5, 2026, with the findings published in Nature.
The Kelvin-Helmholtz instability on the Sun was observed using the NSF Daniel K. Inouye Solar Telescope in Maui, Hawaii. The images showed small whirlpool-like swirls forming around the edges of magnetic regions on the solar surface. Scientists say the observations provide the first direct experimental confirmation of a phenomenon, previously predicted by theory.
KHI occurs when two layers of fluid or gas move past each other at different speeds. This difference creates shear that develops into wave-like patterns and spiraling vortices. Similar effects can be seen in ocean waves, wind-driven clouds, and planetary atmospheres.
Scientists believe that these swirls on the Sun’s surface could play an important role in twisting and braiding the Sun’s magnetic field lines. This may eventually contribute to magnetic reconnection, a process associated with solar flares, jets, and coronal mass ejections. These events can produce space weather that affects satellites, GPS systems, and power grids on Earth.
The researchers also compared the observations with MURaM computer simulations. The real and simulated vortices showed matching instability wavelengths of around 50–65 km, supporting the accuracy of current solar magnetohydrodynamic models.
The discovery could also provide new clues about the solar magnetic field mystery and the long-standing question of why the Sun’s outer atmosphere, or corona, reaches temperatures of millions of degrees.
