Inouye Solar Telescope captures unprecedented images of solar plasma whirlpools

Astronomers using the Daniel K. Inouye Solar Telescope in Hawaii have captured the most detailed images ever of the Sun’s surface, revealing swirling plasma whirlpools known as Kelvin-Helmholtz instabilities (KHIs).

These tiny structures, some measuring less than 20 kilometers across, occur when layers of plasma move at different speeds, creating shear and vortices. The discovery, published in the journal Nature, provides direct observational evidence for a long-theorized fluid instability. Scientists believe these vortices may explain one of solar physics' greatest mysteries: why the Sun's outer atmosphere, or corona, is significantly hotter than its visible surface.

The telescope's unprecedented resolution allowed researchers to observe these fine-scale features near magnetically active regions and sunspots. By comparing the images with computer simulations, the team confirmed that the observed motions match theoretical predictions of KHIs. This breakthrough offers new insights into how energy is transferred through the Sun's atmosphere and how magnetic fields might generate solar flares.