Scientists capture most detailed Sun images ever, potentially solving atmospheric mystery

Scientists have captured unprecedentedly detailed images of the Sun's surface, revealing intricate structures like tiny vortices and golden bands. These observations, made with the powerful Inouye Solar Telescope in Hawaii, focus on a magnetically active region near a sunspot and offer potential clues to one of solar physics' most enduring puzzles: why the Sun's outer atmosphere, the corona, is millions of degrees hotter than its surface.

“

This are the highest spatial resolution images of the Sun's surface ever taken

The new images showcase processes occurring on the Sun's surface with remarkable spatial resolution, capturing details as small as 20 kilometers. Dr. Friedrich Wöger, a senior scientist at the National Solar Observatory, described the images as "the highest spatial resolution images of the Sun's surface ever taken." Previous observations with the same telescope had shown the Sun's surface as a mosaic of granular structures, each about the size of France, with details around 30 kilometers wide. These latest findings push the boundaries of what the telescope can resolve.

Researchers identified small, vortex-like structures in the new images as evidence of Kelvin-Helmholtz instabilities. This phenomenon occurs when fast-moving plasma interacts with slower-moving fluid, creating shear and generating spiral, wave-like vortices. While these instabilities have been observed in Earth's oceans, clouds, and the atmospheres of Jupiter and Saturn, their confirmation on the Sun is a significant new finding. The discovery was published in the journal Nature.

“

My first reaction was: 'Incredible, how can we see such tiny and precise structures on the Sun?'

Explosive solar events, such as solar flares and coronal mass ejections, are driven by the Sun's powerful and dynamic magnetic fields. These events can disrupt Earth's power grids, satellites, GPS, and global communications. Although the magnetic fields are generated by the movement of hot, charged plasma within the Sun, the precise physical processes involved remain not fully understood. The detailed observation of these instabilities could provide crucial insights into how magnetic energy is stored and released, contributing to the heating of the solar corona.

“

This is something we have never seen before in any observation of the Sun.